From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jean Delvare <khali@linux-fr.org>
Date: Thu, 12 Jun 2008 13:30:46 +0000
Subject: Re: [lm-sensors] Wrong CPU Temp
Message-Id: <20080612153046.783057cd@hyperion.delvare>
List-Id: <lm-sensors.vger.kernel.org>
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To: lm-sensors@vger.kernel.org

Hi Paul,

On Thu, 12 Jun 2008 14:13:50 +0100, Paul Smith wrote:
> In the output below, the value
>=20
> CPU Temp:     -2.0=B0C  (low  =3D +127.0=B0C, high =3D +127.0=B0C)  senso=
r =3D transistor
>=20
> seems unlikely:
>=20
> $ sensors
> it8712-isa-0290
> Adapter: ISA adapter
> VCore 1:     +1.28 V  (min =3D  +0.00 V, max =3D  +4.08 V)
> VCore 2:     +1.82 V  (min =3D  +0.00 V, max =3D  +4.08 V)
> +3.3V:       +3.38 V  (min =3D  +0.00 V, max =3D  +4.08 V)
> +5V:         +6.85 V  (min =3D  +0.00 V, max =3D  +6.85 V)   ALARM
> +12V:       +11.84 V  (min =3D  +0.00 V, max =3D +16.32 V)
> -12V:       -13.86 V  (min =3D -27.36 V, max =3D  +3.93 V)
> -5V:         -7.34 V  (min =3D -13.64 V, max =3D  +4.03 V)
> Stdby:       +6.85 V  (min =3D  +0.00 V, max =3D  +6.85 V)   ALARM
> VBat:        +4.08 V
> fan1:       1704 RPM  (min =3D    0 RPM, div =3D 8)
> fan2:          0 RPM  (min =3D    0 RPM, div =3D 8)
> fan3:          0 RPM  (min =3D    0 RPM, div =3D 8)
> M/B Temp:    -55.0=B0C  (low  =3D +127.0=B0C, high =3D +127.0=B0C)  senso=
r =3D transistor
> CPU Temp:     -2.0=B0C  (low  =3D +127.0=B0C, high =3D +127.0=B0C)  senso=
r =3D transistor
> Temp3:       +47.0=B0C  (low  =3D +127.0=B0C, high =3D +90.0=B0C)  sensor=
 =3D thermal diode
> cpu0_vid:   +1.350 V
>=20
> $
>=20
> My motherboard is a GigaBite GA-81945PL-G, the processor is an Intel
> Dual Core, and the operating system is Fedora 9.
>=20
> Any ideas?

Typical of Gigabyte boards. They put two Ethernet chips, 2 USB
controllers, Firewire, two Serial ATA controllers, etc. on the board,
but omit the thermistor for motherboard temperature to save a few
cents. Go figure... My own board (Gigabyte K8V Ultra-939) says:

temp1:       +25.0=B0C  (low  =3D +127.0=B0C, high =3D +127.0=B0C)  sensor =
=3D disabled
temp2:       -55.0=B0C  (low  =3D +127.0=B0C, high =3D +127.0=B0C)  sensor =
=3D disabled
temp3:       +47.0=B0C  (low  =3D +10.0=B0C, high =3D +51.0=B0C)  sensor =
=3D thermal diode

And temp1 never changes. So, same as yours: temp3 is the CPU
temperature, and temp1 and temp2 can be ignored (and even disabled).
The relevant part of my configuration file is:

### Temperatures

   # Gigabyte confirmed that there is no system temperature sensor on this
   # motherboard. This is really disappointing, as the board is otherwise
   # full featured.

   ignore temp1
   ignore temp2
   label  temp3  "CPU Temp"

   set temp1_type 0
   set temp2_type 0

   # The CPU temperature was seen from 34 to 48 degrees C so far.
   set temp3_min  10
   set temp3_max  51

Hope that helps,
--=20
Jean Delvare

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