I was installing a lot of packages attempting to get a USB 3.0 HDMI video card working, but at some point during the process, I lost the ability to grab window borders, or use the minimize, maximize, close buttons. When hovering over the title bar, the mouse goes form a the default pointer to a the text select cursor. Clicking links and writing text within my browser still works, but is slow and inconsistent.


I tried removing the modules of the new graphics card, and also tried rebooting, neither work. However upon log-in there's some screen tearing before the mouse pointer comes up.

Temporary Fixes

I googled around and found a suggestion that kwin might not be installed and sure enough it wasn't. After installing with apt install kwin and then running kwin. This fixed things for a few hrs.

I started having the same problem again, this time it coincided with my pushing f12 to launch yakuake. Yakuake failed to appear, and I was no longer able to grab title bars or click to close or min/maximize my windows. pkill yakuake fixed the problem.

Strange behavior of F12

I relaunched yakuake and after playing around a bit, I noticed that despite the fact that yakuake wasn't appearing, the problem would go away if I pressed F12 again. It's almost as if a ghost window of of Yakuake was appearing. So I ran an apt purge yakuake in attempt to fix this. Yet before I was able to reinstall I noticed the problem regarding pressing F12 persisted on my main display. Rebooting with yakuake did not change this.

What is happening? How do I fix it?

1 Answer 1


It's a composting issue.

I came across this thread of OpenSUSE users experiencing a very similar issue that also seemed to point toward yakuake. However some of my .xsession-errors pointed to composting issues. When I googled "KDE F12" I discovered the the following sequence will turn on and off composting:

Ctrl Shift F12

Executing this, solved all issues.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.