Thermal zones fan control

Hello.

(2.5.70-bk19, ACER TM630)
What does control fans on thermal zones ? (ACPI || BIOS) ??

What is the value of temperature for "fan ON/OFF"? (thermal/.../cooling_mode)

The fans of thermal zones dont start when temperature is higher or less. They are at the same state all time. ( i have to restart computer to change cooling_mode) I am afraid about my laptop, because of high temperature.

here is my acpi info:

#cat /proc/acpi/thermal/THRC/polling_frequenci:
<polling disabled>

#cat /proc/acpi/thermal/THRC/state:
state: ok

#cat /proc/acpi/thermal/THRC/cooling_mode:
cooling mode: active

#cat /proc/acpi/thermal/THRC/trip_points:

	critical (S5):           100 C
	passive:                 86 C: tc1=2 tc2=5 tsp=300 devices=0xcfeee760 

#cat /proc/acpi/thermal/THRC/temperature:
temperature: 38 C

Thx

mizu

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