From owner-freebsd-acpi@FreeBSD.ORG  Tue May  4 16:10:56 2004
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Date: Tue, 4 May 2004 16:10:57 -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 Tue, 4 May 2004, Christian Uhrhan wrote:
> system details:
> Notebook:       targa visionary xp
> CPU:            mobile amd athlon 2200+
> uname -a:       FreeBSD secretcore.ahrlug.dyndn.org 5.2-CURRENT FreeBSD
> 5.2-CURRENT #0:
>                 Sun May  2 12:45:35 CEST 2004
>
> chris@secretcore.ahrlug.dyndn.org:/usr/src/sys/i386/compile/SECRETCORE  i386
>
> dmesg output:   http://ahrlug.dyndns.org/acpi_problem/dmesg.log
> sysctl hw.acpi: http://ahrlug.dyndns.org/acpi_problem/hw.acpi
>
> first i had installed freebsd 5.1 but got some errors about a broken
> acpi-table. After installing
> freebsd 5.2 the errors there was no more errors at boot-time but acpi was
> still not working.

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

> a message which does not appear at my boot output, like this:
>
> (1)
> acpi_cpu: throttling enabled, 8 steps (100% to 12.5%)
>
> furthermore or better said therefore my system is mission sysctl-variables
> like
>
> (2)
> hw.acpi.cpu.performance oder
> hw.acpi.cpu.economy

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

-Nate