Re: fan control on thecus n2100
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=$((150/$(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]
Re: fan control on thecus n2100
Colin Tuckley wrote: [snip] 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? Sorry - I can't see the difference between those two. Incidentally, I too have looked at that script. There are references to needing to work out a couple of values to suit your machine but no indication of what the values represent or how you would work them out. Can anyone provide more information? TIA, John -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
John Winters wrote: Sorry - I can't see the difference between those two. Oops! Typo. You need to set both pwm1 and pwm2 to 255 to make the fan run at full speed I think - anyone confirm? The existing script only does one of them. Also, I've just noticed that it sets the fan to full speed *before* it kills the daemon, which is unsafe since the daemon might run again before it gets killed and leave you with a slow or stopped fan! Incidentally, I too have looked at that script. There are references to needing to work out a couple of values to suit your machine but no indication of what the values represent or how you would work them out. Can anyone provide more information? The values are the temp difference for fan control FAN_RNG - which I've left as 10 Degrees C and FAN_MIN which is the lowest fan speed control value to output when not either stopping the fan (0) or running it at full speed (255). I've currently got mine set to 60 rather than the provided 70. I suspect it depends on how many hard drives you have fitted (one in my case) and how good the airflow is in the box, with some of the ventilation mods from the Debonaires page you can probably use a lower value. The idea being that in the ideal case the fan would come on at it's slowest speed as the box initially warms up and stay there all the time rather than coming on too fast and then being cycled off and on again. 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]
Re: fan control on thecus n2100
Colin Tuckley wrote: John Winters wrote: Incidentally, I too have looked at that script. There are references to needing to work out a couple of values to suit your machine but no indication of what the values represent or how you would work them out. Can anyone provide more information? The values are the temp difference for fan control FAN_RNG - which I've left as 10 Degrees C and FAN_MIN which is the lowest fan speed control value to output when not either stopping the fan (0) or running it at full speed (255). I've currently got mine set to 60 rather than the provided 70. I suspect it depends on how many hard drives you have fitted (one in my case) and how good the airflow is in the box, with some of the ventilation mods from the Debonaires page you can probably use a lower value. The idea being that in the ideal case the fan would come on at it's slowest speed as the box initially warms up and stay there all the time rather than coming on too fast and then being cycled off and on again. Actually, it depends on the precise nature of your fan and it's control system. The "minimum PWM setting for which the fan reliably runs" varies considerably from one unit to the next, as does "the maximum PWM number beyond which the fan speed ceases to increase". For me, anything less than 62 and the fan is too easily stopped and does not restart, anything greater than 90 is equivalent to 255. So, although the PWM has a setting range of 256, my fan is only controlled over a range of about 30! regards, Colin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
Steve Gane wrote: Actually, it depends on the precise nature of your fan and it's control system. The minimum PWM setting for which the fan reliably runs varies considerably from one unit to the next, as does the maximum PWM number beyond which the fan speed ceases to increase. For me, anything less than 62 and the fan is too easily stopped and does not restart, anything greater than 90 is equivalent to 255. So, although the PWM has a setting range of 256, my fan is only controlled over a range of about 30! Yes, I've discovered that too. My fan won't start with a value less than 60 but will keep going once running down to about 56. Also the N2100 seems to have problems reading the actual fan tacho values, I get a sudden drop in reported speed once the pwm value gets to about 80 despite being able to hear the fan actually running faster! Also note that Riku's driver reports actual fan speed rather than tacho value and so the calc at the end of the script isn't required. There is also a bug in your /etc/init.d/temper script. You set the pwm value to 255 for full speed before you stop the daemon. There is a chance that the daemon might change the value again before the init.d script gets to killing it, resulting in a possibly stopped or slow running fan. I've just updated the Wiki. regards, Colin -- Colin Tuckley | +44(0)1903 236872 | PGP/GnuPG Key Id Debian Developer | +44(0)7799 143369 | 0x1B3045CE Banging your head against the wall uses 120 calories an hour. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
Steve Gane wrote: Hey, it's not *my* script. But I think it does the job quite well. Oh, your name is in the comment at the top of the page, so I assumed it was yours. Colin -- Colin Tuckley | +44(0)1903 236872 | PGP/GnuPG Key Id Debian Developer | +44(0)7799 143369 | 0x1B3045CE APATHY ERROR: Don't bother striking any key. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
Colin Tuckley wrote: There is also a bug in your /etc/init.d/temper script. You set the pwm value to 255 for full speed before you stop the daemon. There is a chance that the daemon might change the value again before the init.d script gets to killing it, resulting in a possibly stopped or slow running fan. I've just updated the Wiki. Hey, it's not *my* script. But I think it does the job quite well. regards, Colin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
fan control on thecus n2100
Hi With kernel 2.6.23 the F75375 driver for the fan control was updated. AFAICS it should now support automatic fan control, but I did not suceeed in enableing it. Is there any documentation for the files in /sys/devices/platform/IOP3xx-I2C.0/i2c-adapter\:i2c-0/0-002e/ How can I set the fan speed manually now and how do I enable automatic fan control (if possible)? Gaudenz -- Ever tried. Ever failed. No matter. Try again. Fail again. Fail better. ~ Samuel Beckett ~ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
* 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 -- Martin Michlmayr http://www.cyrius.com/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
On Wed, Jan 09, 2008 at 11:27:22AM +0100, Gaudenz Steinlin wrote: suceeed in enableing it. Is there any documentation for the files in /sys/devices/platform/IOP3xx-I2C.0/i2c-adapter\:i2c-0/0-002e/ see: Documentation/hwmon/sysfs-interface How can I set the fan speed manually now and how do I enable automatic fan control (if possible)? Martin already explained the manual control. Automatic control using just the fintek chip would require reliable reading of fan speed, which does not appear to be the case on N2100. However, such tool can be written for userland (I think someone did already?). -- rm -rf only sounds scary if you don't have backups -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: fan control on thecus n2100
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. Frank -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
