please disregard my earlier post, I don't think it's Xorg, I found this
bug:
http://www.ubuntuforums.org/showthread.php?t=196783
Which indicates it's a fan/heat problem. Since monitoring the
temperature of my system, that does seem to be the case. I've followed
the advice in that thread, it seems
Similar problem here using ati M6 card on a thinkpad x30.
System locks up totally after 10-40 minutes of use, no visible errors,
only started when I upgraded to dapper-release (earlier releases of
dapper were fine).
A solution to this one would be great!
I'll try downgrading to breezy again for
