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Re: fan control on thecus n2100

Martin Michlmayr wrote:
* Gaudenz Steinlin <gaudenz@debian.org> [2008-01-09 11:27]:
How can I set the fan speed manually now and how do I enable automatic
fan control (if possible)?

I don't know which tools to use to control it automatically, but here
are instructions for manual use:

   By default, the fan should run at full speed. If you need to regulate the speed, you need to
   locate the pwm files in /sys:
find /sys/ | grep pwm

   If you want to stop the fan, you have to write the value zero to these files:
echo 0 > /sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm2
echo 0 > /sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm1

   You can activate full speed using the following commands:
echo 255 > /sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm1
echo 255 > /sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm2

See http://www.debonaras.org/wiki/Info/N2100FanControl for a shell script that regulates the fan by reading system and disk temperatures. Fan control has only a very small control range, and the script needs to be tuned for that, but when that is done it works just fine.


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