Created attachment 184931 [details] Backtrace: coredumpctl debug plasmashell -A "-ex bt -ex quit" SUMMARY: see $SUBJECT 100% repeatable, happens daily since about a week ago. Computer hardly usable. STEPS TO REPRODUCE 1. Start computer with KDE and autologin 2. Watch panel appear & disappear a few times with "drkonqi" windows appearing 3. Then, only a mouse cursor on a black screen remains. I can log out (power button) and restart, but nothing else. 4. With some luck, on the second login attempt it doesn't crash. (like now as I'm typing this) OBSERVED RESULT See above EXPECTED RESULT KDE should start up normally. If there is some configuration corruption or leftover temp files or something, Plasmashell should be robust enough to deal with this cleanly. Last line of attached backtrace: #44 0x00005f2cf4c89638 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/plasma-workspace-4:6.4.4-0zneon+24.04+noble+release+build48/shell/main.cpp:188 SOFTWARE/OS VERSIONS: (from Info center) KDE Neon 6.3 with KDE Plasma 6.4.4 and all current updates installed. Operating System: KDE neon User Edition KDE Plasma Version: 6.4.4 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.2 Kernel Version: 6.14.0-29-generic (64-bit) Graphics Platform: Wayland Processors: 20 × 13th Gen Intel® Core™ i7-1370P Memory: 32 GiB of RAM (31.0 GiB usable) Graphics Processor: Intel® Iris® Xe Graphics Manufacturer: LENOVO Product Name: 21HJS06H00 System Version: ThinkPad T16 Gen 2 ADDITIONAL INFORMATION In case this is relevant - my bottom task panel contains (L->R) the following widgets: virtual desktops, CPU, RAM & Temperature load, app starter, icon only taskbar, notification area, clock, "show desktop" icon. This has been going on for some time, at least since 6.4.3.
Update: the series of endless crashes also happens after a resume from standby. The crash series stopped after I removed the system monitor widgets from my taskbar. Something in there was majorly broken, it seems. Using the supplied backtrace, is this tracable to the system monitor widget?
Created attachment 184953 [details] new backtrace using coredumpctl Update: Upgrading to Plasma 6.4.5 does not fix this problem, nor does removing and reconfiguring the system load widget on the taskbar (which I had suspected). Crashes keep happening until I have >20 drkonqi processes trying to generate backtraces in parallel and /tmp is full (1.5GB) which basically grinds the system to a complete halt. There should be a maximum number of parallel drkonqi processes allowed to run. New backtrace attached.
Update: This happens also on an X11 session, so it does not seem to be Wayland related.
Removing plasmashellrc plasma-org.kde.plasma.desktop-appletsrc in ~/.config - and reconfiguring the panel with my favorite settings, but without any extra applets - seems to fix the issue until the next restart, but then the crashes happen again. I am now keeping the configuration default as is after removing the above two files, no additional applets, and will report back when/if it crashes again.
Thank you for the bug report. I'm not able to reproduce this on git-master. Unfortunately the backtrace is incomplete and missing debug symbols for the following lines that we need to figure out exactly what's going wrong: #14 0x000077b0fa546e39 n/a (libQt6Core.so.6 + 0x346e39) #10 0x000077b0fb8e1225 n/a (libQt6Qml.so.6 + 0x4e1225) #20 0x000077b0fbebdf5b n/a (libQt6Quick.so.6 + 0x4bdf5b) #4 0x000077b0f2fe10da n/a (libQt6QuickTemplates2.so.6 + 0x1e10da) #31 0x0000604af1e47638 n/a (plasmashell + 0x3d638) Could you please install debug packages and attach a new symbolicated backtrace generated by using `coredumpctl gdb` in a terminal window? See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl for details about how to do this. Thanks again!
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I'd love to install the debug symbols. Please tell me how specifically to do this for KDE Neon. The website lists a debug server which doesn't (seem to) provide the correct info, drkonqi tries to download "additional information" (debug symbols) but never finishes, and the Ubuntu dbgsym server provides libqt6 6.4, while Neon uses v6.9. Please tell me how specifically to do this for KDE Neon for the qt6 packages which require it. Thank you!
*** This bug has been marked as a duplicate of bug 509192 ***