Comment 53 for bug 749817

Alright, well it is an experimental kernel and likely has its own new bugs it brings, but we should stay focused on the original black screen issue. (If you feel motivated, upstream would probably like to hear about those other issues you found though - file at bugs.launchpad.net against Xorg/Intel.)

Anyway, your hardware is Arrandale, and the symptoms and so on gives enough evidence to point to this being a dupe of bug #745112. The next stage is to try and narrow down what patch from that upstream kernel provides the fix. There are some suspicions - see #745112 for the next steps to take.