https://bugs.freedesktop.org/show_bug.cgi?id=58667
--- Comment #25 from Thomas Rohloff v10lator@myway.de --- (In reply to comment #24)
I'll bisect between 3.7 and 3.8-rc1 and see if I end up at the same thing.
Maybe you should just compile http://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-3.8&id=dd54f... (bad) and http://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-3.8&id=9d89d... (good). It would be faster than bisecting and if you get another result than me you can still do a full bisect afterwards.