Frank A. Kingswood wrote: > Martin Michlmayr wrote: >> * Gaudenz Steinlin <[EMAIL PROTECTED]> [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 >> /sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm2 >> /sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm1 >> >> 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.
I've had a play with the script and found: a) In the example /etc/init.d/temper stopping the daemon only does: echo 255 >/sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm2 which doesn't return the fan to full speed! You need to do echo 255 >/sys/devices/platform/IOP3xx-I2C.0/i2c-0/0-002e/pwm2 as well I think, can somebody confirm this? b) In /usr/local/sbin/temper the calculation R=$((1500000/$(cat $SPEED))) for fan RPM seems to be rubbish, as $SPEED rises the reported RPM falls! regards, Colin -- Colin Tuckley | +44(0)1903 236872 | PGP/GnuPG Key Id Debian Developer | +44(0)7799 143369 | 0x1B3045CE Ethernet n.: something used to catch the etherbunny. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
