many crashes of X server, what should I investigate?

[Tim]

Allegedly, on or about 11 January 2013, Frédéric Bron sent:
> Yesterday, the X server crashed after closing a game (Extreme Tux
> racer in full screen mode) -> black screen + CPU at 100%. -> had to
> hard power off.
> Now the fan is blocked at maximum speed and I do not know how to go
> back to normal state.

The first thing that springs to mind is:  Had the first overheating
cooked the CPU heatsink goo, and now the chip can't cool down properly.

-- 
[tim at localhost ~]$ uname -rsvp
Linux 3.6.10-2.fc17.x86_64 #1 SMP Tue Dec 11 18:07:34 UTC 2012 x86_64

All mail to my mailbox is automatically deleted, there is no point
trying to privately email me, I will only read messages posted to the
public lists.