Created attachment 128441 [details] debugger of logout shutdown restart crash diagnosis SUMMARY STEPS TO REPRODUCE 1. after clean install used i normal boot mode without usb live session 2. but same error like in live mode still occurs unable to restart or shutdown computer 3. says that the ksmserver-logout-greeter or whatsoever crashed please restart application OBSERVED RESULT Unable to shutdown or restart computer EXPECTED RESULT Able to shutdown without "long press" power button SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: latest KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kdeclarative/-/merge_requests/37
Git commit 090610124d4650150af49a8e30f6b77ad9803dfe by Nate Graham, on behalf of Piotr Henryk Dabrowski. Committed on 16/12/2020 at 21:35. Pushed by ngraham into branch 'master'. [KQuickAddons] QtQuickSettings::checkBackend() for fallback to software backend Fixes very annoying crashes of QtQuick KDE applications: ksmserver-logout-greeter, krunner (if not running before), and others occuring when the OpenGL driver stops being available (e.g. on upgrade). This issue often occurs after upgrading graphic drivers, preventing reboot, which in turn is needed for the drivers to work and not cause this crash. No changes are required in the above applications, as they all already use KQuickAddons::QtQuickSettings::init(). Related: bug 422995, bug 398199, bug 375913, bug 366156, bug 346519 M +36 -3 src/quickaddons/qtquicksettings.cpp M +2 -1 src/quickaddons/qtquicksettings.h https://invent.kde.org/frameworks/kdeclarative/commit/090610124d4650150af49a8e30f6b77ad9803dfe