I have an old Dell Pentium 2400 that I just did a clean install of Ubuntu 12.04 Server and I have discovered that it will sometimes freeze up. No keyboard input or ssh. I was looking at some other things online and some were things about graphics so I tried unplugging the monitor I had in but that still didn't work.
It happens randomly, sometimes 10 minutes, sometimes 30 minutes, but it never lasts more than an hour. What sort of things could cause this?
By the way I am running a Memtest as I write this
The syslog doesn't have anything before it crashes. Only information on startups
EDIT: I have tried adding
acpi=off to the boot settings and the problem still persists