Re: Controlling Powerbook fan speed

[Francois Taiani <francois.taiani@comp.lancs.ac.uk>]

Wee-Jin Goh wrote:
> Hi,
>
> What does -2 do?
-2 is the number of °C by which you want to adjust the maximum 
temperatures that are used by the therm_adt driver to decide when to 
start the fan(s).

The default are 50°C for the cpu fan, and 70°C for the gpu one 
(gpu=general power unit), but I think I've heard there is only one fan 
in some PowerBook anyway.

http://kernel.kernelnotes.de/linux-2.6.3/drivers/macintosh/therm_adt7467.c

Cheers

Francois

> On Wed, 2005-03-09 at 20:12 +0000, Francois Taiani wrote:
>
> > I think you can echo a negative value to 
> > /sys/devices/temperatures/limit_adjust
> >
> > (echo -2 > /sys/devices/temperatures/limit_adjust)
> >
> > Cheers
> >
> > Francois
> >
> > Wee-Jin Goh wrote:
> >
> > > Hello,
> > >
> > > Is there anyway to control the fan speed on my Powerbook? I'd like to
> > > set it so that it comes on sooner rather than later (i.e. turn it on at
> > > a lower temperature)?
> > >
> > > Regards,
> > > Wee-Jin