If you can move to another VT it's unlikely required to reboot the system. First try to suspend the compositor (SHIFT+Alt+F12), notably if *everything* hangs (visually, you can actually inspect the condition of random processes from the other VT)
If that "helps", resume it (same shortcut), obtain the output of qdbus org.kde.KWin /KWin supportInformation and file a new bug. Be reminded that this bug will *never* fix since it turned into a random "something doesn't work" report mess. -- 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
