Thinkpad T61 - Fan running a lot of time
From: Renato S. Yamane
Date: Tue Mar 24 2009 - 16:51:19 EST
Hi,
Anyone have seen fan turned-on in 90% of the time?
I see that fan power-on when processor is up than 45°C and power-off
when is under 45°C.
Temperature difference between 2 cores is 5°C in idle (Core1=45°C and
Core2=40°C)
Local temperature is ~25°C, kpowersave is in "dynamic mode", my 2 cores
(Intel T7500) is running 94% of the time in idle (checked with "top"),
with clock in 800MHz.
The fan speed is ~2600RPM (always under 3000RPM), and I think that is
not enough to cooling the processor, because is necessary 3min to
decrease 1°C in Core1 and only 40sec to increase 1°C.
I think that is necessary a higher fan speed.
I see this in Debian Lenny (2.6.26-1) and 2.6.28.8 kernel... Maybe in
other versions too.
Regards,
Renato
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