Diagnosing reboot under load

[Micah]

Skylar Thompson wrote:
> Micah wrote:
> 
>>
>> My desktop system just started doing this last night.  I was upgrading 
>> Gnome using the handy shell script they provide.  It looks like 
>> sometime around 11:30pm the computer reset.  This morning I'm trying 
>> to reinstall all the software that got lost in last night's reset and 
>> I get another reset in the middle of compiling.  The last message in 
>> /var/log/messages before reboot is:
>> Nov  6 10:41:08 trisha ntpd[489]: kernel time sync enabled 6001
>> Nov  6 10:58:14 trisha ntpd[489]: kernel time sync enabled 2001
>> Nov  6 13:02:57 trisha syslogd: kernel boot file is /boot/kernel/kernel
>>
>> I just ran memtest86+ and there's no memory errors.  I'm guessing it's 
>> a hardware issue, but how do I diagnose it?
> 
> 
> 
> Could it be a bad power supply? Try swapping in another one and see what 
> happens.
> 

I was thinking that too, unfortunately I don't have a spare and was
hoping to diagnose before buying parts.  Voltages look fine when I check 
the accessory lines (+5 and +12) with a multimeter under load.

Thanks,
Micah