SUMMARY Sometimes, when using an NVIDIA GPU, kscreenlocker freezes on unlock. It eventually unfreezes and can be unlocked. When this happens, the following error messages are logged: QRhiGles2: Context is lost. Graphics device lost, cleaning up scenegraph and releasing RHI STEPS TO REPRODUCE Not exactly reproducible, but follows a pattern: in an interval between reboots, it either occurs on every unlock or doesn't occur at all OBSERVED RESULT kscreenlocker freezes temporarily and then unfreezes EXPECTED RESULT kscreenlocker doesn't freeze SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0 ADDITIONAL INFORMATION Occurs with NVIDIA 4060 Ti. Doesn't occur with AMD
If it only happens on NVIDIA, then unfortunately it's an NVIDIA driver bug. It's really unfortunate that the bug is severe enough to brick the lock screen. But that's the risk of using NVIDIA, I'm afraid. :( Please report this issue to the NVIDIA folks, either by sending an email to linux-bugs@nvidia.com or making a post at https://forums.developer.nvidia.com/c/gpu-graphics/linux. It would be helpful to the NVIDIA developers if you could run `nvidia-bug-report.sh` and attach the resulting file in your report. Thanks!