In bug 68235, the display was freezing with kernel 3.11.0 (also tested with
3.12-rc1) either at logon or shortly after. It was possible to access the
machine through ssh. Since applied patches, the max clocks are detected,
allowing the computer to run normally.
However, at some point, it always ends up frozen (it can be just sitting there,
nothing being done on the computer). The frozen state is deeper than before
since it's impossible to access the machine through ssh. I've tested the
computer by playing Dota2 and, until now, it doesn't seem related to the card
working harder or not.
Logs don't show anything for the moment, I'll have to push the debug state a
bit further.
Any suggestion where to start to give us a clue on what is triggering the
freeze?