SUMMARY Forcible termination of lock screen causes plasmashell to crash, which kills the entire graphical session in KDE Wayland STEPS TO REPRODUCE 1. Run a KDE Wayland session 2. Forcibly terminate the lock screen OBSERVED RESULT The entire GUI session is terminated EXPECTED RESULT The lock screen is terminated SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Plasma Version: 6.3.6 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.1 ADDITIONAL INFORMATION Coupled with https://bugs.kde.org/show_bug.cgi?id=505173, this leads to a chance that an unlock attempt during the passwordless unlock interval leads to a guaranteed failure of entire GUI session
Thank you for the bug report! However Plasma 6.3.6 no longer receives updates or maintenance from KDE; active versions are 6.4 or newer. Please upgrade to an active version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one. If you need help with Plasma 6.3.6, please contact your distribution, who bears the responsibility of providing help for older releases that are no longer receiving updates from KDE. If you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.
Not entirely sure what you expect but the goal is that the session can never be unlocked by crashing or killing the greeter. You probably want to gracefully unlock the system by using loginctl unlock-session