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To: Randy Bush <randy@psg.com>
From: takawata@jp.freebsd.org
In-reply-to: Your message of "Sat, 21 Feb 2004 09:41:30 PST."
             <20040221174132.53AA243D1D@mx1.FreeBSD.org>
Date: Sun, 22 Feb 2004 04:01:10 +0900
Sender: takawata@init-main.com
cc: current@FreeBSD.org
Subject: Re: sysctl hw.acpi.video.lcd0.active
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In message <20040221174132.53AA243D1D@mx1.FreeBSD.org>, Randy Bush さんいわく:
>the last hack to rc.suspend to make power go really low on
>my thinkpad t40p was
>
>    # HACK HACK HACK
>    /usr/X11R6/bin/xset -display :0 dpms force off
>    sleep 3
>    sysctl hw.acpi.video.lcd0.active=0
>    sleep 1
>    sysctl hw.acpi.cpu.throttle_state=1
>    # KCAH KCAH KCAH
>
>recently, i started getting
>
>    sysctl: unknown oid 'hw.acpi.video.lcd0.active'
>
>and
>
>    # sysctl -a | egrep '(video|lcd)'
>    #
>
>any clues?

Stock ACPI module does not have ACPI video extension feature.
I know some patches are posted to add the feature.
If you had used one of them, make sure you patched your source.