Window dragging lag when rendering 3d objects. (GNOME 42, NVIDIA, glxgear, pymol)

[Xiaoguang Xue]

OS/software: Ubuntu Jammy Jellyfish (development branch), GNOME 42.beta, X11, NVIDIA-driver-510 (510.54)
Hardware: Intel® Xeon(R) CPU E5-1650 v2 @ 3.50GHz × 12, 31,3 GiB RAM, NVIDIA Corporation GP106 [GeForce GTX 1060 6GB]

How to reproduce: open glxgear, on the same workspace, move any window, there is badly dragging lag. But there is no lag if move window on a different workspace. CPU/GPU usages are normal (<3%).

Disable Sync to VBlank in NVIDIA Settings can solve this issue, but CPU/GPU usages are abornmally high (single core CPU>80%, GPU>10% only for glxgear).

Both NVIDIA-driver-510 and NVIDIA-driver-470 have the same issue. But another Intel-GPU based laptop works fine.

This is not a glxgear bug, as other realtime 3D rendering (PyMOL, Blender...) casue the same issue.

Possible reasons I guess: NVIDIA driver bug, kernel bug, or GNOME 42 bug.

[Xiaoguang Xue (cygx1xue)]

Many error messages:
[drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000400] Failed to grab modeset ownership

[Xiaoguang Xue (cygx1xue)]

Other DEs (xfce, icewm, and fvwm) do NOT have such issues. I guess this might be a gnome related bug.

[Daniel van Vugt (vanvugt)]

This sounds like a continuation of Nvidia bug 1799679.

Please test regular Ubuntu 22.04 (GNOME 41) and/or Ubuntu 21.10 (GNOME 40) and tell us if the same problem exists there. I just want to confirm it's not a new problem in GNOME 42 here.

[Daniel van Vugt (vanvugt)]

Also, when the problem is happening please run:

  apport-collect 1964675
  sudo apt install mesa-utils
  glxinfo > glxinfo.txt
  xrandr --verbose > xrandr.txt
  lspci -k > lspci.txt
  journalctl -b0 > journal.txt

and attach the resulting text files here.

When reporting new bugs in the future please use the 'ubuntu-bug' command.