From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>
Subject: RE: fan control based on temp
Date: Fri, 18 Jun 2004 11:29:43 -0700 (PDT)
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To: Dan <overridex-Kz9Au3A7zptBDgjK7y7TUQ@public.gmane.org>
Cc: "Wang, Zhenyu Z" <zhenyu.z.wang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
List-Id: linux-acpi@vger.kernel.org

On Fri, 18 Jun 2004, Dan wrote:
> On Thu, 2004-06-17 at 01:20, Wang, Zhenyu Z wrote:
> > PowerResource (PFNL, 0x00, 0x0000)
> >             Method (_ON, 0, NotSerialized)
> >             {
> >             }
> >
> >             Method (_OFF, 0, NotSerialized)
> >             {
> >             }
> >         }
> > PowerResource (PFNH, 0x00, 0x0000)
> >             Method (_ON, 0, NotSerialized)
> >             {
> >             }
> >
> >             Method (_OFF, 0, NotSerialized)
> >             {
> >             }
> >         }
> >
> > Method _ON and _OFF are empty. ACPI can't control it.
> > Try this to test:
> > Method (_ON, 0, NotSerialized)
> > {
> >         Or (\_SB.PCI0.PM.GO00, 0x01, \_SB.PCI0.PM.GO00)
> > }
> > Method (_OFF, 0, NotSerialized)
> > {
> >         And(\_SB.PCI0.PM.GO00, 0xFE, \_SB.PCI0.PM.GO00)
> > }
>
> Well, 24 hours later compiling on and off, and the fan seems to be going
> on and off properly - hopefully that did the trick! :)

This indicates that other OS's use a device-specific fan control and don't
bother with ACPI.  There is _no_ way this can work elsewhere with the
stock ASL.

-Nate


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