On Wed, Jan 22, 2014 at 06:01:07PM +0100, Mathias Gerber wrote: > Hi Günther, Hi Michael > > On 22.01.2014 17:25, Guenter Roeck wrote: > > you were faster than me ;-). Michael, let me know if you have any > > problems with the driver. > I'm just through all this during the last few days ;-) > > > Interesting that pwmconfig doesn't recognize this. CPU fans usually > > never stop completely, and afaik the script should recognize the > > speed change. > The output in this step of pwmconfig is: > > Testing pwm control hwmon1/device/pwm2 ... hwmon1/device/fan2_input > > ... speed was 2292 now 2292 no correlation hwmon1/device/fan4_input > > ... speed was 1739 now 1739 no correlation > > > > No correlations were detected. There is either no fan connected to > > the output of hwmon1/device/pwm2, or the connected fan has no > > rpm-signal connected to one of the tested fan sensors. (Note: not > > all motherboards have the pwm outputs connected to the fan > > connectors, check out the hardware database on > > http://www.almico.com/forumindex.php) > > > > Did you see/hear a fan stopping during the above test (n)? ^C > > During this few seconds test, /sys/class/hwmon/hwmon1/device/pwm2 is > set to 0. But if you set this pwm2 to 0, the CPU fan runs with full > speed (same rpm as with pwm2=255) > The other pwm output with a fan connected (pwm4) does not behave like > this and stops the fan with pwm0. > Interesting. Obviously that doesn't help ;-). What is returned back if you read pwm2 after setting it to 0 ? > > Anyway, I would recommend to use the chip's automatic fan control > > if possible. It doesn't rely on a script running in the OS to > > control fan speeds, and usually works pretty well (and can be > > reconfigured if you dislike the BIOS settings). > Normally, yes. But it was not possible to go that low with the fan > speed within the BIOS settings (20% or 25% is the minimum IIRC) You might try setting pwm2_auto_point1_pwm to your preferred minimum (assuming pwm2_enable is set to 5). If that doesn't help, please send me the output of all pwm2 attributes ('grep . /sys/class/hwmon/hwmon1/device/pwm2*'). Side note: If you run 3.13 or later kernels, the attributes will move to /sys/class/hwmon/hwmonX/. Thanks, Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
