The boot process stops immediately with a black screen and the machine being non-responsive. Bisecting between 3.8.2 and 3.8.3 gives Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Sat Dec 1 21:03:22 2012 +0100 drm/i915: reorder setup sequence to have irqs for output setup as the first bad commit. His is on a Thinkpad T510, with an integrated Intel Graphic Chip. This seems to be related to https://lkml.org/lkml/2013/3/14/540
Ok, I think we need to revert this mess and simply give up on ilk rc6 in 3.8 (which was the reason this patch here has been backported). I've just sent a mail to gregkh and the stable team.
3.8.4 boots again. Thanks!