Change in reported CPU temperatures

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On Mon, 25 Jun 2007 20:42:16 +0200
Jean Delvare wrote:

> > 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.

It doesn't say.  I've added the output of the sensors command at the
end.  They are not explicitly set in sensors.conf and I don't know what
they should be.

> > 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.

I did that, but there's no change.

> > > 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.

I hadn't realised that, thanks.  I looked and got:-

CPU 39C  and  MB 33C, which is much the same as when Boinc is running

Sensors gives:-

k8temp-i2c--5-c3
Adapter: PCI adapter
Core0 Temp: 37.00 (temp1)
Core1 Temp: 38.00 (temp3)

it8716-isa-0290
Adapter: ISA adapter
VCore: 0.98 (in0)
  in0_min: 0.00 (in0_min)
  in0_max: 4.08 (in0_max)
VDDR: 3.25 (in1)
  in1_min: 0.00 (in1_min)
  in1_max: 4.08 (in1_max)
+3.3V: 0.00 (in2)
  in2_min: 0.00 (in2_min)
  in2_max: 4.08 (in2_max)
+5V: 4.84 (in3)
  in3_min: 0.00 (in3_min)
  in3_max: 6.85 (in3_max)
+12V: 11.58 (in4)
  in4_min: 0.00 (in4_min)
  in4_max: 16.32 (in4_max)
in5: 0.00 (in5)
  in5_min: 0.00 (in5_min)
  in5_max: 4.08 (in5_max)
in6: 0.00 (in6)
  in6_min: 0.00 (in6_min)
  in6_max: 4.08 (in6_max)
5VSB: 4.87 (in7)
  in7_min: 0.00 (in7_min)
  in7_max: 6.85 (in7_max)
VBat: 2.98 (in8)
fan1: 1683.00 (fan1)
  fan1_min: 0.00 (fan1_min)
ERROR: Can't get feature `fan1_div' data!
fan2: 0.00 (fan2)
  fan2_min: 0.00 (fan2_min)
ERROR: Can't get feature `fan2_div' data!
fan3: 890.00 (fan3)
  fan3_min: 0.00 (fan3_min)
ERROR: Can't get feature `fan3_div' data!
temp1: 35.00 (temp1)
  temp1_low: -1.00 (temp1_low)
  temp1_over: 127.00 (temp1_over)
temp2: 33.00 (temp2)
  temp2_low: -1.00 (temp2_low)
  temp2_over: 127.00 (temp2_over)
temp3: 3.00 (temp3)
  temp3_low: -1.00 (temp3_low)
  temp3_over: 127.00 (temp3_over)
vid: 1.10 (vid)
alarms: 25600.00 (alarms)
sensor1: 3.00 (sensor1)
sensor2: 2.00 (sensor2)
sensor3: 2.00 (sensor3)

I don't know why I get the fan div error, there is
set fan1_div 4
etc., in sensors.conf.  Maybe I have the syntax wrong.

I'm not sure the voltages are reported correctly, but I don't know
anything about MB voltages
BIOS says Vcore is 1.34v; 3.3v is 3.43v; 5v is 5.18v and 12v is 12.43v

- Richard
-- 
Richard Kimber
http://www.psr.keele.ac.uk/




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