https://bugs.kde.org/show_bug.cgi?id=524540
--- Comment #6 from [email protected] --- Additional information regarding the issue: I have found a reliable workaround. If I physically unplug and replug the DisplayPort cable (hot-plug) while the session is running, KWin fully recovers. The freezes stop entirely, and right-clicking on the desktop works perfectly. Comparing the drm_info output between the frozen state and the working hot-plugged state reveals a specific difference in the hardware color management registers for the active CRTC (CRTC 0) and Plane (Plane 0): In the frozen state: NV_CRTC_REGAMMA_DIVISOR and NV_PLANE_DEGAMMA_MULTIPLIER are stuck at 0. In the working state: NV_CRTC_REGAMMA_DIVISOR and NV_PLANE_DEGAMMA_MULTIPLIER are correctly set to 4294967296. This suggests the atomic commit failure is triggered by uninitialized (zeroed) gamma/degamma divisor registers during the initial boot sequence with the NVIDIA DRM driver, which are properly flushed and reinitialized upon an HPD (Hot-Plug Detect) event. -- You are receiving this mail because: You are watching all bug changes.
