https://bugs.kde.org/show_bug.cgi?id=511646
--- Comment #5 from [email protected] --- Final Technical Details for Bug Report (English) The issue is definitively traced to an enumeration failure within the KWin DRM backend (kwin_wayland_drm) when the system is running the NVIDIA proprietary driver in a modern, clean configuration. A. Observed System State (Intentional Configuration): Driver: NVIDIA Proprietary Driver (Version: 580.105.08). Kernel Parameter: nvidia-drm.fbdev=0 is used to disable the creation of the legacy VESA framebuffer device. Result: The primary DRM device, /dev/dri/card0, is non-existent. The sole active GPU is correctly registered as /dev/dri/card1. B. KWin Failure Evidence (Core Bug): KWin fails to initialize because it attempts to open the first DRM device rigidly at /dev/dri/card0 and fails, despite the presence of /dev/dri/card1. Proof from user session log: nov 06 22:15:28 james-computer kwin_wayland[1360]: kwin_wayland_drm: failed to open drm device at "/dev/dri/card0" Conclusion: The KWin DRM backend logic must be updated to correctly handle the ENOENT error when probing a non-existent /dev/dri/card0 and continue the probe with the next available device (i.e., /dev/dri/card1), rather than aborting the session. -- You are receiving this mail because: You are watching all bug changes.
