Created attachment 142209 [details] htop showing drkonqi-coredump-processor processes. SUMMARY Since the last updates today, I am not able to use my KDE Neon developer edition machine anymore, because many drkonqi-coredump-processor processes make it totally unresponsive after a few seconds. These processes appear at a rate of 1Hz. At the same time, I observe a similar amount of sddm-greeter processes appearing, each doing nothing. When I log out fast enough, I can see one additional sddm-greeter process, which is operational and does the login screen. The drkonqi-coredump-processor processes continue to run, until they disappear after 300 seconds. STEPS TO REPRODUCE 1. Log in graphically on KDE Neon developer edition, with a local X session OBSERVED RESULT Every second a process appears and runs at full CPU load: `drkonqi-coredump-processor <long constant hex> <integer, counting up>` EXPECTED RESULT No such processes appear. In case sddm-greeter (or something else) actually crashes and causes these processes to appear, they should not lock up at 100% CPU. SOFTWARE/OS VERSIONS $ ssh -X david@tarja kinfocenter Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.23.80 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.3 Kernel Version: 5.11.0-37-generic (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 4800U with Radeon Graphics Memory: 30.8 GiB of RAM Graphics Processor: llvmpipe $ ssh david@tarja apt show drkonqi Version: 5.22.5+p20.04+tunstable+git20211006.0214-0 $ ssh david@tarja apt show sddm 0.19.0+p20.04+tunstable+git20211004.1953-0
Created attachment 142211 [details] htop showing one of 12 drkonqi-coredump-launcher processes and 3 children. Downgrading drkonqi to 5.22.5+p20.04+tunstable+git20210917.0137-0 does not change anything. Downgrading sddm to 0.18.1-1ubuntu2 does not change anything. I can see 12 inactive processes of drkonqi-coredump-launcher starting at login and quitting at logout. I think this is not related (12 != 300), I cc-ed Frameworks anyway.
Created attachment 142219 [details] Aptitude log of the update which led to this problem. The issue went away itself after installing more updates. I do not know which package may have caused this, neither drkonqi nor sddm were updated. In case this becomes relevant again, I am attaching my aptitude logs.
Created attachment 142220 [details] Aptitude log of the actions which did not change this problem.
Created attachment 142221 [details] Aptitude log of the update which made this problem disappear.