Ubuntu
xorg-server package

  1. Bug #2025320
  2. Comment #4

Comment 4 for bug 2025320

Revision history for this message
Daniel van Vugt (vanvugt) wrote (last edit ): Re: External display sometimes frozen, after logout/login has only black screen.

Thanks. I can see the external display is connected by HDMI to the NVIDIA GPU. And you seem to be using Xorg exclusively so this is a bug between Xorg and the NVIDIA driver.

I think it's likely the issue correlates with these error messages:

[drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to grab modeset ownership

Because that means the NVIDIA driver has lost control of its displays (the external monitor).

As a possible workaround you might like to try adding a kernel parameter:

  nvidia_drm.modeset=0

which should at least disable the code path causing the above error message. But to use Wayland you will need to keep the default (nvidia_drm.modeset=1).