Comment 31 for bug 416073

After a little testing, it does seem that the culprit (in my case) is xserver-xorg-video-intel-2.8. I reverted to 2.4 and things were definitely improved, but there were obvious side-effects to reverting.

Oddly enough, running glxgears reports a better frame rate under 2.8, but is definitely choppy, whereas 2.4 gave a lower frame rate, but was not choppy.

I'm just going by the overall "feel" of things, so I apologize for the lack of concrete data on this. I'm more than willing to provide more information if it'd be beneficial.