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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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