unexpected restart of computer

[Wade Smart]

20090503 0920 GMT-5

In the past 24 hours, 3 times now my computer has rebooted.
Well, thats not entirely accurate...

Just 2 minutes ago I was reading a article on a web site, I moved my 
cursor up and to the left to back out of that page and my screen 
instantly turned black. It takes between 5 and 10 seconds and then the 
login screen pops up. So the computer hardware isn't rebooting, only the 
OS.

Even trying to save your documents every few minutes is difficult on 
something like this.

I looked in the logs but I don't see anything that would say something 
occurred.

Wade
-- 
Registered Linux User: #480675
Linux since June 2005