I suspect you have the same behaviour as I do ie: kwin crashes and is not restarted.
when you experience a crash try the following: - go to console mode (CTRL-ALT-F1) - log in with your kde user and do this : $ export DISPLAY=:0 <ENTER> $ kwin <ENTER> - go back to graphic mode with ALT-F7 all should return back to normal. If this fixes your problem then I can confirm your bug and kwin is the culprit, you'll have a kwin crash window somewhere when going back to X. -- randomly exits https://launchpad.net/bugs/53803 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs