This is rather unrelated - although this bug has become a general "I perceive a problem" dumpster anyway.
The original report actually sounds a lot like related to bug #340294 The we have some reports which are likely related to the stale lock file bugs in KConfig & Qt: https://codereview.qt-project.org/#/c/110346/ and https://git.reviewboard.kde.org/r/122549/ Then we've complete freezes of the X11 server Finally there're some "kwin artifacts after" issues - this matches yours and I bet your right arm that you've an nvidia GPU - the invalidated vertext buffers will more likely relate to te switch to VT1 than anything else (run "dmesg | grep NVRM" and check whether it says something about unspported framebuffer consoles, but this lately was reported regardless) VLC will likely require 100% cpu because it (or rather the driver) is performing a busy wait for the next vblank signal (which is not gonna occur) The most simple resolution of invalidated vertex buffers is to restart the compositor (press SHIFT+Alt+F12 twice) -- 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
