Hi,
I have Ubuntu 20.04 installed, and I'm using the provided Xen package: xen-hypervisor-4.11-amd64
Xen boots as expected, but I can't get my Gnome desktop, since the X server fails to start.
Looking at the journalctl logs, I can see the errors related the Gnome:
/usr/lib/gdm3/gdm-x-session[1962]: Unable to run X server
And a few lines before, an error related to Nvidia:
/usr/lib/gdm3/gdm-x-session[1966]: (WW) NVIDIA: Failed to bind sideband socket to
/usr/lib/gdm3/gdm-x-session[1966]: (WW) NVIDIA: '/var/run/nvidia-xdriver-66ed5ce3' Permission denied
/usr/lib/gdm3/gdm-x-session[1966]: (II) NVIDIA: Using 24576.00 MB of virtual memory for indirect memory
/usr/lib/gdm3/gdm-x-session[1966]: (II) NVIDIA: access.
/usr/lib/gdm3/gdm-x-session[1966]: (EE) NVIDIA(0): Failed to allocate software rendering cache surface: out of
/usr/lib/gdm3/gdm-x-session[1966]: (EE) NVIDIA(0): memory.
/usr/lib/gdm3/gdm-x-session[1966]: (EE) NVIDIA(0): *** Aborting ***
/usr/lib/gdm3/gdm-x-session[1966]: (EE)
/usr/lib/gdm3/gdm-x-session[1966]: Fatal server error:
/usr/lib/gdm3/gdm-x-session[1966]: (EE) NVIDIA: A GPU exception occurred during X server initialization
I can also see a GPU MMU fault in dmesg:
kernel: NVRM: Xid (PCI:0000:01:00): 31, pid=285, Ch 00000008, intr 00000000. MMU Fault: ENGINE GRAPHICS HUBCLIENT_FE faulted @ 0x0_00000000. Fault is of type FAULT_PDE ACCESS_TYPE_VIRT_WRITE
In a normal boot I don't have these errors (with nouveau or nvidia driver),
so it's safe to assume that Xen is doing something that the drivers were not prepared for.
I'm using the latest drivers available: nvidia-440
Have you already seen this error before ?
Any ideas how to fix this issue ?
Do you have contacts at Nvidia who could help ?
Best regards,
Mathieu Tarral
