Help: Machine says it's running hot

[Arthur Pemberton]

On 10/25/06, Arthur Pemberton <pemboa at gmail.com> wrote:
> I got messages saying that the machine was running hot on several
> occasions. The first time, I shut down the machine, check thed the
> temp in the BIOS (68 degrees C) and then proceeded to clean out the
> CPU fan, and dusted teh rest of the machine.
>
> The second time I just restarted to the BIOS to check the temp again
> myself: 74 degrees C Both these temps are supposed to be within the
> okay range of my Intel Celeron running at 2.8 GHz.
>
> Please advise on what could be causing this, the message (pasted
> below) are very unsettling.
>
> ======================================================
> Oct 25 01:38:00 Watson kernel: CPU0: Temperature above threshold
> Oct 25 01:38:00 Watson kernel: CPU0: Running in modulated clock mode
> Oct 25 01:38:03 Watson ntpd[2569]: kernel time sync enabled 0001
> Oct 25 01:38:05 Watson kernel: CPU0: Temperature above threshold
> Oct 25 01:38:05 Watson kernel: CPU0: Running in modulated clock mode
> Oct 25 01:38:10 Watson kernel: CPU0: Temperature above threshold
> Oct 25 01:38:10 Watson kernel: CPU0: Running in modulated clock mode
> Oct 25 01:38:15 Watson kernel: CPU0: Temperature above threshold
> Oct 25 01:38:15 Watson kernel: CPU0: Running in modulated clock mode
> Oct 25 01:38:20 Watson kernel: CPU0: Temperature/speed normal
> Oct 25 01:38:25 Watson kernel: CPU0: Temperature above threshold
> ======================================================
>
> --

UPDATE

This all occurs when the machine is under load. It happened last when
I was doing a sha1sum of the FC6 DVD imames. The case has been wide
open for weeks now. The room isn't warm either.

But lm_sensors did show the CPU at 80 degrees C whehn the messages showed up.

Please advise.
-- 
Fedora Core 5 and proud