*** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports Please remove this comment after reading and before submitting - thanks! *** SUMMARY STEPS TO REPRODUCE 1. Boot computer 2. Login 3. OBSERVED RESULT Screen is black (no desktop background or icons but cursor and bottom panel is available. EXPECTED RESULT Desktop with wallpaper and icons available to be activated SOFTWARE/OS VERSIONS Windows: macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: Operating System: Kubuntu 24.04 KDE Plasma Version: 5.27.12 KDE Frameworks Version: 5.115.0 Qt Version: 5.15.13 Kernel Version: 6.8.0-55-generic (64-bit) Graphics Platform: offscreen Processors: 8 × Intel® Core™ i7-3770 CPU @ 3.40GHz Memory: 7.7 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 4000 ADDITIONAL INFORMATION Unfortunately this is an intermittent problem on a tower hardware system (not a laptop) with dual monitors plugged in but one is turned off (I have tried working with the spare monitor disabled and enabled bu there's no change in behavior). The active monitor is a Dell 1704FPV at 1280x1024. Waiting after login doesn't help. If I immediately log out and back in then everything is fine. I have disabled ~/.config/autostart (it's empty, as a precaution I have added the Immutable attribute to the directory to prevent anything from creating files there in the background) because I read a web post stating that solved someone else's problem (but not for me). Kalarm is configured and somehow auto starts anyway. I did remove ~/.config/plasma-org.kde.plasma.desktop-appletsrc because a web post indicated that solved their problem (but, again, not for me). I AM WILLING TO CHECK CONFIGURATION, ETC VIA A CONSOLE TERMINAL IF I KNOW WHAT TO LOOK FOR - just contact me. I'm a Linux system's administrator and am comfortable in a terminal environment.
This may be related to bug 496926 but is a different environment.
After trying to figure it out, I managed to fix it after deleting the maliit-keyboard package and the file /etc/sddm.conf.d/plasma-wayland.conf. If the system uses only a wayland session, then there are no crashes or black screen issues at all after exiting the session. But if the system uses a wayland session and an x11 session, then when exiting the session, it happens that instead of the login screen, there is just a black screen. The problems started after the release of plasma-6.3.x. After deleting maliit-keyboard and maliit, as well as the file /etc/sddm.conf.d/plasma-wayland.conf, I no longer see a black screen after exiting the session.
*** This bug has been marked as a duplicate of bug 494262 ***