Created attachment 115362 [details] "journalctl -p 2 -b" output SUMMARY Sometimes at boot kwin_x11 throws "Freeze in OpenGL initialization detected" and disables compositing (with OpenGL x.y compositing enabled in systemsettings). This happens apparently in a random fashion. I am using the default user configuration files in /home. I put the journalctl log in the attachment. This error never happened to me before, but I can't recall which change triggered the error. I recently updated Plasma, though. Clicking "Re-enable OpenGL compositing" in systemsettings and relaunching kwin effectively re-enables compositing. STEPS TO REPRODUCE 1. Enable OpenGL (whatever version) compositing under System Settings > Composer 2. Restart 3. Launch a Plasma X11 session in sddm OBSERVED RESULT No compositing, sometimes kwin_x11 doesn't even start. EXPECTED RESULT Compositing working SOFTWARE VERSIONS (available in About System) KDE Plasma Version: 5.13.5 KDE Frameworks Version: 5.50.0 Qt Version: 5.11.2 ADDITIONAL INFORMATION I am using up-to-date Arch Linux, kernel version 4.18.10-arch1-1-ARCH, 64 bit, xorg intel drivers version 2.99.917 and mesa 18.2.1-1
Just reproduced this today. Seems like it is a 5% chance, and requires an HDD or slow storage medium to increase probability of reproduction. It could be that the compositor indeed freezes because everything else is loading at the same time and it strains the disk that it causes KWin to issue a false-positive and disable compositing...
This bug was reported against an outdated version of KWin. We have made many changes since the. If the issue persists in newer versions can you reopen the bug report updating the version number.