That sounds like a stalled kwin process. Please file a new bug and there attach the output of qdbus org.kde.KWin /KWin supportInformation
(obtain it while the compositor is running "ok" - you can toggle the compositor anytime with SHIFT+Alt+F12) Also, if possible obtain and attach a backtrace for the stalled kwin process, according to https://community.kde.org/KWin/Debugging (but first just file the bug with teh information instantly available) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1440210 Title: KWin crashes multiple times a day and often has to be restarted manually. To manage notifications about this bug go to: https://bugs.launchpad.net/kdebase-workspace/+bug/1440210/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
