On Wed, Jan 22, 2014 at 06:59:00PM +0100, Mathias Gerber wrote:
> Hi Guenter
>
> On 22.01.2014 18:27, Guenter Roeck wrote:
> > Interesting. Obviously that doesn't help ;-). What is returned
> > back if you read pwm2 after setting it to 0 ?
> 0 (zero). Maybe some sort of protection?
>
No idea. Might be the fan itself doing it. What happens if you set it to 1 ?
> > 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*').
> Thanks for this hint. I didn't knew about this possibility.
>
Well-kept secret ;-)
> For my needs I set these values:
> pwm2_auto_point1_pwm 7
> pwm2_auto_point1_temp 30000
> pwm2_auto_point2_pwm 178 (default)
> pwm2_auto_point2_temp 55000
> pwm2_auto_point3_pwm 255 (default)
> pwm2_auto_point3_temp 75000 (default)
>
> With these settings the CPU fan (fan2) runs quiet as wished :-)
>
Excellent. Note there is one problem in the driver - any changed pwm
settings will revert to the default after a suspend/resume cycle.
That requires a major change to the driver to fix, so it will take a while.
Until then, you'll have to re-apply the changed configuration after
suspend/resume.
Thanks,
Guenter
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