[Solved] Mate Desktop Dual Monitor - Fullscreen Stretch

[23306]

Just got my second Montitor few hours ago and without any special settings it's working so far but,
if I set a app or game in fullscreen it streches over both screens. Can I prevent this somehow?

Here is a screenshot how it looks like:
http://www.upload.ee/image/5409187/Screenshot-3.png

[Buffoon]

You need to enable xinerama support.

[23306]

That did the job! Ty!