Comment 42 for bug 908335

@ Brendan Brigham - I'm not sure that this is the same issue because reading through the logs there it seems that the problem relates to heavy graphics use, and perhaps the Intel Ivy Bridge chipset.

Plus some users there suggest that they are able to open a shell and interact with the machine.

When my system hangs. It requires a power-off - no response.

I guess they might be related though so thanks for cross-posting it.