While waiting for another box I decided to pull the RAM and test each
stick (256 MB each). The problem occurred with either stick. I'm able to
log in, work for a few minutes, then the box just freezes. I can hear
the disk drive make a little activity noise first, then everything's
just gone. Btw, it'll die in X or at the console, it's not an X problem
(I think). And since the problem occurs whether I'm on /dev/hda or
/dev/hdb I doubt if both disk drives are bad.
Anyway, Ivy's bringing over the other machine in another day or so,
I'll switch drives into that machine and see what happens next.