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Re: case fan control

On Sun, 10 Oct 2010 21:53:18 +0200, Klistvud wrote:

> Dne, 10. 10. 2010 18:24:01 je Camaleón napisal(a):
>> I maybe wrong but AFAIK, 3-pin fans cannot be controller by ACPI (only
>> PWM, that is, 4-pin fans can). Anyway, you can use an external fan
>> regulator which allows you to put the fan rpm at fixed speed or you can
>> buy a silent (low speed) fan.
> I think ACPI can cotrol 3-pin fans too -- *if* such support is built
> into the motherboard. You probably just have to install some particular
> package, such as lm-sensors or fancontrol or a dedicated kernel module?
> I regret not being able to be more specific, but it's been some time
> since I've tackled the fan controllers on my boxes. I was under the
> impression actually that ACPI fan control worked out-of-the-box on
> Debian, but memory may be failing me (and I don't mean RAM).

lm_sensors provides that ability _but_ I think you still need 4-pin fans 
or you can get undesired results:


What I use is a "fixed" regulator (external) for controlling the micro 
fan speed. Dunno if "fancontrol" can also do it that way :-?

I avoid using PWM fans, for computer case or heatsink. I prefer to stick 
with 3-pin and manually control them to get a silent PC. In fact, most of 
the fans in the case are unregulated but of those called "quiet" (min.18/
max.25dB) so I don't have to bother about them.



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