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
Severity: crash
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: ofour...@redhat.com
Target Milestone: ---
SUMMARY
kwin 6.3.1 fails to start on a Fedora 42 installation with the NVIDIA driver:
```
kwin_core: Failed to open drm node: ""
kwin_scene_opengl: couldn't find dev node for drm device
kwin_scene_opengl: No render nodes have been found, falling back to primary
node
kwin_scene_opengl: 0x502: GL_INVALID_OPERATION error generated. <image> and
<target> are incompatible
kwin_wayland_drm: Failed to create framebuffer: Invalid argument
kwin_wayland_drm: Failed to create framebuffer: Invalid argument
```
STEPS TO REPRODUCE
1. Install Fedora 42
2. Enable RPMfusion and install NVIDIA proprietary driver
3. Log in KDE Plasma
OBSERVED RESULT
Screen stays black.
EXPECTED RESULT
KDE session starts.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 6.3.1-1.fc42.x86_64
KDE Frameworks Version: kf6-frameworkintegration-6.11.0-1.fc42.x86_64
Qt Version: 6.8.2-1.fc42.x86_64
ADDITIONAL INFORMATION
GNOME Shell as a Wayland compositor works fine on that exact same setup.
```
s -l /dev/dri/
total 0
drwxr-xr-x. 2 root root 100 Feb 19 11:56 by-path
crw-rw----+ 1 root video 226, 0 Feb 19 11:56 card0
crw-rw----+ 1 root video 226, 1 Feb 19 11:56 card1
crw-rw-rw-. 1 root render 226, 128 Feb 19 11:56 renderD128
```
card0 is simpledrm and card1 is nvidia:
```
$ ls -l /sys/class/drm/card0/device/driver/
total 0
--w------- 1 root root 4096 Feb 19 12:15 bind
lrwxrwxrwx 1 root root 0 Feb 19 12:15 simple-framebuffer.0 ->
../../../../devices/pci0000:51/0000:51:01.0/0000:52:00.0/simple-framebuffer.0
--w------- 1 root root 4096 Feb 19 2025 uevent
--w------- 1 root root 4096 Feb 19 12:15 unbind
$ ls -l /sys/class/drm/card1/device/driver/
total 0
lrwxrwxrwx 1 root root 0 Feb 19 12:15 0000:52:00.0 ->
../../../../devices/pci0000:51/0000:51:01.0/0000:52:00.0
--w------- 1 root root 4096 Feb 19 12:15 bind
lrwxrwxrwx 1 root root 0 Feb 19 12:15 module -> ../../../../module/nvidia
--w------- 1 root root 4096 Feb 19 12:15 new_id
--w------- 1 root root 4096 Feb 19 12:15 remove_id
--w------- 1 root root 4096 Feb 19 12:15 uevent
--w------- 1 root root 4096 Feb 19 12:15 unbind
```
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