https://bugs.freedesktop.org/show_bug.cgi?id=50655
--- Comment #7 from Bryan Quigley BryanQuigley@Ubuntu.com 2012-06-04 18:50:08 UTC --- Just upgrading Mesa (which does pull in libdrm upgrades) causes the bug.. even on the 3.2 kernel without Xorg/Drivers upgraded... I think this confirms it is mesa bug..