SUMMARY When I try to enable HDR in the screen, it hangs for a few seconds and returns the error - applying config failed! The driver rejected the output configuration STEPS TO REPRODUCE 1. Try to enable HDR. OBSERVED RESULT Hangs for a few seconds and returns with an error. EXPECTED RESULT To work, as it have for other screens. SOFTWARE/OS VERSIONS KDE Plasma Version: 6.4.5 KDE Frameworks Version: 6.19.0 Qt Version: 6.10.0 ADDITIONAL INFORMATION https://www.dropbox.com/scl/fi/3fmv5sybtvnb5m6v2s2we/2025-10-18_10-12-18.mp4?rlkey=7zhq76q0p30gg5pug2jeu9bkl&st=e3pttjwl&dl=0 I see many of this in the logs, not sure if related. Could be, because there is no other reason. kwin_wayland[2335]: 0x502: GL_INVALID_OPERATION error generated. <image> and <target> are incompatible kwin_wayland[2335]: Invalid framebuffer status: "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT" kwin_wayland[2335]: Checking test buffer failed! kwin_wayland[2335]: The main thread was hanging temporarily!
Please report this to your driver vendor. Judging by the warnings I assume this is NVidia, so you can report it at https://forums.developer.nvidia.com/c/gpu-graphics/linux