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SubjectRe: bad temperature values from w83781d in 2.6.22
Hi Joerg:

(I tried to follow-up using the gmane.org mail/news gateway... didn't seem
to work.)

* Joerg Sommrey <jo@sommrey.de> [2007-08-05 12:26:04 +0200]:
> Hi,
>
> after upgrading from 2.6.21 to 2.6.22 the CPU temperatures shown by
> w83781d look unreal. They were in a range from 40°C when idle to
> 75°C under full load with 2.6.21. The values shown now are in a very
> small range from 77°C to 82°C. From the (low) noise of the fan I can
> tell that the temperature is <50°C.
> The third temperature shown is completely wrong.
>
> I have a Tyan Tiger MPX board with a w83782d chip. Output from
> "sensors":
>
> w83782d-i2c-0-2d
> Adapter: SMBus AMD768 adapter at 80e0
> +5 V: +4.81 V (min = +4.76 V, max = +5.24 V)
> 3 VSB: +3.30 V (min = +2.85 V, max = +3.15 V) ALARM
> chs3 Fan: 2122 RPM (min = 2657 RPM, div = 4) ALARM
> VRM2 Temp: -208°C (high = -176°C, hyst = -181°C) sensor = transistor
> CPU1 Temp: +78.5°C (high = +80°C, hyst = +75°C) sensor = transistor ALARM
> CPU2 Temp: +77.5°C (high = +80°C, hyst = +75°C) sensor = transistor ALARM
> alarms:
> beep_enable:
> Sound alarm enabled
>
> # cat /sys/bus/i2c/devices/0-002d/temp*_input
> -209000
> 77500
> 77500
>
> Any ideas?

Please run the following commands as root (against both kernel versions) and
reply-to-all with the results:

# modprobe i2c-dev
# i2cdump -y 0 0x2d b 0 0x4e
# i2cdump -y 0 0x48
# i2cdump -y 0 0x49

Also, can you confirm that you're using the sensors.conf from here:
http://www.tyan.com/support_download_utility.aspx?model=s.s2466

Finally, can you confirm that "sensors -s" is running (without error) some
time during system startup, w/ both kernel versions?

Thanks & regards,

--
Mark M. Hoffman
mhoffman@lightlink.com

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