After loging out of a plasma session, there are still processes left over. The list usually contains: kded5 kactivitymanage kglobalaccel5 dconf-service kuiserver5 kio_http_cache_ kwalletd5 The first three can only be quit with SIGKILL. On system shutdown/reboot, systemd is stopped by this. Killing them by hand before make the system shutdown/reboot as expected. Reproducible: Always
I am seeing the same thing here -- the list of dangling processes varies but kded5 usually stays around and needs to be killed with SIGKILL. And also, yes, systemd hangs for the specified timeout value during shutdown/reboot until it successfully kills those processes which is very unfortunate. :-( Those dangling processes are an old issue (see bug 359651 for example) which I have noticed ever since I switched to KDE 5 (which was quite some time ago). But that some of them can only be killed and thus delay the shutdown, that is definitely new. This is seen with Qt 5.6 (w/ the qtdbus fix for the spy stuff), KDE Frameworks 5.20.0 and Plasma 5.6 on an uptodate Gentoo ~amd64 system. If there is anything more I can do to help diagnose this further, please let me know.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!