acpi/sensors temperature on nx6325

[Mircea Bardac <dev.list@mircea.bardac.net>]

Hi all,

I'm currently running kernel 2.6.21.3 on a HP nx6325.

I like having in the taskbar information about cpu/mem/temperature/etc. I 
found a strange behaviour monitoring the ACPI provided temperature. It 
currently shows for example 48C constantly, for lots of minutes. 

Doing a: dd if=/dev/urandom of=/dev/null increases the CPU usage and 
temperature should increase too. The ACPI temperature stays the same though.

I have also loaded the lm_sensors modules which, after some monitoring, appear 
to be working right, meaning "it shows an increasing temperature if the CPU 
usage increases".

# cat /proc/acpi/thermal_zone/TZ1/temperature && sensors
temperature:             48 C
k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:
             +54°C
Core1 Temp:
             +53°C


The ACPI temperature increases only when the trip-point is reached. I hear the 
fans starting. When the fans stop, the temperature drops "hard" to the 
previous value.

I've changed the polling frequency to 1:
# cat /proc/acpi/thermal_zone/TZ1/polling_frequency
polling frequency:       1 seconds

I got the same effect: I can't see the temperature change dynamically, degree 
by degree. Also, in a test, the sensor went up to 60-65C and the trip-point 
did't activate. This was with polling set to 1.

If you need any more information, let me know.


Regards,
Mircea
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