Hello, now using Nvidia proprietary driver version 470.82.00, kernel 5.14.0-2-amd64 (distribution Debian bookworm/sid). Also using GNOME and media players with PRIME render offload. The issue is still there:
$ sudo dmesg |grep "Failed to lookup NVKMS gem object" |wc -l
67
The 67 messages are for a relatively short uptime of a few hours. By the way, it seems I’m not the only one seeing this error message, for instance see this thread or this one. Is there a threshold over which we can expect some feedback ?