https://bugzilla.kernel.org/show_bug.cgi?id=43353
--- Comment #1 from WorMzy Tykashi wormzy.tykashi@gmail.com 2012-06-23 17:47:27 --- Same problem. Only seems to affect GTX 560 chipsets.
Can confirm that re-adding crtc_id back to struct drm_fb_helper_crtc in include/drm/drm_fb_helper.h fixes the problem.