Comment 8 for bug 904476

It turns out the patch was already added to xserver-xorg-video-nouveau 1:1.0.6-0ubuntu2 in Ubuntu 13.04 "Raring Ringtail" ahead of it being committed to the mainline upstream driver - see https://launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau
And just to confirm it's the same patch you can read http://launchpadlibrarian.net/129937213/xserver-xorg-video-nouveau_1%3A1.0.6-0ubuntu1_1%3A1.0.6-0ubuntu2.diff.gz