linux-kernel - bad temperature values from w83781d in 2.6.22

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Message-ID: <20070805102604.GA9123@sommrey.de>
Date:	Sun, 5 Aug 2007 12:26:04 +0200
From:	Joerg Sommrey <jo@...mrey.de>
To:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: bad temperature values from w83781d in 2.6.22

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?

-jo

-- 
-rw-r--r-- 1 jo users 62 2007-08-04 14:02 /home/jo/.signature
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