When I play Unreal Tournament on my system (Windows version through Wine), the game plays great and very well. However, when I quit the game, dragging windows around and videos in Unity, no longer have VSync, and shows tearing. Logging out and back in always fixes it.
In CCSM Vsync is on. Toggling it off and on in the OpenGL section doesn't help.
I am using a Radeon 4870 with Ubuntu 13.10 so only the open source driver is an option for me.
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