I have just installed Ubuntu 9.10 on my laptop with an i915 Intel integrated graphics, and OpenGL is now extremely choppy. However, the overall performance is better. On 9.04, I got ~800 FPS on glxgears. Now I get ~3000 FPS!
I only have this problem with Compiz enabled. However, Compiz itself is not choppy at all (and it uses OpenGL).
Everything was working fine on 9.04 with UXA/DRI2 enabled.
Does anyone know what is wrong and how to fix it?