Is this page helpful?

On XenServer 7.0, VMs unexpectedly reboot and XenServer crashes or freezes#

Description#

On XenServer 7.0, VMs to which a vGPU is attached unexpectedly reboot and XenServer crashes or freezes.

The event log in the XenServer /var/log/crash/xen.log file lists the following errors:

  • A fatal bus error on a component at the slot where the GPU card is installed

  • A fatal error on a component at bus 0, device 2, function 0

This issue occurs when page-modification logging (PML) is enabled on Intel Broadwell CPUs running XenServer 7.0. Citrix is aware of this issue and is working on a permanent fix.

Workaround#

Disable page-modification logging (PML) as explained in XenServer 7 host crash while starting multiple virtual machines in the Citrix Support Knowledge Center.

Status#

Not an NVIDIA bug

Ref. ##

1853248