reset=1 required for PWM control on Asus P4P800 Deluxe

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It works with 2.6.14rc5

-----Message d'origine-----
De : Jean Delvare [mailto:khali at linux-fr.org]
Envoy? : jeudi 10 novembre 2005 15:50
? : lists at sk2.org; Eric Pascal
Cc : LM Sensors
Objet : Re:  reset=1 required for PWM control on Asus P4P800
Deluxe



Hi Stephen, Eric,

> > I have been submitting a patch to enable Fan speed control on my
> > P4P800, and if you disable Q-Fan in the BIOS it work perfectly, you
> > just set the temperature you want, the tolerance and the step and it
> > works perfectly, don't need to rely on any tool like Speedfan on
> > Windows to set the speed of my fan. The patch is being tested and
> > modified to comply with lm-sensors standard. But if you are
> > interested I can send you the patch that works great.

I'm a bit worried by the "if you disable Q-Fan in the BIOS" condition.
It should work even with it enabled.

Anyway, Eric, I am still waiting for you to post the latest version of
your patch so that we can improve it.

> I realise now that my first mail was somewhat hasty, and in fact my setup
> is (was) so unusual that it probably doesn't justify keeping reset=1. I
> imagine most people who set Q-Fan up in their BIOS would want its fan
> control to remain after booting, and those people who want to use
> software-based fan control would simply disable Q-Fan altogether!

Except that some boards do not let you disable the automatic fan speed
control.

> Furthermore if the controller can be switched from one mode to another
> at run-time, resetting it would become unnecessary (or rather, subsumed
> by the mode switching), wouldn't it?

My point exactly. I still want to remove the reset parameter in the long
run, but I think we need to merge Eric's patch (after rework) before we
do.

Thanks,
--
Jean Delvare


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