Seriously, intel has all sorts of problems with their driver unless you use lts kernels and software that has been tested for some months.
From 3.6 you get these hangs, in 3.8 rc I think I had one variation reported and it got fixed quite quickly I think, perhaps it fixed some others too. I still sometimes can trigger it, maybe once every 20 minutes when playing nitronic rush. Now however it can recover after a few seconds without losing 3d acceleration so it's not that bad anymore.
Currently in 3.9 rc and also in 3.8 it sometimes gets stuck when trying to from/to a tty to/from X.
[11538.531257] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting
[11538.531262] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing D46E (len 62, WS 0, PS 0) @ 0xD48A