Bug#667517: As far as i'm concerned, switching from the 3.2 kernel version to the 3.5 kernel version solved my problem.

[thibaut bethune <thibaut.bethune@gmail.com>]

Hi,

I had the same problem with a clean installation of Debian
GNU/Linux/GNOME Sid 64 bits and an Ivy Bridge CPU (Core i3-3225 with
HD4000)

Switching from the 3.2 kernel version to the 3.5 kernel version solved
my problem.

You may know that Ivy Bridge had some bugs that have been fixed after
the release of the 3.2.0 version of the kernel (see
http://intellinuxgraphics.org/2012.02.html with corresponding patches
("Stability fixes for hard hangs on Ivy Bridge platform: those patches
fix occasional hard-hangs on Ivy Bridge platforms when running GL
workloads:")

Hope it can help

Thanks for your work

Thibaut