Comment 68 for bug 278471

I can confirm that killing krunner fixes this, disabling KRandR does not. Also, the bug only seems to occur while the mouse is moving (screen blinks every ~3 seconds). In general it only blinks occasionally if the mouse is motionless, even if the keyboard is being used. After adding a script to ~/.kde/Autostart/ that executes `pkill krunner`, it now only seems to blink a few times while KDE is starting up.

Does anyone know what it is about krunner that causes this?

Also, this bug seems to be mainly about the KRandR issue. Should a separate bug be filed for the krunner issue?