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#1 2011-09-16 17:46:04

Camus
Member
Registered: 2011-07-03
Posts: 71

Can't reach max (also with fancontrol) and min fan speed manually

I'm using fancontrol to control my fan's speed. One thing I noticed is that maximum fan speed is never reached even when temperatures exceed max limit.

If I set max temperature in /etc/fancontrol to 55 and restart fancontrol, 55+°C will cause fan to speed only at ~5800 RPM. If I set min temperature to 60, fans will completely stop. 'pwm_enable' is set to 1 when fancontrol is running.

Now if I stop fancontrol, fan will speed up to ~6460 RPM while 'pwm' is at 255 and 'pwm_enable' changed to 0. I can't change 'pwm' value at this point. If 'pwm' gets set to 0, fan will completely stop.

At this point fancontrol is still not running. If I set 'pwm_enable' to 1 and leave 'pwm' at 255, fan will slow down to ~5800 RPM. If I set 'pwm' to 0, fan will not slow down completely, but will instead slow down to ~2080 RPM.

What's interesting is that although fancontrol can't reach max fan speed, it can stop fan completely, while I can do neither manually.

Any idea how to enable at least max fan speed for fancontrol?

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