Change in reported CPU temperatures

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On Sat, 23 Jun 2007 15:05:48 +0100, R Kimber wrote:
> On Sat, 23 Jun 2007 14:46:57 +0200 Jean Delvare wrote:
> > Don't you have another hardware monitoring chip on the board? On an
> > Asus M2N-E, I'd really guess so. Probably an ITE or Winbond Super-I/O
> > with integrated sensors.
> 
> IT8716 reports temp1 as 42C, though I'm not sure what it relates to.

What thermal sensor type does "sensors" report? If a diode, that would
be the CPU temperature. If a thermistor, more likely the temperature in
the CPU socket.

> temp2, which I'm pretty sure is the MB, has remained around 34C
> throughout.
> 
> THRM seems permanently stuck on 40C.  It never ever changes.

Then you could try unloading (and blacklisting) the "thermal" module,
and see if it makes a difference.

> > Also, what temperature does the BIOS report? That would be an
> > interesting comparison point.
> 
> I thought of that, but concluded that there wasn't much point in
> looking, since the machine would be effectively idle and it does cool
> down very quickly after any load stops. shutting down and rebooting
> takes time.

False assumption. The CPU isn't necessarily idle while in the BIOS
setup screen. More often than not, it's in a busy wait loop, which is
equivalent to a moderate load as far as the CPU temperature is
concerned. For example, my CPU is running at 32 degree C in the BIOS,
but only 25 degrees C when idle under Linux. If I add CPU load under
Linux, then the temperature climbs to 32 degrees C - same as in the
BIOS.

> Unless there's a way of reading the BIOS while the machine
> is running??

No.

-- 
Jean Delvare




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