Re: Thermal managment broken

Dominik Brodowski
2002-09-18T17:00:47Z

Hi Pavel,

On Wed, Sep 18, 2002 at 12:25:55PM +0200, Pavel Machek wrote:
> > Additionally, it might be better to specify a "starting" and
> > "stopping" trip point - so that you don't have a fan going
> > on-off-on-off-on-off repeatedly. (IIRC someone complained about this a few
> > months ago on this list). But even without this "feature", I'd like to see
> > the user-specified trip points in the acpi patch.
>
> I believe this is orthogonal. You need to do two thresholds even
> without user help, so it needs to be solved some other way.

IIRC, that's something the DSDT has to provide - the trip points should
change (right in the DSDT) when the fan is turned on or off, respectively.
Many DSDTs don't do this, and this is an annoyance, but except some basic
"sanity checking" (for example, having a minimum fan-on period of x
seconds), such a policy interface should either provide such a two-threshold
policy itself (turn-off==user-value - 5°), or get direct user-input for it.

Dominik

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