Comment 32 for bug 999910

Timo, I'm building a test kernel with this patch committed in 3.3.5:

http://permalink.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/10832

I don't see it in 3.2.0-25 and the description appears relevent - the patch applies a GPU hang fix for gen 6 (Sandy Bridge) to >= gen 6 (gen 7 including Ivy).

I don't have a hang from the session menu on our Ivy Bridge hardware. Only either random hangs - or, as mentioned, it's pretty easy to cause by quickly scrolling up and down in Google Search image results - takes up to a couple minutes. The scrolling clue came from here:

http://partiallysanedeveloper.blogspot.com/2012/05/ivy-bridge-hd4000-linux-freeze.html

Some System76 users followed these directions and haven't seen the freezes since.