Nvidia RTX A2000 + Nvidia A30 - Phantom display

[filippo.copetti]

I’m working on a system with a Nvida RTX A2000 and a Tesla A30 , Ubuntu 20-04.
I’m having troubles since a second phantom display is detected, connected to VGX of A30.

[ 7.429969] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:69:00.0 on minor 1 //A2000
[ 7.430091] [drm] [nvidia-drm] [GPU ID 0x00006a00] Loading driver
[ 9.641843] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:6a:00.0 on minor 2 //A30

This is also visible from the nvidia-settings.

How can I permanently disable this VGX feature of the A30?
I can somehow workaround this issue by disabling the display with xrandr but this works only after boot.

[generix]

Please try with a minimal xorg.conf

Section "Device"
  Identifier "nvidia"
  Driver "nvidia"
  BusID "PCI:105:0:0"
  Option "ProbeAllGpus" "false"
EndSection

[filippo.copetti]

dump.zip (190.8 KB)
Hi, Thanks for the suggestion, unfortunately it didn’t help. With this configuration I can’t even see the displays in the nvidia-settings tabs and can’t login in the system, while before, blindly I was able to do that.

Attached the dump with this xorg.conf

Thanks,
Filippo

[generix]

Please run nvidia-bug-report.sh as root and attach the resulting nvidia-bug-report.log.gz file to your post.

[filippo.copetti]

nvidia-bug-report.log.gz (874.9 KB)
Here it is, thank you

[generix]

Please try this xorg.conf:

Section "ServerFlags"
  Option "AutoAddGPU" "off"
EndSection

Section "Device"
  Identifier "nvidia"
  Driver "nvidia"
  BusID "PCI:105:0:0"
  Option "ProbeAllGpus" "false"
EndSection

Afterwards, please create a new nvidia-bug-report.log

[filippo.copetti]

It worked like a charm! thank you very much! here attached the bug report.

Thanks again,
Filippo
nvidia-bug-report.log.gz (967.4 KB)