Possibly an issue with the compositor? See http://askubuntu.com/questions/672007/flickering-in-kde-plasma-5-4 where solutions given are:
1. change Compositor Rendering Back-end To OpenGL 3 and then change again to OpenGL 2. 2. Go into System Setting > Hardware > Display and Monitor > Compositor and change the tearing prevention to "Full screen repaints" 3. As an alternative, in the same menu change the compositor to XRender 4. If you'd prefer to not do either of the above, create a script file in /etc/profile.d named kwin.sh (or anything ending .sh really). In that file place the line export KWIN_TRIPLE_BUFFER=1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1450228 Title: plasma screen flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/1450228/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
