ACPI reads wrong temperature

["Peter Mahlknecht" <mali100@gmx.net>]

Hi, 
I installed Debian Lenny (2.6.26-1-686) on my notebook (Samsung P40 with the latest Bios 09HK), but the notebook continued to shutting down with the message "Critical temperature reached (65535 C). Shutting down.". 
To stop this I patched the thermal module, so that it ignores every temperature above 1000 C. 
The wrong temperatuer is also listed in /proc/acpi/thermal_zone/THRM/temperature. Using lm-sensors I get the following output: 
sensors 
acpitz-virtual-0 
Adapter: Virtual device 
temp1:      +65535.0°C  (crit = +105.0°C)                  

max6657-i2c-0-4c 
Adapter: SMBus I801 adapter at 18e0 
M/B Temp:    +39.0°C  (low  = -65.0°C, high = +127.0°C)  
                      (crit = +110.0°C, hyst = +100.0°C)  
CPU Temp:    +44.4°C  (low  = +35.1°C, high = +57.1°C)  
                      (crit = +110.0°C, hyst = +100.0°C) 


The acpitz-virtual-0 device is the temperature that the kernel-acpi-module reads. The temperature listed under CPU Temp is the temperature read directly by lm-sensors, which seems to be right (at least it's in the same range as when running windows). 

Strange is, that during boot the right temperature seems to be read:
[   10.519291] ACPI: Thermal Zone [THRM] (58 C)

I had the same problem also with the 2.6.18-6-686 (Lenny) and with Ubuntu Hardy Heron (think the kernel was 2.6.24). 

Can somenone give me a hint how I can fix the ACPI temperatuer reading? What other logs, system outputs should I post? 

B.R. Peter
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