This commit from intel-drm-staging fixes an oops for me when docking my system. Can it be added to 2.6.39?
commit c60001b9921a869c7dc916e72a22c5805cc562ae Author: Chris Wilson chris@chris-wilson.co.uk Date: Fri Apr 22 10:47:08 2011 +0100
drm: Take lock around probes for drm_fb_helper_hotplug_event