According to triage in https://bugs.kde.org/show_bug.cgi?id=201569 this bug is caused by KNotify trying to play the logout sound even though the sound system has been turned of for notifications. This causes the logout/shutdown/rebott procedure to hang.
Using the default settings or removing the logout sound in System Settings will work around the issue. A patch has been prepared (see comment #23 in the abovementioned bugreport). -- [karmic] Unable to logout/reboot/shutdown from within KDE https://bugs.launchpad.net/bugs/410466 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kde4libs in ubuntu. -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs