https://bugs.freedesktop.org/show_bug.cgi?id=43829
--- Comment #11 from Helge Bahmann hcb@chaoticmind.net 2012-09-16 16:00:11 UTC --- (In reply to comment #10)
This should be fixed in my drm-next-3.7-wip branch: http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.7-wip
Just tried on Thinkpad E525 (see bug #54484), and it does *not* fix the issue ( it does however also not wedge the system as 3.6-rc3 did, in case you want would like any data collected or experiments performed).