After upgrade to the kernel driver 495.44 the behavior remains but the error message change to:
[ 295.338952] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.339021] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.339051] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.339081] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.360150] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.360225] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.360264] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.360294] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.380070] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.380138] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.380169] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership [ 295.380198] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
$ cat /proc/driver/nvidia/version NVRM version: NVIDIA UNIX x86_64 Kernel Module 495.44 Fri Oct 22 06:13:12 UTC 2021 GCC version: gcc version 11.2.0 (Ubuntu 11.2.0-7ubuntu2)
$ uname -a Linux mattes-desktop 5.13.0-21-generic #21-Ubuntu SMP Tue Oct 19 08:59:28 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
After upgrade to the kernel driver 495.44 the behavior remains but the error message change to:
[ 295.338952] [drm:nv_ drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership drm_master_ set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
[ 295.339021] [drm:nv_
[ 295.339051] [drm:nv_
[ 295.339081] [drm:nv_
[ 295.360150] [drm:nv_
[ 295.360225] [drm:nv_
[ 295.360264] [drm:nv_
[ 295.360294] [drm:nv_
[ 295.380070] [drm:nv_
[ 295.380138] [drm:nv_
[ 295.380169] [drm:nv_
[ 295.380198] [drm:nv_
$ cat /proc/driver/ nvidia/ version
NVRM version: NVIDIA UNIX x86_64 Kernel Module 495.44 Fri Oct 22 06:13:12 UTC 2021
GCC version: gcc version 11.2.0 (Ubuntu 11.2.0-7ubuntu2)
$ uname -a
Linux mattes-desktop 5.13.0-21-generic #21-Ubuntu SMP Tue Oct 19 08:59:28 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux