Linux with KVM
Virtual GPU Software R535 for Linux with KVM Release Notes
Release information for all users of NVIDIA virtual GPU software and hardware on supported Linux with KVM hypervisors.
These Release Notes summarize current status, information on validated platforms, and known issues with NVIDIA vGPU software and associated hardware on Linux with KVM.
1.1. NVIDIA vGPU Software Driver Versions
Each release in this release family of NVIDIA vGPU software includes a specific version of the NVIDIA Virtual GPU Manager, NVIDIA Windows driver, and NVIDIA Linux driver.
NVIDIA vGPU Software Version | NVIDIA Virtual GPU Manager Version | NVIDIA Windows Driver Version | NVIDIA Linux Driver Version |
---|---|---|---|
16.8 | 535.216.01 | 538.95 | 535.216.01 |
16.7 | 535.183.04 | 538.78 | 535.183.06 |
16.6 | 535.183.04 | 538.67 | 535.183.01 |
16.5 | 535.161.05 | 538.46 | 535.161.08 |
16.4 | 535.161.05 | 538.33 | 535.161.07 |
16.3 | 535.154.02 | 538.15 | 535.154.05 |
16.2 | 535.129.03 | 537.70 | 535.129.03 |
16.1 | 535.104.06 | 537.13 | 535.104.05 |
16.0 | 535.54.06 | 536.25 | 535.54.03 |
For details of which Linux with KVM releases are supported, see Hypervisor Software Releases.
1.2. Compatibility Requirements for the NVIDIA vGPU Manager and Guest VM Driver
The releases of the NVIDIA vGPU Manager and guest VM drivers that you install must be compatible. If you install an incompatible guest VM driver release for the release of the vGPU Manager that you are using, the NVIDIA vGPU fails to load.
See VM running an incompatible NVIDIA vGPU guest driver fails to initialize vGPU when booted.
You must use NVIDIA License System with every release in this release family of NVIDIA vGPU software. All releases in this release family of NVIDIA vGPU software are incompatible with all releases of the NVIDIA vGPU software license server.
Compatible NVIDIA vGPU Manager and Guest VM Driver Releases
The following combinations of NVIDIA vGPU Manager and guest VM driver releases are compatible with each other.
- NVIDIA vGPU Manager with guest VM drivers from the same release
- NVIDIA vGPU Manager with guest VM drivers from different releases within the same major release branch
- NVIDIA vGPU Manager from a later major release branch with guest VM drivers from the previous branch
- NVIDIA vGPU Manager from a later long-term support branch with guest VM drivers from the previous long-term support branch
When NVIDIA vGPU Manager is used with guest VM drivers from a different release within the same branch or from the previous branch, the combination supports only the features, hardware, and software (including guest OSes) that are supported on both releases.
For example, if vGPU Manager from release 16.8 is used with guest drivers from release 13.1, the combination does not support Red Hat Enterprise Linux 8.1 because NVIDIA vGPU software release 16.8 does not support Red Hat Enterprise Linux 8.1.
The following table lists the specific software releases that are compatible with the components in the NVIDIA vGPU software 16 major release branch.
NVIDIA vGPU Software Component | Releases | Compatible Software Releases |
---|---|---|
NVIDIA vGPU Manager | 16.0 through 16.8 |
|
Guest VM drivers | 16.0 through 16.8 | NVIDIA vGPU Manager releases 16.0 through 16.8 |
Incompatible NVIDIA vGPU Manager and Guest VM Driver Releases
The following combinations of NVIDIA vGPU Manager and guest VM driver releases are incompatible with each other.
- NVIDIA vGPU Manager from a later major release branch with guest VM drivers from a production branch two or more major releases before the release of the vGPU Manager
- NVIDIA vGPU Manager from an earlier major release branch with guest VM drivers from a later branch
The following table lists the specific software releases that are incompatible with the components in the NVIDIA vGPU software 16 major release branch.
NVIDIA vGPU Software Component | Releases | Incompatible Software Releases |
---|---|---|
NVIDIA vGPU Manager | 16.0 through 16.8 | All guest VM driver releases 14.x and earlier, except 13.x releases |
Guest VM drivers | 16.0 through 16.8 | All NVIDIA vGPU Manager releases 15.x and earlier |
1.3. Updates in Release 16.8
New Features in Release 16.8
- Security updates - see Security Bulletin: NVIDIA GPU Display Driver - October 2024, which is posted shortly after the release date of this software and is listed on the NVIDIA Product Security page
- Miscellaneous bug fixes
1.4. Updates in Release 16.7
New Features in Release 16.7
- Security updates - see Security Bulletin: NVIDIA GPU Display Driver - July 2024, which is posted shortly after the release date of this software and is listed on the NVIDIA Product Security page
- Miscellaneous bug fixes
1.5. Updates in Release 16.6
New Features in Release 16.6
- Security updates - see Security Bulletin: NVIDIA GPU Display Driver - June 2024, which is posted shortly after the release date of this software and is listed on the NVIDIA Product Security page
- Miscellaneous bug fixes
1.6. Updates in Release 16.5
NVIDIA vGPU software 16.5 resolves an issue that affects graphics cards that are supported only by NVIDIA AI Enterprise.
1.7. Updates in Release 16.4
New Features in Release 16.4
- Security updates - see Security Bulletin: NVIDIA GPU Display Driver - February 2024, which is posted shortly after the release date of this software and is listed on the NVIDIA Product Security page
- Miscellaneous bug fixes
1.8. Updates in Release 16.3
New Features in Release 16.3
- Miscellaneous bug fixes
Hardware and Software Support Introduced in Release 16.3
- Newly supported graphics cards:
- NVIDIA L2
- NVIDIA L20
1.9. Updates in Release 16.2
New Features in Release 16.2
- Security updates - see Security Bulletin: NVIDIA GPU Display Driver - October 2023, which is posted shortly after the release date of this software and is listed on the NVIDIA Product Security page
- Miscellaneous bug fixes
1.10. Updates in Release 16.1
New Features in Release 16.1
- New options in the NVML API and the nvidia-smi command for getting the scheduling behavior of time-sliced vGPUs
- Miscellaneous bug fixes
Hardware and Software Support Introduced in Release 16.1
- Support for the for the following GPUs:
- NVIDIA L40S
- NVIDIA RTX 5000 Ada
1.11. Updates in Release 16.0
New Features in Release 16.0
- Support for 4K displays with an aspect ratio of 16:10
- Options in the NVML API and the nvidia-smi command for controlling the scheduling behavior of time-sliced vGPUs
- Security updates - see Security Bulletin: NVIDIA GPU Display Driver - June 2023, which is posted shortly after the release date of this software and is listed on the NVIDIA Product Security page
- Miscellaneous bug fixes
Feature Support Withdrawn in Release 16.0
- Product functionality no longer supported:
- NVIDIA Virtual Compute Server (vCS)
Note:
As a result of this change, C-series vGPU types are no longer available.
Instead, vCS is supported with NVIDIA AI Enterprise.
- NVIDIA Virtual Compute Server (vCS)
- Graphics cards no longer supported:
- Graphics cards that support only C-series vGPUs, namely:
- NVIDIA H800 PCIe 80GB
- NVIDIA H100 PCIe 80GB
- NVIDIA A800 PCIe 80GB
- NVIDIA A800 PCIe 80GB liquid cooled
- NVIDIA A800 HGX 80GB
- NVIDIA A100 PCIe 80GB
- NVIDIA A100 PCIe 80GB liquid cooled
- NVIDIA A100X
- NVIDIA A100 HGX 80GB
- NVIDIA A100 PCIe 40GB
- NVIDIA A100 HGX 40GB
- NVIDIA A30
- NVIDIA A30X
Instead, these graphics cards are supported with NVIDIA AI Enterprise.
- Graphics cards that support only C-series vGPUs, namely:
This release family of NVIDIA vGPU software provides support for several NVIDIA GPUs on validated server hardware platforms, Linux with KVM hypervisor software versions, and guest operating systems. It also supports the version of NVIDIA CUDA Toolkit that is compatible with R535 drivers.
2.1. Supported NVIDIA GPUs and Validated Server Platforms
This release of NVIDIA vGPU software on Linux with KVM provides support for several NVIDIA GPUs running on validated server hardware platforms.
For information about the NVIDIA GPUs supported by your specific hypervisor and the validated server hardware platforms on which they run, consult the documentation from your hypervisor vendor.
GPUs Based on the NVIDIA Ada Lovelace Architecture
GPU | Supported NVIDIA vGPU Software Products1, 2, 3 | |
---|---|---|
NVIDIA vGPU | GPU Pass Through | |
Since 16.1: NVIDIA L40S |
|
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NVIDIA L40 |
|
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Since 16.3: NVIDIA L20 |
|
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NVIDIA L4 |
|
|
Since 16.3: NVIDIA L2 |
|
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NVIDIA RTX 6000 Ada |
|
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Since 16.1: NVIDIA RTX 5000 Ada |
|
|
GPUs Based on the NVIDIA Ampere Architecture
GPU | Supported NVIDIA vGPU Software Products1, 2, 3 | |
---|---|---|
NVIDIA vGPU | GPU Pass Through | |
NVIDIA A404 |
|
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NVIDIA A16 |
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NVIDIA A10 |
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NVIDIA A2 |
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NVIDIA RTX A60004 |
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NVIDIA RTX A55004 |
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NVIDIA RTX A50004 |
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GPUs Based on the NVIDIA Turing Architecture
GPUs Based on the NVIDIA Volta Architecture
GPU | Supported NVIDIA vGPU Software Products1, 2, 3 | |
---|---|---|
NVIDIA vGPU | GPU Pass Through | |
Tesla V100 SXM2 |
|
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Tesla V100 SXM2 32GB |
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Tesla V100 PCIe |
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Tesla V100 PCIe 32GB |
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Tesla V100S PCIe 32GB |
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Tesla V100 FHHL |
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GPUs Based on the NVIDIA Pascal™ Architecture
GPU | Supported NVIDIA vGPU Software Products1, 2, 3 | |
---|---|---|
NVIDIA vGPU | GPU Pass Through | |
Tesla P4 |
|
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Tesla P6 |
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Tesla P40 |
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Tesla P100 PCIe 16 GB |
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Tesla P100 SXM2 16 GB |
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Tesla P100 PCIe 12GB |
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GPUs Based on the NVIDIA Maxwell Graphic Architecture
2.1.1. Support for a Mixture of Time-Sliced vGPU Types on the Same GPU
Linux with KVM supports time-sliced vGPUs with the same amount of frame buffer from different virtual GPU series on the same physical GPU. A-series, B-series, and Q-series vGPUs with the same amount of frame buffer, for example A40-2B and A40-2Q, can reside on the same physical GPU simultaneously.
2.2. Hypervisor Software Releases
NVIDIA vGPU software is supported on Linux with KVM platforms only by specific hypervisor software vendors. For information about which NVIDIA vGPU software releases and hypervisor software releases are supported, consult the documentation from your hypervisor vendor.
Hypervisor Vendor | Platform | Additional Information |
---|---|---|
H3C | CAS | |
Huawei | FusionSphere | |
Inspur | InCloud Sphere | |
Nutanix | AHV | Obtain the NVIDIA Virtual GPU Manager software directly from Nutanix through the My Nutanix portal (My Nutanix account required). Note:
If the NVIDIA vGPU software release that you need is not available from the My Nutanix portal, contact Nutanix.
Then follow the instructions on the My Nutanix portal to obtain the correct NVIDIA vGPU software graphics drivers from the NVIDIA Licensing Portal. |
Red Hat | OpenStack Platform | Configuring the Compute Service for Instance Creation |
Sangfor | aDesk | |
SUSE | Linux Enterprise Server | SUSE Linux Enterprise Server 15 - NVIDIA virtual GPU for KVM guests |
2.3. Guest OS Support
For information about Windows releases and Linux distributions supported as a guest OS, consult the documentation from your hypervisor vendor.
Use only a guest OS release that is listed as supported by NVIDIA vGPU software with your virtualization software. To be listed as supported, a guest OS release must be supported not only by NVIDIA vGPU software, but also by your virtualization software. NVIDIA cannot support guest OS releases that your virtualization software does not support.
NVIDIA vGPU software supports only 64-bit guest operating systems. No 32-bit guest operating systems are supported.
2.4. NVIDIA CUDA Toolkit Version Support
The releases in this release family of NVIDIA vGPU software support NVIDIA CUDA Toolkit 12.1.
To build a CUDA application, the system must have the NVIDIA CUDA Toolkit and the libraries required for linking. For details of the components of NVIDIA CUDA Toolkit, refer to NVIDIA CUDA Toolkit Release Notes for CUDA 12.1.0.
To run a CUDA application, the system must have a CUDA-enabled GPU and an NVIDIA display driver that is compatible with the NVIDIA CUDA Toolkit release that was used to build the application. If the application relies on dynamic linking for libraries, the system must also have the correct version of these libraries.
For more information about NVIDIA CUDA Toolkit, refer to CUDA Toolkit 12.1 Documentation.
If you are using NVIDIA vGPU software with CUDA on Linux, avoid conflicting installation methods by installing CUDA from a distribution-independent runfile package. Do not install CUDA from a distribution-specific RPM or Deb package.
To ensure that the NVIDIA vGPU software graphics driver is not overwritten when CUDA is installed, deselect the CUDA driver when selecting the CUDA components to install.
For more information, see NVIDIA CUDA Installation Guide for Linux.
2.5. Multiple vGPU Support
To support applications and workloads that are compute or graphics intensive, multiple vGPUs can be added to a single VM. The assignment of more than one vGPU to a VM is supported only on a subset of vGPUs and hypervisor software releases.
2.5.1. vGPUs that Support Multiple vGPUs Assigned to a VM
The supported vGPUs depend on the architecture of the GPU on which the vGPUs reside:
- For GPUs based on the NVIDIA Volta architecture and later GPU architectures, all Q-series vGPUs are supported.
- For GPUs based on the NVIDIA Pascal™ architecture, only Q-series vGPUs that are allocated all of the physical GPU's frame buffer are supported.
- For GPUs based on the NVIDIA NVIDIA Maxwell™ graphic architecture, only Q-series vGPUs that are allocated all of the physical GPU's frame buffer are supported.
You can assign multiple vGPUs with differing amounts of frame buffer to a single VM, provided the board type and the series of all the vGPUs is the same. For example, you can assign an A40-48Q vGPU and an A40-16Q vGPU to the same VM. However, you cannot assign an A30-8Q vGPU and an A16-8Q vGPU to the same VM.
Multiple vGPU Support on the NVIDIA Ada Lovelace Architecture
Board | vGPU |
---|---|
Since 16.1: NVIDIA L40S | All Q-series vGPUs |
NVIDIA L40 | All Q-series vGPUs |
Since 16.3: NVIDIA L20 | All Q-series vGPUs |
NVIDIA L4 | All Q-series vGPUs |
Since 16.3: NVIDIA L2 | All Q-series vGPUs |
NVIDIA RTX 6000 Ada | All Q-series vGPUs |
Since 16.1: NVIDIA RTX 5000 Ada | All Q-series vGPUs |
Multiple vGPU Support on the NVIDIA Ampere GPU Architecture
Board | vGPU |
---|---|
NVIDIA A40 | All Q-series vGPUs See Note (1). |
NVIDIA A16 | All Q-series vGPUs See Note (1). |
NVIDIA A10 | All Q-series vGPUs See Note (1). |
NVIDIA A2 | All Q-series vGPUs See Note (1). |
NVIDIA RTX A6000 | All Q-series vGPUs See Note (1). |
NVIDIA RTX A5500 | All Q-series vGPUs See Note (1). |
NVIDIA RTX A5000 | All Q-series vGPUs See Note (1). |
Multiple vGPU Support on the NVIDIA Turing GPU Architecture
Board | vGPU |
---|---|
Tesla T4 | All Q-series vGPUs |
Quadro RTX 6000 | All Q-series vGPUs |
Quadro RTX 6000 passive | All Q-series vGPUs |
Quadro RTX 8000 | All Q-series vGPUs |
Quadro RTX 8000 passive | All Q-series vGPUs |
Multiple vGPU Support on the NVIDIA Volta GPU Architecture
Board | vGPU |
---|---|
Tesla V100 SXM2 32GB | All Q-series vGPUs |
Tesla V100 PCIe 32GB | All Q-series vGPUs |
Tesla V100S PCIe 32GB | All Q-series vGPUs |
Tesla V100 SXM2 | All Q-series vGPUs |
Tesla V100 PCIe | All Q-series vGPUs |
Tesla V100 FHHL | All Q-series vGPUs |
Multiple vGPU Support on the NVIDIA Pascal GPU Architecture
Board | vGPU |
---|---|
Tesla P100 SXM2 | P100X-16Q |
Tesla P100 PCIe 16GB | P100-16Q |
Tesla P100 PCIe 12GB | P100C-12Q |
Tesla P40 | P40-24Q |
Tesla P6 | P6-16Q |
Tesla P4 | P4-8Q |
Multiple vGPU Support on the NVIDIA Maxwell GPU Architecture
Board | vGPU |
---|---|
Tesla M60 | M60-8Q |
Tesla M10 | M10-8Q |
Tesla M6 | M6-8Q |
2.5.2. Maximum Number of vGPUs Supported per VM
For Linux with KVM, NVIDIA vGPU software supports up to a maximum of 16 vGPUs per VM.
2.5.3. Hypervisor Releases that Support Multiple vGPUs Assigned to a VM
For information about which generic Linux with KVM hypervisor software releases support the assignment of more than one vGPU device to a VM, consult the documentation from your hypervisor vendor.
2.6. Peer-to-Peer CUDA Transfers over NVLink Support
Peer-to-peer CUDA transfers enable device memory between vGPUs on different GPUs that are assigned to the same VM to be accessed from within the CUDA kernels. NVLink is a high-bandwidth interconnect that enables fast communication between such vGPUs. Peer-to-Peer CUDA transfers over NVLink are supported only on a subset of vGPUs, Linux with KVM releases, and guest OS releases.
2.6.1. vGPUs that Support Peer-to-Peer CUDA Transfers
Only Q-series and C-series time-sliced vGPUs that are allocated all of the physical GPU's frame buffer on physical GPUs that support NVLink are supported.
Peer-to-Peer CUDA Transfer Support on the NVIDIA Ampere GPU Architecture
Board | vGPU |
---|---|
NVIDIA A40 | A40-48Q |
NVIDIA A10 | A10-24Q |
NVIDIA RTX A6000 | A6000-48Q |
NVIDIA RTX A5500 | A5500-24Q |
NVIDIA RTX A5000 | A5000-24Q |
Peer-to-Peer CUDA Transfer Support on the NVIDIA Turing GPU Architecture
Board | vGPU |
---|---|
Quadro RTX 6000 | RTX6000-24Q |
Quadro RTX 6000 passive | RTX6000P-24Q |
Quadro RTX 8000 | RTX8000-48Q |
Quadro RTX 8000 passive | RTX8000P-48Q |
Peer-to-Peer CUDA Transfer Support on the NVIDIA Volta GPU Architecture
Board | vGPU |
---|---|
Tesla V100 SXM2 32GB | V100DX-32Q |
Tesla V100 SXM2 | V100X-16Q |
Peer-to-Peer CUDA Transfer Support on the NVIDIA Pascal GPU Architecture
Board | vGPU |
---|---|
Tesla P100 SXM2 | P100X-16Q |
2.6.2. Hypervisor Releases that Support Peer-to-Peer CUDA Transfers
Peer-to-Peer CUDA transfers over NVLink are supported on all hypervisor releases that support the assignment of more than one vGPU to a VM. For details, see Multiple vGPU Support.
2.6.3. Guest OS Releases that Support Peer-to-Peer CUDA Transfers
Linux only. Peer-to-Peer CUDA transfers over NVLink are not supported on Windows.
2.6.4. Limitations on Support for Peer-to-Peer CUDA Transfers
- NVSwitch is not supported. Only direct connections are supported.
- Only time-sliced vGPUs are supported. MIG-backed vGPUs are not supported.
- PCIe is not supported.
- SLI is not supported.
2.7. Unified Memory Support
Unified memory is a single memory address space that is accessible from any CPU or GPU in a system. It creates a pool of managed memory that is shared between the CPU and GPU to provide a simple way to allocate and access data that can be used by code running on any CPU or GPU in the system. Unified memory is supported only on a subset of vGPUs and guest OS releases.
Unified memory is disabled by default. If used, you must enable unified memory individually for each vGPU that requires it by setting a vGPU plugin parameter. NVIDIA CUDA Toolkit profilers are supported and can be enabled on a VM for which unified memory is enabled.
2.7.1. vGPUs that Support Unified Memory
Only Q-series vGPUs that are allocated all of the physical GPU's frame buffer on physical GPUs that support unified memory are supported.
Unified Memory Support on the NVIDIA Ada Lovelace GPU Architecture
Board | vGPU |
---|---|
NVIDIA L40 | L40-48Q |
Since 16.1: NVIDIA L40S | L40S-48Q |
Since 16.3: NVIDIA L20 | L20-48Q |
NVIDIA L4 | L4-24Q |
Since 16.3: NVIDIA L2 | L2-24Q |
NVIDIA RTX 6000 Ada | RTX 6000 Ada-48Q |
Since 16.1: NVIDIA RTX 5000 Ada | RTX 5000 Ada-32Q |
Unified Memory Support on the NVIDIA Ampere GPU Architecture
Board | vGPU |
---|---|
NVIDIA A40 | A40-48Q |
NVIDIA A16 | A16-16Q |
NVIDIA A10 | A10-24Q |
NVIDIA A2 | A2-16Q |
NVIDIA RTX A6000 | A6000-48Q |
NVIDIA RTX A5500 | A5500-24Q |
NVIDIA RTX A5000 | A5000-24Q |
2.7.2. Guest OS Releases that Support Unified Memory
Linux only. Unified memory is not supported on Windows.
2.7.3. Limitations on Support for Unified Memory
- Only time-sliced Q-series and C-series vGPUs that are allocated all of the physical GPU's frame buffer on physical GPUs that support unified memory are supported. Fractional time-sliced vGPUs are not supported.
2.8. NVIDIA Deep Learning Super Sampling (DLSS) Support
NVIDIA vGPU software supports NVIDIA DLSS on NVIDIA RTX Virtual Workstation.
Supported DLSS versions: 2.0. Version 1.0 is not supported. Supported GPUs:
- NVIDIA L40
- Since 16.1: NVIDIA L40S
- Since 16.3: NVIDIA L20
- NVIDIA L4
- Since 16.3: NVIDIA L2
- NVIDIA RTX 6000 Ada
- Since 16.1: NVIDIA RTX 5000 Ada
- NVIDIA A40
- NVIDIA A16
- NVIDIA A2
- NVIDIA A10
- NVIDIA RTX A6000
- NVIDIA RTX A5500
- NVIDIA RTX A5000
- Tesla T4
- Quadro RTX 8000
- Quadro RTX 8000 passive
- Quadro RTX 6000
- Quadro RTX 6000 passive
NVIDIA graphics driver components that DLSS requires are installed only if a supported GPU is detected during installation of the driver. Therefore, if the creation of VM templates includes driver installation, the template should be created from a VM that is configured with a supported GPU while the driver is being installed.
Supported applications: only applications that use nvngx_dlss.dll version 2.0.18 or newer
Known product limitations for this release of NVIDIA vGPU software are described in the following sections.
3.1. NVENC does not support resolutions greater than 4096×4096
Description
The NVIDIA hardware-based H.264 video encoder (NVENC) does not support resolutions greater than 4096×4096. This restriction applies to all NVIDIA GPU architectures and is imposed by the GPU encoder hardware itself, not by NVIDIA vGPU software. The maximum supported resolution for each encoding scheme is listed in the documentation for NVIDIA Video Codec SDK. This limitation affects any remoting tool where H.264 encoding is used with a resolution greater than 4096×4096. Most supported remoting tools fall back to software encoding in such scenarios.
Workaround
If your GPU is based on a GPU architecture later than the NVIDIA Maxwell® architecture, use H.265 encoding. H.265 is more efficient than H.264 encoding and has a maximum resolution of 8192×8192. On GPUs based on the NVIDIA Maxwell architecture, H.265 has the same maximum resolution as H.264, namely 4096×4096.
Resolutions greater than 4096×4096 are supported only by the H.265 decoder that 64-bit client applications use. The H.265 decoder that 32-bit applications use supports a maximum resolution of 4096×4096.
3.2. vCS is not supported on Linux with KVM
NVIDIA Virtual Compute Server (vCS) is not supported on Linux with KVM. C-series vGPU types are not available.
3.3. Nested Virtualization Is Not Supported by NVIDIA vGPU
NVIDIA vGPU deployments do not support nested virtualization, that is, running a hypervisor in a guest VM. For example, enabling the Hyper-V role in a guest VM running the Windows Server OS is not supported because it entails enabling nested virtualization. Similarly, enabling Windows Hypervisor Platform is not supported because it requires the Hyper-V role to be enabled.
3.4. Issues occur when the channels allocated to a vGPU are exhausted
Description
Issues occur when the channels allocated to a vGPU are exhausted and the guest VM to which the vGPU is assigned fails to allocate a channel to the vGPU. A physical GPU has a fixed number of channels and the number of channels allocated to each vGPU is inversely proportional to the maximum number of vGPUs allowed on the physical GPU.
When the channels allocated to a vGPU are exhausted and the guest VM fails to allocate a channel, the following errors are reported on the hypervisor host or in an NVIDIA bug report:
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): Guest attempted to allocate channel above its max channel limit 0xfb
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): VGPU message 6 failed, result code: 0x1a
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): 0xc1d004a1, 0xff0e0000, 0xff0400fb, 0xc36f,
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): 0x1, 0xff1fe314, 0xff1fe038, 0x100b6f000, 0x1000,
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): 0x80000000, 0xff0e0200, 0x0, 0x0, (Not logged),
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): 0x1, 0x0
Jun 26 08:01:25 srvxen06f vgpu-3[14276]: error: vmiop_log: (0x0): , 0x0
Workaround
Use a vGPU type with more frame buffer, thereby reducing the maximum number of vGPUs allowed on the physical GPU. As a result, the number of channels allocated to each vGPU is increased.
3.5. Virtual GPU hot plugging is not supported
NVIDIA vGPU software does not support the addition of virtual function I/O (VFIO) mediated device (mdev) devices after the VM has been started by QEMU. All mdev devices must be added before the VM is started.
3.6. Total frame buffer for vGPUs is less than the total frame buffer on the physical GPU
Some of the physical GPU's frame buffer is used by the hypervisor on behalf of the VM for allocations that the guest OS would otherwise have made in its own frame buffer. The frame buffer used by the hypervisor is not available for vGPUs on the physical GPU. In NVIDIA vGPU deployments, frame buffer for the guest OS is reserved in advance, whereas in bare-metal deployments, frame buffer for the guest OS is reserved on the basis of the runtime needs of applications.
If error-correcting code (ECC) memory is enabled on a physical GPU that does not have HBM2 memory, the amount of frame buffer that is usable by vGPUs is further reduced. All types of vGPU are affected, not just vGPUs that support ECC memory.
On all GPUs that support ECC memory and, therefore, dynamic page retirement, additional frame buffer is allocated for dynamic page retirement. The amount that is allocated is inversely proportional to the maximum number of vGPUs per physical GPU. All GPUs that support ECC memory are affected, even GPUs that have HBM2 memory or for which ECC memory is disabled.
The approximate amount of frame buffer that NVIDIA vGPU software reserves can be calculated from the following formula:
max-reserved-fb = vgpu-profile-size-in-mb÷16 + 16 + ecc-adjustments + page-retirement-allocation + compression-adjustment
- max-reserved-fb
- The maximum total amount of reserved frame buffer in Mbytes that is not available for vGPUs.
- vgpu-profile-size-in-mb
- The amount of frame buffer in Mbytes allocated to a single vGPU. This amount depends on the vGPU type. For example, for the T4-16Q vGPU type, vgpu-profile-size-in-mb is 16384.
- ecc-adjustments
-
The amount of frame buffer in Mbytes that is not usable by vGPUs when ECC is enabled on a physical GPU that does not have HBM2 memory.
- If ECC is enabled on a physical GPU that does not have HBM2 memory ecc-adjustments is fb-without-ecc/16, which is equivalent to 64 Mbytes for every Gbyte of frame buffer assigned to the vGPU. fb-without-ecc is total amount of frame buffer with ECC disabled.
- If ECC is disabled or the GPU has HBM2 memory, ecc-adjustments is 0.
- page-retirement-allocation
-
The amount of frame buffer in Mbytes that is reserved for dynamic page retirement.
- On GPUs based on the NVIDIA Maxwell GPU architecture, page-retirement-allocation = 4÷max-vgpus-per-gpu.
- On GPUs based on NVIDIA GPU architectures after the Maxwell architecture, page-retirement-allocation = 128÷max-vgpus-per-gpu
- max-vgpus-per-gpu
- The maximum number of vGPUs that can be created simultaneously on a physical GPU. This number varies according to the vGPU type. For example, for the T4-16Q vGPU type, max-vgpus-per-gpu is 1.
- compression-adjustment
-
The amount of frame buffer in Mbytes that is reserved for the higher compression overhead in vGPU types with 12 Gbytes or more of frame buffer on GPUs based on the Turing architecture.
compression-adjustment depends on the vGPU type as shown in the following table.
vGPU Type Compression Adjustment (MB) T4-16Q
T4-16C
T4-16A
28 RTX6000-12Q
RTX6000-12C
RTX6000-12A
32 RTX6000-24Q
RTX6000-24C
RTX6000-24A
104 RTX6000P-12Q
RTX6000P-12C
RTX6000P-12A
32 RTX6000P-24Q
RTX6000P-24C
RTX6000P-24A
104 RTX8000-12Q
RTX8000-12C
RTX8000-12A
32 RTX8000-16Q
RTX8000-16C
RTX8000-16A
64 RTX8000-24Q
RTX8000-24C
RTX8000-24A
96 RTX8000-48Q
RTX8000-48C
RTX8000-48A
238 RTX8000P-12Q
RTX8000P-12C
RTX8000P-12A
32 RTX8000P-16Q
RTX8000P-16C
RTX8000P-16A
64 RTX8000P-24Q
RTX8000P-24C
RTX8000P-24A
96 RTX8000P-48Q
RTX8000P-48C
RTX8000P-48A
238 For all other vGPU types, compression-adjustment is 0.
In VMs running Windows Server 2012 R2, which supports Windows Display Driver Model (WDDM) 1.x, an additional 48 Mbytes of frame buffer are reserved and not available for vGPUs.
3.7. Issues may occur with graphics-intensive OpenCL applications on vGPU types with limited frame buffer
Description
Issues may occur when graphics-intensive OpenCL applications are used with vGPU types that have limited frame buffer. These issues occur when the applications demand more frame buffer than is allocated to the vGPU.
For example, these issues may occur with the Adobe Photoshop and LuxMark OpenCL Benchmark applications:
- When the image resolution and size are changed in Adobe Photoshop, a program error may occur or Photoshop may display a message about a problem with the graphics hardware and a suggestion to disable OpenCL.
- When the LuxMark OpenCL Benchmark application is run, XID error 31 may occur.
Workaround
For graphics-intensive OpenCL applications, use a vGPU type with more frame buffer.
3.8. In pass through mode, all GPUs connected to each other through NVLink must be assigned to the same VM
Description
In pass through mode, all GPUs connected to each other through NVLink must be assigned to the same VM. If a subset of GPUs connected to each other through NVLink is passed through to a VM, unrecoverable error XID 74
occurs when the VM is booted. This error corrupts the NVLink state on the physical GPUs and, as a result, the NVLink bridge between the GPUs is unusable.
Workaround
Restore the NVLink state on the physical GPUs by resetting the GPUs or rebooting the hypervisor host.
3.9. vGPU profiles with 512 Mbytes or less of frame buffer support only 1 virtual display head on Windows 10
Description
To reduce the possibility of memory exhaustion, vGPU profiles with 512 Mbytes or less of frame buffer support only 1 virtual display head on a Windows 10 guest OS.
The following vGPU profiles have 512 Mbytes or less of frame buffer:
- Tesla M6-0B, M6-0Q
- Tesla M10-0B, M10-0Q
- Tesla M60-0B, M60-0Q
Workaround
Use a profile that supports more than 1 virtual display head and has at least 1 Gbyte of frame buffer.
3.10. NVENC requires at least 1 Gbyte of frame buffer
Description
Using the frame buffer for the NVIDIA hardware-based H.264/HEVC video encoder (NVENC) may cause memory exhaustion with vGPU profiles that have 512 Mbytes or less of frame buffer. To reduce the possibility of memory exhaustion, NVENC is disabled on profiles that have 512 Mbytes or less of frame buffer. Application GPU acceleration remains fully supported and available for all profiles, including profiles with 512 MBytes or less of frame buffer. NVENC support from both Citrix and VMware is a recent feature and, if you are using an older version, you should experience no change in functionality.
The following vGPU profiles have 512 Mbytes or less of frame buffer:
- Tesla M6-0B, M6-0Q
- Tesla M10-0B, M10-0Q
- Tesla M60-0B, M60-0Q
Workaround
If you require NVENC to be enabled, use a profile that has at least 1 Gbyte of frame buffer.
3.11. VM running an incompatible NVIDIA vGPU guest driver fails to initialize vGPU when booted
Description
A VM running a version of the NVIDIA guest VM driver that is incompatible with the current release of Virtual GPU Manager will fail to initialize vGPU when booted on a Linux with KVM platform running that release of Virtual GPU Manager.
A guest VM driver is incompatible with the current release of Virtual GPU Manager in either of the following situations:
-
The guest driver is from a release in a branch two or more major releases before the current release, for example release 9.4.
In this situation, the Linux with KVM VM’s /var/log/messages log file reports the following error:
vmiop_log: (0x0): Incompatible Guest/Host drivers: Guest VGX version is older than the minimum version supported by the Host. Disabling vGPU.
-
The guest driver is from a later release than the Virtual GPU Manager.
In this situation, the Linux with KVM VM’s /var/log/messages log file reports the following error:
vmiop_log: (0x0): Incompatible Guest/Host drivers: Guest VGX version is newer than the maximum version supported by the Host. Disabling vGPU.
In either situation, the VM boots in standard VGA mode with reduced resolution and color depth. The NVIDIA virtual GPU is present in Windows Device Manager but displays a warning sign, and the following device status:
Windows has stopped this device because it has reported problems. (Code 43)
Resolution
Install a release of the NVIDIA guest VM driver that is compatible with current release of Virtual GPU Manager.
3.12. Single vGPU benchmark scores are lower than pass-through GPU
Description
A single vGPU configured on a physical GPU produces lower benchmark scores than the physical GPU run in pass-through mode.
Aside from performance differences that may be attributed to a vGPU’s smaller frame buffer size, vGPU incorporates a performance balancing feature known as Frame Rate Limiter (FRL). On vGPUs that use the best-effort scheduler, FRL is enabled. On vGPUs that use the fixed share or equal share scheduler, FRL is disabled.
FRL is used to ensure balanced performance across multiple vGPUs that are resident on the same physical GPU. The FRL setting is designed to give good interactive remote graphics experience but may reduce scores in benchmarks that depend on measuring frame rendering rates, as compared to the same benchmarks running on a pass-through GPU.
Resolution
FRL is controlled by an internal vGPU setting. On vGPUs that use the best-effort scheduler, NVIDIA does not validate vGPU with FRL disabled, but for validation of benchmark performance, FRL can be temporarily disabled by setting frame_rate_limiter=0
in the vGPU configuration file.
# echo "frame_rate_limiter=0" > /sys/bus/mdev/devices/vgpu-id/nvidia/vgpu_params
For example:
# echo "frame_rate_limiter=0" > /sys/bus/mdev/devices/aa618089-8b16-4d01-a136-25a0f3c73123/nvidia/vgpu_params
The setting takes effect the next time any VM using the given vGPU type is started.
With this setting in place, the VM’s vGPU will run without any frame rate limit.
The FRL can be reverted back to its default setting as follows:
-
Clear all parameter settings in the vGPU configuration file.
# echo " " > /sys/bus/mdev/devices/vgpu-id/nvidia/vgpu_params
Note:You cannot clear specific parameter settings. If your vGPU configuration file contains other parameter settings that you want to keep, you must reinstate them in the next step.
-
Set
frame_rate_limiter=1
in the vGPU configuration file.# echo "frame_rate_limiter=1" > /sys/bus/mdev/devices/vgpu-id/nvidia/vgpu_params
If you need to reinstate other parameter settings, include them in the command to set
frame_rate_limiter=1
. For example:# echo "frame_rate_limiter=1 disable_vnc=1" > /sys/bus/mdev/devices/aa618089-8b16-4d01-a136-25a0f3c73123/nvidia/vgpu_params
3.13. nvidia-smi fails to operate when all GPUs are assigned to GPU pass-through mode
Description
If all GPUs in the platform are assigned to VMs in pass-through mode, nvidia-smi will return an error:
[root@vgx-test ~]# nvidia-smi
Failed to initialize NVML: Unknown Error
This is because GPUs operating in pass-through mode are not visible to nvidia-smi and the NVIDIA kernel driver operating in the Linux with KVMhost.
To confirm that all GPUs are operating in pass-through mode, confirm that the vfio-pci
kernel driver is handling each device.
# lspci -s 05:00.0 -k
05:00.0 VGA compatible controller: NVIDIA Corporation GM204GL [Tesla M60] (rev a1)
Subsystem: NVIDIA Corporation Device 113a
Kernel driver in use: vfio-pci
Resolution
N/A
Only resolved issues that have been previously noted as known issues or had a noticeable user impact are listed. The summary and description for each resolved issue indicate the effect of the issue on NVIDIA vGPU software before the issue was resolved.
4.1. Issues Resolved in Release 16.8
No resolved issues are reported in this release for Linux with KVM.
4.2. Issues Resolved in Release 16.7
No resolved issues are reported in this release for Linux with KVM.
4.3. Issues Resolved in Release 16.6
Bug ID | Summary and Description |
---|---|
4600308 | 16.0-16.5 Only: XID error 120 causes multiple issues with NVIDIA vGPU on GPUs with a GSP XID error 120 causes multiple issues with VMs configured with NVIDIA vGPU on a physical GPU that includes a GPU System Processor (GSP), such as GPUs based on the NVIDIA Ada Lovelace GPU architecture. Examples of these issues include:
|
4644559 | When multiple VMs configured with NVIDIA vGPU are shut down simultaneously, XID error 119 causes the hypervisor host to hang or crash. This issue affects VMs configured with NVIDIA vGPU on a physical GPU that includes a GPU System Processor (GSP), such as GPUs based on the NVIDIA Ada Lovelace GPU architecture. |
4.4. Issues Resolved in Release 16.5
No resolved issues are reported in this release for Linux with KVM.
4.5. Issues Resolved in Release 16.4
Bug ID | Summary and Description |
---|---|
3973158 | 16.0-16.3 Only: Pixelation occurs on a Windows VM configured with a Tesla T4 vGPU Users might experience poor graphics quality on a Windows VM that is configured with a vGPU on a Tesla T4 GPU. This issue can cause random pixelation on the entire screen, or only on some patches of the screen. No errors are reported or written to the log files when this issue occurs. |
4.6. Issues Resolved in Release 16.3
Bug ID | Summary and Description |
---|---|
4399699 | 16.0-16.2 Only: Black screens and display disconnection occur after reboot After the hypervisor host is rebooted, a black screen occurs if an attempt is made to connect to a VM configured with NVIDIA vGPU. This issue affects only GPUs based on the Ampere GPU architecture and later GPU architectures. When this issue occurs, the following error messages are written to the log files on the hypervisor host.
|
4.7. Issues Resolved in Release 16.2
Bug ID | Summary and Description |
---|---|
4309888 | 16.0, 16.1 Only: NVWMI functions for faking EDID have no effect The NVIDIA Enterprise Management Toolkit (NVWMI) functions for faking Extended Display Identification Data (EDID), namely, |
4.8. Issues Resolved in Release 16.1
Bug ID | Summary and Description |
---|---|
4142288 | 16.0 Only: The NVIDIA L40 GPU brand is incorrectly identified if GSP firmware is disabled If GPU System Processor (GSP) firmware is disabled, the NVIDIA Virtual GPU Manager incorrectly identifies the brand of the NVIDIA L40 GPU. This incorrect identification of the GPU brand might cause performance degradation with some applications that are optimised for features of the NVIDIA L40 that are not available in the incorrect brand. However, the output from the nvidia-smi command is not affected. |
4052185 | While the nvidia-bug-report.sh script on is running on the hypervisor host to capture configuration data for a bug report, the following error message is displayed:
|
3641947 | 16.0 Only: Graphics applications are corrupted on some Windows vGPU VMs Graphics applications are corrupted on Windows VMs that are configured with one or more vGPUs that are based on the NVIDIA Ampere or NVIDIA Ada Lovelace GPU architecture. |
4.9. Issues Resolved in Release 16.0
Bug ID | Summary and Description |
---|---|
4096848 | Optical Flow object allocation fails on VMs configured with vGPUs based on the NVIDIA Ampere architecture Optical Flow object allocation fails on VMs configured with vGPUs that reside on GPUs based on the NVIDIA Ampere GPU architecture. This issue has been observed as the failure of the Omniverse Kit container on a VM configured with NVIDIA vGPU. |
3936030 | CUDA applications fail on any VM configured with multiple vGPUs when unified memory is enabled CUDA applications fail on any VM configured with multiple vGPUs based on the NVIDIA Ada Lovelace GPU architecture when unified memory is enabled for the VM. Whenever a CUDA application fails, the following message is observed on the hypervisor host:
|
3334310 | NVIDIA Control Panel is started only for the RDP user that logs on first On all supported Windows Server guest OS releases, NVIDIA Control Panel is started only for the RDP user that logs on first. Other users cannot start NVIDIA Control Panel. If more than one RDP user is logged on when NVIDIA Control Panel is started, it always opens in the session of the RDP user that logged on first, irrespective of which user started NVIDIA Control Panel. Furthermore, on Windows Server 2016, NVIDIA Control Panel crashes if a user session is disconnected and then reconnected while NVIDIA Control Panel is open. |
5.1. CATIA performance is degraded with large assembly visualization
Description
On Windows VMs configured with NVIDIA vGPU, the performance of the CATIA application is degraded if the Optimize CGR for large assembly visualization setting is enabled.
Workaround
In NVIDIA Control Panel, on the Manage 3D settings page, set Threaded optimization to Off.
Status
Open
Ref. #
4480745
5.2. Disabling or disconnecting a display can cause a TDR on a Windows vGPU VM
Description
Disabling or disconnecting a display can cause a Timeout Detection and Recovery (TDR) error on a Windows VM that is configured with NVIDIA vGPU. The TDR error might cause a VM crash or intermittent black screens with remoting solutions such as Omnissa Horizon. When this error occurs, TDR error, XID error 44, and XID error 109 messages are written to the log file on the hypervisor host.
Status
Open
Ref. #
4558671
5.3. 16.0-16.5 Only: XID error 120 causes multiple issues with NVIDIA vGPU on GPUs with a GSP
Description
XID error 120 causes multiple issues with VMs configured with NVIDIA vGPU on a physical GPU that includes a GPU System Processor (GSP), such as GPUs based on the NVIDIA Ada Lovelace GPU architecture. Examples of these issues include:
- VMs hang or crash
- VMs fail to power on after hanging or a crashing.
- The hypervisor host crashes.
Status
Resolved in NVIDIA vGPU software 16.6
Ref. #
4600308
5.4. 16.0-16.5 Only: XID error 119 causes the hypervisor host to hang or crash when multiple vGPU VMs are shut down
Description
When multiple VMs configured with NVIDIA vGPU are shut down simultaneously, XID error 119 causes the hypervisor host to hang or crash. This issue affects VMs configured with NVIDIA vGPU on a physical GPU that includes a GPU System Processor (GSP), such as GPUs based on the NVIDIA Ada Lovelace GPU architecture.
Status
Resolved in NVIDIA vGPU software 16.6
Ref. #
4644559
5.5. 16.0-16.2 Only: Black screens and display disconnection occur after reboot
Description
After the hypervisor host is rebooted, a black screen occurs if an attempt is made to connect to a VM configured with NVIDIA vGPU. This issue affects only GPUs based on the Ampere GPU architecture and later GPU architectures. When this issue occurs, the following error messages are written to the log files on the hypervisor host.
- XID error 38
- XID error 43
- XID error 109
- vGPU Message 22
- Timeout detection and recovery (TDR) failures
Status
Resolved in NVIDIA vGPU software 16.3
Ref. #
4399699
5.6. 16.0-16.3 Only: Pixelation occurs on a Windows VM configured with a Tesla T4 vGPU
Description
Users might experience poor graphics quality on a Windows VM that is configured with a vGPU on a Tesla T4 GPU. This issue can cause random pixelation on the entire screen, or only on some patches of the screen. No errors are reported or written to the log files when this issue occurs.
Workaround
Contact NVIDIA Enterprise Support for assistance with a workaround for this issue.
Status
Resolved in NVIDIA vGPU software 16.4
Ref. #
3973158
5.7. NVIDIA Control Panel is not available in multiuser environments
Description
After the NVIDIA vGPU software graphics driver for Windows is installed, the NVIDIA Control Panel app might be missing from the system. This issue typically occurs in the following situations:
- Multiple users connect to virtual machines by using remote desktop applications such as Microsoft RDP, Omnissa Horizon, and Citrix Virtual Apps and Desktops.
- VM instances are created by using Citrix Machine Creation Services (MCS) or VMware Instant Clone technology.
- Roaming user desktop profiles are deployed.
This issue occurs because the NVIDIA Control Panel app is now distributed through the Microsoft Store. The NVIDIA Control Panel app might fail to be installed when the NVIDIA vGPU software graphics driver for Windows is installed if the Microsoft Store app is disabled, the system is not connected to the Internet, or installation of apps from the Microsoft Store is blocked by your system settings. To determine whether the NVIDIA Control Panel app is installed on your system, use the Windows Settings app or the Get-AppxPackage Windows PowerShell command.
-
To use the Windows Settings app:
- From the Windows Start menu, choose Settings > Apps > Apps & feautures.
- In the Apps & features window, type nvidia control panel in the search box and confirm that the NVIDIA Control Panel app is found.
-
To use the Get-AppxPackageWindows PowerShell command:
- Run Windows PowerShell as Administrator.
- Determine whether the NVIDIA Control Panel app is installed for the current user.
PS C:\> Get-AppxPackage -Name NVIDIACorp.NVIDIAControlPanel
- Determine whether the NVIDIA Control Panel app is installed for all users.
PS C:\> Get-AppxPackage -AllUsers -Name NVIDIACorp.NVIDIAControlPanel
Administrator
,pliny
, andtrajan
.PS C:\> Get-AppxPackage -AllUsers -Name NVIDIACorp.NVIDIAControlPanel Name : NVIDIACorp.NVIDIAControlPanel Publisher : CN=D6816951-877F-493B-B4EE-41AB9419C326 Architecture : X64 ResourceId : Version : 8.1.964.0 PackageFullName : NVIDIACorp.NVIDIAControlPanel_8.1.964.0_x64__56jybvy8sckqj InstallLocation : C:\Program Files\WindowsApps\NVIDIACorp.NVIDIAControlPanel_8.1.964.0_x64__56jybvy8sckqj IsFramework : False PackageFamilyName : NVIDIACorp.NVIDIAControlPanel_56jybvy8sckqj PublisherId : 56jybvy8sckqj PackageUserInformation : {S-1-12-1-530092550-1307989247-1105462437-500 [Administrator]: Installed, S-1-12-1-530092550-1307989247-1105462437-1002 [pliny]: Installed, S-1-12-1-530092550-1307989247-1105462437-1003 [trajan]: Installed} IsResourcePackage : False IsBundle : False IsDevelopmentMode : False NonRemovable : False IsPartiallyStaged : False SignatureKind : Store Status : Ok
Preventing this Issue
Since 16.3: If your system does not allow the installation apps from the Microsoft Store, download and run the standalone NVIDIA Control Panel installer that is available from NVIDIA Licensing Portal. For instructions, refer to Virtual GPU Software User Guide. If your system can allow the installation apps from the Microsoft Store, ensure that:
- The Microsoft Store app is enabled.
- Installation of Microsoft Store apps is not blocked by your system settings.
- No local or group policies are set to block Microsoft Store apps.
Workaround
If the NVIDIA Control Panel app is missing, install it separately from the graphics driver.
- Since 16.3: You can install the NVIDIA Control Panel app by downloading and running the standalone NVIDIA Control Panel installer that is available from NVIDIA Licensing Portal. For instructions, refer to Virtual GPU Software User Guide.
- 16.0-16.2 only: For a system that is running Windows 11 or a modern version of Windows 10, you can install the NVIDIA Control Panel app by using the winget command-line tool of Windows Package Manager.
Note:
The winget command-line tool is not available on the Windows Server OS.
- Your system is connected to the Internet.
- The Microsoft Store app is enabled.
- Packages on which winget depends, such as
Microsoft.UI.Xaml
andMicrosoft.VCLibs.x64
, are installed.
To use the winget command-line tool to install the NVIDIA Control Panel app, run the following command:
PS C:\> winget install "NVIDIA Control Panel" --id 9NF8H0H7WMLT -s msstore --accept-package-agreements --accept-source-agreements
For information about how to download and use the latest winget version, refer to Use the winget tool to install and manage applications on the Microsoft documentation site.
If the issue persists, contact NVIDIA Enterprise Support for further assistance.
Status
Open
Ref. #
3999308
5.8. 16.0, 16.1 Only: NVWMI functions for faking EDID have no effect
Description
The NVIDIA Enterprise Management Toolkit (NVWMI) functions for faking Extended Display Identification Data (EDID), namely, fakeEDID
, fakeEDIDAll
, and fakeEDIDOnPort
have no effect. This issue affects only Windows guest VMs and can prevent a VM from being enabled with multiple displays. When this issue occurs, unable to fake EDID
events can be seen in Event Viewer.
Status
Resolved in NVIDIA vGPU software 16.2
Ref. #
4309888
5.9. 16.0 Only: Benign
No such file or directory
message during capture of configuration data for a bug report
Description
While the nvidia-bug-report.sh script on is running on the hypervisor host to capture configuration data for a bug report, the following error message is displayed:
sysctl: cannot stat /proc/sys/vm/compaction_proactiveness: No such file or directory
Workaround
Ignore this message as it is benign. The bug report is generated correctly.
Status
Resolved in NVIDIA vGPU software 16.1
Ref. #
4052185
5.10. 16.0 Only: The NVIDIA L40 GPU brand is incorrectly identified if GSP firmware is disabled
Description
If GPU System Processor (GSP) firmware is disabled, the NVIDIA Virtual GPU Manager incorrectly identifies the brand of the NVIDIA L40 GPU. This incorrect identification of the GPU brand might cause performance degradation with some applications that are optimised for features of the NVIDIA L40 that are not available in the incorrect brand. However, the output from the nvidia-smi command is not affected.
This issue occurs only if GPU System Processor (GSP) firmware is disabled. It does not occur if GSP firm is enabled.
Status
Resolved in NVIDIA vGPU software 16.1
Ref. #
4142288
5.11. NVIDIA Control Panel crashes if a user session is disconnected and reconnected
Description
On all supported Windows Server guest OS releases, NVIDIA Control Panel crashes if a user session is disconnected and then reconnected while NVIDIA Control Panel is open.
Version
This issue affects all supported Windows Server guest OS releases.
Status
Open
Ref. #
4086605
5.12. 16.0 Only: Graphics applications are corrupted on some Windows vGPU VMs
Description
Graphics applications are corrupted on Windows VMs that are configured with one or more vGPUs that are based on the NVIDIA Ampere or NVIDIA Ada Lovelace GPU architecture.
Status
Resolved in NVIDIA vGPU software 16.1
Ref. #
3641947
5.13. VM assigned multiple fractional vGPUs from the same GPU hangs
Description
A VM that has been assigned multiple fractional vGPUs from the same physical GPU hangs or becomes inaccessible during installation of the NVIDIA vGPU software graphics driver in the VM. This issue affects only GPUs based on the NVIDIA Turing and NVIDIA Volta GPU architectures. This issue does not occur if the VM has been assigned multiple fractional vGPUs from different physical GPUs.
Version
This issue affects only GPUs based on the NVIDIA Turing and NVIDIA Volta GPU architectures.
Status
Open
Ref. #
4020171
5.14. CUDA profilers cannot gather hardware metrics on NVIDIA vGPU
Description
NVIDIA CUDA Toolkit profilers cannot gather hardware metrics on NVIDIA vGPU. This issue affects only traces that gather hardware metrics. Other traces are not affected by this issue and work normally.
Version
This issue affects NVIDIA vGPU software releases starting with 15.2.
Status
Open
Ref. #
4041169
5.15.
NVIDIA vGPU software
graphics driver for Windows sends a remote call to
ngx.download.nvidia.com
Description
After the NVIDIA vGPU software graphics for windows has been installed in the guest VM, the driver sends a remote call to ngx.download.nvidia.com
to download and install additional components. Such a remote call might be a security issue.
Workaround
Before running the NVIDIA vGPU software graphics driver installer, disable the remote call to ngx.download.nvidia.com
by setting the following Windows registry key:
[HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\NGXCore]
"EnableOTA"=dword:00000000
If this Windows registry key is set to 1 or deleted, the remote call to ngx.download.nvidia.com
is enabled again.
Status
Open
Ref. #
4031840
5.16. On NVIDIA H100, creation of multiple compute instances after deletion of existing compute instances fails
Description
After compute instances are created and deleted on an NVIDIA H100 GPU, creation of multiple instances in a single nvidia-smi command fails. For example, the command nvidia-smi mig -cci 0,1,2 fails with the following error message:
Unable to create a compute instance on GPU 0 GPU instance ID 0 using profile 0: Invalid Argument
Failed to create compute instances: Invalid Argument
Workaround
Create each compute instance in a separate nvidia-smi command, for example:
$ nvidia-smi mig -cci 0
$ nvidia-smi mig -cci 1
$ nvidia-smi mig cci 2
Status
Open
Ref. #
3829786
5.17. NLS client fails to acquire a license with the error
The allowed time to process response has expired
Description
A licensed client of NVIDIA License System (NLS) fails to acquire a license with the error The allowed time to process response has expired
. This error can affect clients of a Cloud License Service (CLS) instance or a Delegated License Service (DLS) instance.
This error occurs when the time difference between the system clocks on the client and the server that hosts the CLS or DLS instance is greater than 10 minutes. A common cause of this error is the failure of either the client or the server to adjust its system clock when daylight savings time begins or ends. The failure to acquire a license is expected to prevent clock windback from causing licensing errors.
Workaround
Ensure that system clock time of the client and any server that hosts a DLS instance match the current time in the time zone where they are located. To prevent this error from occurring when daylight savings time begins or ends, enable the option to automatically adjust the system clock for daylight savings time:
- Windows: Set the Adjust for daylight saving time automatically option.
- Linux: Use the hwclock command.
Status
Not a bug
Ref. #
3859889
5.18. NVIDIA vGPU software graphics driver fails to load on KVM-based hypervsiors
Description
The NVIDIA vGPU software graphics driver fails to load on hypervsiors based on Linux with KVM. This issue affects UEFI VMs configured with a vGPU or pass-through GPU that requires a large BAR address space. This issue does not affect VMs that are booted in legacy BIOS mode. The issue occurs because BAR resources are not mapped into the VM.
On a Windows VM, error code 12 is reported in Device Manager for the vGPU or pass-through GPU.
Workaround
- In virsh, open for editing the XML document of the VM to which the vGPU or GPU is assigned.
# virsh edit vm-name
- vm-name
- The name of the VM to which the vGPU or GPU is assigned.
- Declare the custom libvirt XML namespace that supports command-line pass through of QEMU arguments.
Declare this namesapce by modifying the start tag of the top-level
domain
element in the first line of the XML document.<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
- At the end of the XML document, between the
</devices>
end tag and the</domain>
end tag, add the highlightedqemu
elements.These elements pass the QEMU arguments for mapping the required BAR resources into the VM, setting the MMIO aperture size to 262144. If necessary, replace the value of 262144 with the MMIO aperture size that your VM requires.
</devices> <qemu:commandline> <qemu:arg value='-fw_cfg'/> <qemu:arg value='opt/ovmf/X-PciMmio64Mb,string=262144'/> </qemu:commandline> </domain>
- Start the VM to which the vGPU or GPU is assigned.
# virsh start vm-name
- vm-name
- The name of the VM to which the vGPU or GPU is assigned.
Status
Not an NVIDIA bug
Ref. #
200719557
5.19. With multiple active sessions, NVIDIA Control Panel incorrectly shows that the system is unlicensed
Description
In an environment with multiple active desktop sessions, the Manage License page of NVIDIA Control Panel shows that a licensed system is unlicensed. However, the nvidia-smi command and the management interface of the NVIDIA vGPU software license server correctly show that the system is licensed. When an active session is disconnected and reconnected, the NVIDIA Display Container service crashes.
The Manage License page incorrectly shows that the system is unlicensed because of stale data in NVIDIA Control Panel in an environment with multiple sessions. The data is stale because NVIDIA Control Panel fails to get and update the settings for remote sessions when multiple sessions or no sessions are active in the VM. The NVIDIA Display Container service crashes when a session is reconnected because the session is not active at the moment of reconnection.
Status
Open
Ref. #
3761243
5.20. VP9 and AV1 decoding with web browsers are not supported on Microsoft Windows Server 2019
Description
VP9 and AV1 decoding with web browsers are not supported on Microsoft Windows Server 2019 and later supported releases. This issue occurs because starting with Windows Server 2019, the required codecs are not included with the OS and are not available through the Microsoft Store app. As a result, hardware decoding is not available for viewing YouTube videos or using collaboration tools such as Google Meet in a web browser.
Version
This issue affects Microsoft Windows Server releases starting with Windows Server 2019.
Status
Not an NVIDIA bug
Ref. #
200756564
5.21. nvidia-smi ignores the second NVIDIA vGPU device added to a Microsoft Windows Server 2016 VM
Description
After a second NVIDIA vGPU device is added to a Microsoft Windows Server 2016 VM, the device does not appear in the output from the nvidia-smi command. This issue occurs only if the VM is already running NVIDIA vGPU software for the existing NVIDIA vGPU device when the second device is added to the VM. The nvidia-smi command cannot retrieve the guest driver version, license status, and accounting mode of the second NVIDIA vGPU device.
nvidia-smi vgpu --query
GPU 00000000:37:00.0
Active vGPUs : 1
vGPU ID : 3251695793
VM ID : 3575923
VM Name : SVR-Reg-W(P)-KuIn
vGPU Name : GRID V100D-32Q
vGPU Type : 185
vGPU UUID : 29097249-2359-11b2-8a5b-8e896866496b
Guest Driver Version : 537.13
License Status : Licensed
Accounting Mode : Disabled
...
GPU 00000000:86:00.0
Active vGPUs : 1
vGPU ID : 3251695797
VM ID : 3575923
VM Name : SVR-Reg-W(P)-KuIn
vGPU Name : GRID V100D-32Q
vGPU Type : 185
vGPU UUID : 2926dd83-2359-11b2-8b13-5f22f0f74801
Guest Driver Version : Not Available
License Status : N/A
Accounting Mode : N/A
Version
This issue affects only VMs that are running Microsoft Windows Server 2016 as a guest OS.
Workaround
To avoid this issue, configure the guest VM with both NVIDIA vGPU devices before installing the NVIDIA vGPU software graphics driver.
If you encounter this issue after the VM is configured, use one of the following workarounds:
- Reinstall the NVIDIA vGPU software graphics driver.
- Forcibly uninstall the Microsoft Basic Display Adapter and reboot the VM.
- Upgrade the guest OS on the VM to Microsoft Windows Server 2019.
Status
Not an NVIDIA bug
Ref. #
3562801
5.22. After an upgrade of the Linux graphics driver from an RPM package in a licensed VM, licensing fails
Description
After the NVIDIA vGPU software graphics driver for Linux is upgraded from an RPM package in a licensed VM, licensing fails. The nvidia-smi vgpu -q command shows the driver version and license status as N/A. Restarting the nvidia-gridd service fails with a Unit not found
error.
Workaround
Perform a clean installation of the NVIDIA vGPU software graphics driver for Linux from an RPM package.
-
Remove the currently installed driver.
-
Install the new version of the driver.
$ rpm -iv nvidia-linux-grid-525_535.216.01_amd64.rpm
Status
Open
Ref. #
3512766
5.23. After an upgrade of the Linux graphics driver from a Debian package, the driver is not loaded into the VM
Description
After the NVIDIA vGPU software graphics driver for Linux is upgraded from a Debian package, the driver is not loaded into the VM.
Workaround
Use one of the following workarounds to load the driver into the VM:
- Reboot the VM.
Status
Not a bug
Ref. #
200748806
5.24. The reported NVENC frame rate is double the actual frame rate
Description
The frame rate in frames per second (FPS) for the NVIDIA hardware-based H.264/HEVC video encoder (NVENC) reported by the nvidia-smi encodersessions command and NVWMI is double the actual frame rate. Only the reported frame rate is incorrect. The actual encoding of frames is not affected.
This issue affects only Windows VMs that are configured with NVIDIA vGPU.
Status
Open
Ref. #
2997564
5.25. NVENC does not work with Teradici Cloud Access Software on Windows
Description
The NVIDIA hardware-based H.264/HEVC video encoder (NVENC) does not work with Teradici Cloud Access Software on Windows. This issue affects NVIDIA vGPU and GPU pass through deployments.
This issue occurs because the check that Teradici Cloud Access Software performs on the DLL signer name is case sensitive and NVIDIA recently changed the case of the company name in the signature certificate.
Status
Not an NVIDIA bug
This issue is resolved in the latest 21.07 and 21.03 Teradici Cloud Access Software releases.
Ref. #
200749065
5.26. A licensed client might fail to acquire a license if a proxy is set
Description
If a proxy is set with a system environment variable such as HTTP_PROXY
or HTTPS_PROXY
, a licensed client might fail to acquire a license.
Workaround
Perform this workaround on each affected licensed client.
-
Add the address of the NVIDIA vGPU software license server to the system environment variable
NO_PROXY
.The address must be specified exactly as it is specified in the client's license server settings either as a fully-qualified domain name or an IP address. If the
NO_PROXY
environment variable contains multiple entries, separate the entries with a comma (,
).If high availability is configured for the license server, add the addresses of the primary license server and the secondary license server to the system environment variable
NO_PROXY
. -
Restart the NVIDIA driver service that runs the core NVIDIA vGPU software logic.
- On Windows, restart the NVIDIA Display Container service.
- On Linux, restart the nvidia-gridd service.
Status
Closed
Ref. #
200704733
5.27. Session connection fails with four 4K displays and NVENC enabled on a 2Q, 3Q, or 4Q vGPU
Description
Desktop session connections fail for a 2Q, 3Q, or 4Q vGPU that is configured with four 4K displays and for which the NVIDIA hardware-based H.264/HEVC video encoder (NVENC) is enabled. This issue affects only Teradici Cloud Access Software sessions on Linux guest VMs.
This issue is accompanied by the following error message:
This Desktop has no resources available or it has timed out
This issue is caused by insufficient frame buffer.
Workaround
Ensure that sufficient frame buffer is available for all the virtual displays that are connected to a vGPU by changing the configuration in one of the following ways:
- Reducing the number of virtual displays. The number of 4K displays supported with NVENC enabled depends on the vGPU.
vGPU 4K Displays Supported with NVENC Enabled 2Q 1 3Q 2 4Q 3 - Disabling NVENC. The number of 4K displays supported with NVENC disabled depends on the vGPU.
vGPU 4K Displays Supported with NVENC Disabled 2Q 2 3Q 2 4Q 4 - Using a vGPU type with more frame buffer. Four 4K displays with NVENC enabled on any Q-series vGPU with at least 6144 MB of frame buffer are supported.
Status
Not an NVIDIA bug
Ref. #
200701959
5.28. NVIDIA A100 HGX 80GB vGPU names shown as Graphics Device by nvidia-smi
Description
The names of vGPUs that reside on the NVIDIA A100 80GB GPU are incorrectly shown as Graphics Device by the nvidia-smi command. The correct names indicate the vGPU type, for example, A100DX-40C.
$ nvidia-smi
Mon Jan 25 02:52:57 2021
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 460.32.04 Driver Version: 460.32.04 CUDA Version: 11.2 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 Graphics Device On | 00000000:07:00.0 Off | 0 |
| N/A N/A P0 N/A / N/A | 6053MiB / 81915MiB | 0% Default |
| | | Disabled |
+-------------------------------+----------------------+----------------------+
| 1 Graphics Device On | 00000000:08:00.0 Off | 0 |
| N/A N/A P0 N/A / N/A | 6053MiB / 81915MiB | 0% Default |
| | | Disabled |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+
Status
Open
Ref. #
200691204
5.29. Idle Teradici Cloud Access Software session disconnects from Linux VM
Description
After a Teradici Cloud Access Software session has been idle for a short period of time, the session disconnects from the VM. When this issue occurs, the error messages NVOS status 0x19
and vGPU Message 21 failed
are written to the log files on the hypervisor host. This issue affects only Linux guest VMs.
Status
Open
Ref. #
200689126
5.30. Idle NVIDIA A100, NVIDIA A40, and NVIDIA A10 GPUs show 100% GPU utilization
Description
The nvidia-smi command shows 100% GPU utilization for NVIDIA A100, NVIDIA A40, and NVIDIA A10 GPUs even if no vGPUs have been configured or no VMs are running. A GPU is affected by this issue only if the sriov-manage script has not been run to enable the virtual function for the GPU in the sysfs file system.
[root@host ~]# nvidia-smi
Fri Oct 25 11:45:28 2024
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 535.216.01 Driver Version: 535.216.01 CUDA Version: 12.1 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 A100-PCIE-40GB On | 00000000:5E:00.0 Off | 0 |
| N/A 50C P0 97W / 250W | 0MiB / 40537MiB | 100% Default |
| | | Disabled |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+
Workaround
Run the sriov-manage script to enable the virtual function for the GPU in the sysfs file system as explained in Virtual GPU Software User Guide.
After this workaround has been completed, the nvidia-smi command shows 0% GPU utilization for affected GPUs when they are idle.
root@host ~]# nvidia-smi
Fri Oct 25 11:47:38 2024
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 535.216.01 Driver Version: 535.216.01 CUDA Version: 12.1 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 A100-PCIE-40GB On | 00000000:5E:00.0 Off | 0 |
| N/A 50C P0 97W / 250W | 0MiB / 40537MiB | 0% Default |
| | | Disabled |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+
Status
Open
Ref. #
200605527
5.31. Guest VM frame buffer listed by nvidia-smi for vGPUs on GPUs that support SRIOV is incorrect
Description
The amount of frame buffer listed in a guest VM by the nvidia-smi command for vGPUs on GPUs that support Single Root I/O Virtualization (SR-IOV) is incorrect. Specifically, the amount of frame buffer listed is the amount of frame buffer allocated for the vGPU type minus the size of the VMMU segment (vmmu_page_size
). Examples of GPUs that support SRIOV are GPUs based on the NIVIDIA Ampere architecture, such as NVIDA A100 PCIe 40GB or NVIDA A100 HGX 40GB.
For example, frame buffer for -4C and -20C vGPU types is listed as follows:
- For -4C vGPU types, frame buffer is listed as 3963 MB instead of 4096 MB.
- For -20C vGPU types, frame buffer is listed as 20347 MB instead of 20480 MB.
Status
Open
Ref. #
200524749
5.32. Driver upgrade in a Linux guest VM with multiple vGPUs might fail
Description
Upgrading the NVIDIA vGPU software graphics driver in a Linux guest VM with multiple vGPUs might fail. This issue occurs if the driver is upgraded by overinstalling the new release of the driver on the current release of the driver while the nvidia-gridd service is running in the VM.
Workaround
- Stop the nvidia-gridd service.
- Try again to upgrade the driver.
Status
Open
Ref. #
200633548
5.33. NVIDIA Control Panel fails to start if launched too soon from a VM without licensing information
Description
If NVIDIA licensing information is not configured on the system, any attempt to start NVIDIA Control Panel by right-clicking on the desktop within 30 seconds of the VM being started fails.
Workaround
Restart the VM and wait at least 30 seconds before trying to launch NVIDIA Control Panel.
Status
Open
Ref. #
200623179
5.34. On Linux, the frame rate might drop to 1 after several minutes
Description
On Linux, the frame rate might drop to 1 frame per second (FPS) after NVIDIA vGPU software has been running for several minutes. Only some applications are affected, for example, glxgears. Other applications, such as Unigine Heaven, are not affected. This behavior occurs because Display Power Management Signaling (DPMS) for the Xorg server is enabled by default and the display is detected to be inactive even when the application is running. When DPMS is enabled, it enables power saving behavior of the display after several minutes of inactivity by setting the frame rate to 1 FPS.
Workaround
-
If necessary, stop the Xorg server.
# /etc/init.d/xorg stop
-
In a plain text editor, edit the /etc/X11/xorg.conf file to set the options to disable DPMS and disable the screen saver.
- In the
Monitor
section, set the DPMS option tofalse
.Option "DPMS" "false"
- At the end of the file, add a
ServerFlags
section that contains option to disable the screen saver.Section "ServerFlags" Option "BlankTime" "0" EndSection
- Save your changes to /etc/X11/xorg.conf file and quit the editor.
- In the
-
Start the Xorg server.
# etc/init.d/xorg start
Status
Open
Ref. #
200605900
5.35. DWM crashes randomly occur in Windows VMs
Description
Desktop Windows Manager (DWM) crashes randomly occur in Windows VMs, causing a blue-screen crash and the bug check CRITICAL_PROCESS_DIED
. Computer Management shows problems with the primary display device.
Version
This issue affects Windows 10 1809, 1903 and 1909 VMs.
Status
Not an NVIDIA bug
Ref. #
2730037
5.36. ECC memory settings for a vGPU cannot be changed by using NVIDIA X Server Settings
Description
The ECC memory settings for a vGPU cannot be changed from a Linux guest VM by using NVIDIA X Server Settings. After the ECC memory state has been changed on the ECC Settings page and the VM has been rebooted, the ECC memory state remains unchanged.
Workaround
Use the nvidia-smi command in the guest VM to enable or disable ECC memory for the vGPU as explained in Virtual GPU Software User Guide.
If the ECC memory state remains unchanged even after you use the nvidia-smi command to change it, use the workaround in Changes to ECC memory settings for a Linux vGPU VM by nvidia-smi might be ignored.
Status
Open
Ref. #
200523086
5.37. Changes to ECC memory settings for a Linux vGPU VM by nvidia-smi might be ignored
Description
After the ECC memory state for a Linux vGPU VM has been changed by using the nvidia-smi command and the VM has been rebooted, the ECC memory state might remain unchanged.
This issue occurs when multiple NVIDIA configuration files in the system cause the kernel module option for setting the ECC memory state RMGuestECCState
in /etc/modprobe.d/nvidia.conf to be ignored.
When the nvidia-smi command is used to enable ECC memory, the file /etc/modprobe.d/nvidia.conf is created or updated to set the kernel module option RMGuestECCState
. Another configuration file in /etc/modprobe.d/ that contains the keyword NVreg_RegistryDwordsPerDevice
might cause the kernel module option RMGuestECCState
to be ignored.
Workaround
This workaround requires administrator privileges.
- Move the entry containing the keyword
NVreg_RegistryDwordsPerDevice
from the other configuration file to /etc/modprobe.d/nvidia.conf. - Reboot the VM.
Status
Open
Ref. #
200505777
5.38. Host core CPU utilization is higher than expected for moderate workloads
Description
When GPU performance is being monitored, host core CPU utilization is higher than expected for moderate workloads. For example, host CPU utilization when only a small number of VMs are running is as high as when several times as many VMs are running.
Workaround
Disable monitoring of the following GPU performance statistics:
- vGPU engine usage by applications across multiple vGPUs
- Encoder session statistics
- Frame buffer capture (FBC) session statistics
- Statistics gathered by performance counters in guest VMs
Status
Open
Ref. #
2414897
5.39. Frame capture while the interactive logon message is displayed returns blank screen
Description
Because of a known limitation with NvFBC, a frame capture while the interactive logon message is displayed returns a blank screen.
An NvFBC session can capture screen updates that occur after the session is created. Before the logon message appears, there is no screen update after the message is shown and, therefore, a black screen is returned instead. If the NvFBC session is created after this update has occurred, NvFBC cannot get a frame to capture.
Workaround
Press Enter or wait for the screen to update for NvFBC to capture the frame.
Status
Not a bug
Ref. #
2115733
5.40. RDS sessions do not use the GPU with Microsoft Windows Server as guest OS
Description
When Windows Server is used as a guest OS, Remote Desktop Services (RDS) sessions do not use the GPU. By default, the RDS sessions use the Microsoft Basic Render Driver instead of the GPU. This default setting enables 2D DirectX applications such as Microsoft Office to use software rendering, which can be more efficient than using the GPU for rendering. However, as a result, 3D applications that use DirectX are prevented from using the GPU.
Version
This issue affects all Windows Server releases that are supported as a guest OS.
Solution
Change the local computer policy to use the hardware graphics adapter for all RDS sessions.
-
Choose Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Remote Session Environment.
-
Set the Use the hardware default graphics adapter for all Remote Desktop Services sessions option.
5.41. When the scheduling policy is fixed share, GPU utilization is reported as higher than expected
Description
When the scheduling policy is fixed share, GPU engine utilization can be reported as higher than expected for a vGPU.
For example, GPU engine usage for six P40-4Q vGPUs on a Tesla P40 GPU might be reported as follows:
[root@localhost:~] nvidia-smi vgpu
Mon Aug 20 10:33:18 2018
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 390.42 Driver Version: 390.42 |
|-------------------------------+--------------------------------+------------+
| GPU Name | Bus-Id | GPU-Util |
| vGPU ID Name | VM ID VM Name | vGPU-Util |
|===============================+================================+============|
| 0 Tesla P40 | 00000000:81:00.0 | 99% |
| 85109 GRID P40-4Q | 85110 win7-xmpl-146048-1 | 32% |
| 87195 GRID P40-4Q | 87196 win7-xmpl-146048-2 | 39% |
| 88095 GRID P40-4Q | 88096 win7-xmpl-146048-3 | 26% |
| 89170 GRID P40-4Q | 89171 win7-xmpl-146048-4 | 0% |
| 90475 GRID P40-4Q | 90476 win7-xmpl-146048-5 | 0% |
| 93363 GRID P40-4Q | 93364 win7-xmpl-146048-6 | 0% |
+-------------------------------+--------------------------------+------------+
| 1 Tesla P40 | 00000000:85:00.0 | 0% |
+-------------------------------+--------------------------------+------------+
The vGPU utilization of vGPU 85109 is reported as 32%. For vGPU 87195, vGPU utilization is reported as 39%. And for 88095, it is reported as 26%. However, the expected vGPU utilization of any vGPU should not exceed approximately 16.7%.
This behavior is a result of the mechanism that is used to measure GPU engine utilization.
Status
Open
Ref. #
2227591
5.42. License is not acquired in Windows VMs
Description
When a windows VM configured with a licensed vGPU is started, the VM fails to acquire a license.
Error messages in the following format are written to the NVIDIA service logs:
[000000020.860152600 sec] - [Logging.lib] ERROR: [nvGridLicensing.FlexUtility] 353@FlexUtility::LogFneError : Error: Failed to add trusted storage. Server URL : license-server-url -
[1,7E2,2,1[7000003F,0,9B00A7]]
System machine type does not match expected machine type..
Workaround
This workaround requires administrator privileges.
- Stop the NVIDIA Display Container LS service.
- Delete the contents of the folder %SystemDrive%:\Program Files\NVIDIA Corporation\Grid Licensing.
- Start the NVIDIA Display Container LS service.
Status
Closed
Ref. #
200407287
5.43. nvidia-smi reports that vGPU migration is supported on all hypervisors
Description
The command nvidia-smi vgpu -m shows that vGPU migration is supported on all hypervisors, even hypervisors or hypervisor versions that do not support vGPU migration.
Status
Closed
Ref. #
200407230
5.44. Hot plugging and unplugging vCPUs causes a blue-screen crash in Windows VMs
Description
Hot plugging or unplugging vCPUs causes a blue-screen crash in Windows VMs that are running NVIDIA vGPU software graphics drivers.
When the blue-screen crash occurs, one of the following error messages may also be seen:
-
SYSTEM_SERVICE_EXCEPTION(nvlddmkm.sys)
-
DRIVER_IRQL_NOT_LESS_OR_EQUAL(nvlddmkm.sys)
NVIDIA vGPU software graphics drivers do not support hot plugging and unplugging of vCPUs.
Status
Closed
Ref. #
2101499
5.45. Luxmark causes a segmentation fault on an unlicensed Linux client
Description
If the Luxmark application is run on a Linux guest VM configured with NVIDIA vGPU that is booted without acquiring a license, a segmentation fault occurs and the application core dumps. The fault occurs when the application cannot allocate a CUDA object on NVIDIA vGPUs where CUDA is disabled. On NVIDIA vGPUs that can support CUDA, CUDA is disabled in unlicensed mode.
Status
Not an NVIDIA bug.
Ref. #
200330956
5.46. A segmentation fault in DBus code causes
nvidia-gridd
to exit on Red Hat Enterprise Linux and CentOS
Description
On Red Hat Enterprise Linux 6.8 and 6.9, and CentOS 6.8 and 6.9, a segmentation fault in DBus code causes the nvidia-gridd service to exit.
The nvidia-gridd service uses DBus for communication with NVIDIA X Server Settings to display licensing information through the Manage License page. Disabling the GUI for licensing resolves this issue.
To prevent this issue, the GUI for licensing is disabled by default. You might encounter this issue if you have enabled the GUI for licensing and are using Red Hat Enterprise Linux 6.8 or 6.9, or CentOS 6.8 and 6.9.
Version
Red Hat Enterprise Linux 6.8 and 6.9
CentOS 6.8 and 6.9
Status
Open
Ref. #
- 200358191
- 200319854
- 1895945
5.47. No Manage License option available in NVIDIA X Server Settings by default
Description
By default, the Manage License option is not available in NVIDIA X Server Settings. This option is missing because the GUI for licensing on Linux is disabled by default to work around the issue that is described in A segmentation fault in DBus code causes nvidia-gridd to exit on Red Hat Enterprise Linux and CentOS.
Workaround
This workaround requires sudo privileges.
Do not use this workaround with Red Hat Enterprise Linux 6.8 and 6.9 or CentOS 6.8 and 6.9. To prevent a segmentation fault in DBus code from causing the nvidia-gridd
service from exiting, the GUI for licensing must be disabled with these OS versions.
If you are licensing a physical GPU for vCS, you must use the configuration file /etc/nvidia/gridd.conf.
- If NVIDIA X Server Settings is running, shut it down.
-
If the /etc/nvidia/gridd.conf file does not already exist, create it by copying the supplied template file /etc/nvidia/gridd.conf.template.
-
As root, edit the /etc/nvidia/gridd.conf file to set the
EnableUI
option toTRUE
. -
Start the
nvidia-gridd
service.# sudo service nvidia-gridd start
When NVIDIA X Server Settings is restarted, the Manage License option is now available.
Status
Open
5.48. Licenses remain checked out when VMs are forcibly powered off
Description
NVIDIA vGPU software licenses remain checked out on the license server when non-persistent VMs are forcibly powered off.
The NVIDIA service running in a VM returns checked out licenses when the VM is shut down. In environments where non-persistent licensed VMs are not cleanly shut down, licenses on the license server can become exhausted. For example, this issue can occur in automated test environments where VMs are frequently changing and are not guaranteed to be cleanly shut down. The licenses from such VMs remain checked out against their MAC address for seven days before they time out and become available to other VMs.
Resolution
If VMs are routinely being powered off without clean shutdown in your environment, you can avoid this issue by shortening the license borrow period. To shorten the license borrow period, set the LicenseInterval
configuration setting in your VM image. For details, refer to Virtual GPU Client Licensing User Guide.
Status
Closed
Ref. #
1694975
5.49. VM bug checks after the guest VM driver for Windows 10 RS2 is installed
Description
When the VM is rebooted after the guest VM driver for Windows 10 RS2 is installed, the VM bug checks. When Windows boots, it selects one of the standard supported video modes. If Windows is booted directly with a display that is driven by an NVIDIA driver, for example a vGPU on XenServer, a blue screen crash occurs.
This issue occurs when the screen resolution is switched from VGA mode to a resolution that is higher than 1920×1200.
Fix
Download and install Microsoft Windows Update KB4020102 from the Microsoft Update Catalog.
Workaround
If you have applied the fix, ignore this workaround.
Otherwise, you can work around this issue until you are able to apply the fix by not using resolutions higher than 1920×1200.
- Choose a GPU profile in Citrix XenCenter that does not allow resolutions higher than 1920×1200.
- Before rebooting the VM, set the display resolution to 1920×1200 or lower.
Status
Not an NVIDIA bug
Ref. #
200310861
5.50. GNOME Display Manager (GDM) fails to start on Red Hat Enterprise Linux 7.2 and CentOS 7.0
Description
GDM fails to start on Red Hat Enterprise Linux 7.2 and CentOS 7.0 with the following error:
Oh no! Something has gone wrong!
Workaround
Permanently enable permissive mode for Security Enhanced Linux (SELinux).
- As root, edit the /etc/selinux/config file to set
SELINUX
topermissive
.SELINUX=permissive
- Reboot the system.
~]# reboot
For more information, see Permissive Mode in Red Hat Enterprise Linux 7 SELinux User's and Administrator's Guide.
Status
Not an NVIDIA bug
Ref. #
200167868
Notice
This document is provided for information purposes only and shall not be regarded as a warranty of a certain functionality, condition, or quality of a product. NVIDIA Corporation (“NVIDIA”) makes no representations or warranties, expressed or implied, as to the accuracy or completeness of the information contained in this document and assumes no responsibility for any errors contained herein. NVIDIA shall have no liability for the consequences or use of such information or for any infringement of patents or other rights of third parties that may result from its use. This document is not a commitment to develop, release, or deliver any Material (defined below), code, or functionality.
NVIDIA reserves the right to make corrections, modifications, enhancements, improvements, and any other changes to this document, at any time without notice.
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