Intel GM956 performance regression in 11.10?

[Marius Gedminas]

Has anyone else noticed a considerable performance regression in Intel
GM956 graphics after an upgrade from 11.04 to 11.10?

When I drag terminal windows around on my screen the position updates at
what feels like ~6 fps. The compiz workspace sliding animation on
Ctrl+Alt+Left/Right sometimes drops *all* the intermediate frames. I can
sometimes see *tearing* when I'm scrolling text in less in a
gnome-terminal!

I use Unity (and have used in in 11.04).

Marius Gedminas
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