From owner-freebsd-acpi@FreeBSD.ORG  Tue May  4 22:25:06 2004
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Date: Tue, 4 May 2004 22:25:08 -0700 (PDT)
From: Nate Lawson <nate@root.org>
To: christian uhrhan <christian.uhrhan@gmx.de>
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cc: freebsd-acpi@freebsd.org
Subject: Re: ACPI is not working
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On Wed, 5 May 2004, christian uhrhan wrote:
> Hi,
>
> >
> > I looked at your dmesg and ACPI is working fine.  You can get increased
> > CPU idle power savings by doing:
> >
> > sysctl hw.acpi.cpu.cx_lowest=1
>
> thx, i'll try it out

You can put that in /etc/sysctl.conf if it works ok.  Make sure it works
before doing that though.  It should lower the temps with no real
performance hit (unlike throttling).

> > The acpi_cpu driver is not detecting that your system supports throttling.
> > Please post a link to your full ASL:
> >    acpidump -t -d > christian.asl
>
> you can take a look at it at http://ahrlug.dyndns.org/acpi_problem/christian.asl

Your system does not support throttling.  It has a 0 for duty_width.
However, it does support ACPI performance states so once the driver is
finished for those, you will be able to step back your clock to save
power/heat.  That's a different and better mechanism than throttling
anyway.

-Nate