yes!
sudo ppa-purge xorg-edgers solved the problem.
I installed xorg-edgers because of trying to get HDMI port working in my laptop.
I didn't think that would made this sort of problem.
Thank You Timo :)
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete => Fix Released
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https://bugs.launchpad.net/bugs/1253529
Title:
Screen in editors get corrupted
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