https://bugs.kde.org/show_bug.cgi?id=500392
--- Comment #7 from Olivier Fourdan ---
The issue is presumably caused by the use on an RC kernel as Austin pointed out
(comment #3).
Dunno why that works with GNOME, maybe by chance, so please feel free to close
this bug if you reckon this is not KDE
https://bugs.kde.org/show_bug.cgi?id=500392
--- Comment #4 from Olivier Fourdan ---
FTR, If anyone else with the same problem comes across this bug report, a
workaround suggested by Xaver is to set `KWIN_DRM_DEVICES` to point to the
NVIDIA device, e.g.:
```
$ cat /etc/environment
https://bugs.kde.org/show_bug.cgi?id=500392
--- Comment #3 from Olivier Fourdan ---
Actually, Austin Shafer from NVIDIA pointed at
https://github.com/NVIDIA/open-gpu-kernel-modules/issues/788 as being the
issue, basically, the NVIDIA driver does not enable the fbdev options with RC
kernels as
https://bugs.kde.org/show_bug.cgi?id=500392
--- Comment #1 from Olivier Fourdan ---
FWIW, it works in mutter because mutter uses the udev property `boot_vga` to
select the device to use, see `meta_is_udev_device_boot_vga()`:
https://gitlab.gnome.org/GNOME/mutter/-/blob/main/src/backends/meta
https://bugs.kde.org/show_bug.cgi?id=500392
Bug ID: 500392
Summary: kwin fails to start with NVIDIA driver
Classification: Plasma
Product: kwin
Version: 6.3.1
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
