I'm not sure that the crash happens when there are are some windows open. I tried and it is not so for me. I tried with an other user, and same issue. I solved this problem with purge kubuntu-default-settings If reinstall this package the issue returns
-- knotify4 crashes while system turn off https://bugs.launchpad.net/bugs/290083 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs