Bug#1089513: workaround

[junk mail]

I am on the testing release, and use KDE. linux: 6.12.6-1; nvidia-driver 535.216.03. The problem I was experiencing is that I couldn't change the display resolution nor refresh rate. These issues occurred after updating the Linux kernel, everything still works fine on 6.11, so I assume this is related to this bug.

I looked a bit more into it, missing config files seem to be causing issues. Initializing config files using the deprecated nvidia-xconfig, which can be removed afterwards, resolved it:
```
sudo apt install nvidia-xconfig
sudo apt nvidia-xconfig
sudo apt purge nvidia-xconfig
sudo reboot
```

The warning in dmesg appears to remain unchanged though:
WARNING: CPU: 4 PID: 1076 at drivers/gpu/drm/drm_file.c:312 drm_open_helper+0x132/0x150 [drm]
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