[ubuntu] Choppy full screen video

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http://ubuntuforums.org – I'm using Ubuntu 12.04 LTS, and while using Ubuntu (unity 3d) full screen video playback is very choppy. This includes, VLC, movie player, and to a lesser extent youtube videos. However, not all video playback is choppy: smaller-sized or windowed videos run smoothly. Even almost fully maximized videos in VLC play smoothly, but as soon as you make it 'full screen' there is significant choppiness. Not unwatchable, but definitely not suited for serious video watching. I usually have to switch to another OS to watch videos. I dualboot with Windows 7, and it plays videos of all size smoothly. (Hardware)