Similar symptoms experienced here on Kubuntu 15.10; occasionally (but not always) when I click shutdown or log off, the system doesn't exit, ksmserver goes to 100% CPU and system become unresponsive (or very very slow to open a new window).
Could this be related to KDE bug 328571 ? https://bugs.kde.org/show_bug.cgi?id=328571 ** Bug watch added: KDE Bug Tracking System #328571 https://bugs.kde.org/show_bug.cgi?id=328571 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1465866 Title: Can't terminate session after a while To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/1465866/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
