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Date: Wed, 3 Oct 2001 01:44:26 +0100
From: Josef Karthauser <joe@tao.org.uk>
To: acpi-jp@jp.freebsd.org
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References: <20011002103926.T6422@tao.org.uk> <200110022348.f92NmIt03010@mass.dis.org>
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In-Reply-To: <200110022348.f92NmIt03010@mass.dis.org>; from msmith@freebsd.org on Tue, Oct 02, 2001 at 04:48:18PM -0700
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Subject: [acpi-jp 1320] Re: Switching the screen off.
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On Tue, Oct 02, 2001 at 04:48:18PM -0700, Mike Smith wrote:
> > Is there a mechanism in place within acpi that would allow me to switch
> > the screen off instead of blanking it?  I beginning to get worried about
> > the amount of uptime I have on my laptop :).
>=20
> There isn't, unfortunately.
>=20
> ACPI is glue that lives between parts of the system that are otherwise=20
> already defined.  Screen and backlight power are typically handled by the=
=20
> video driver, and thus aren't commonly defined with ACPI.

Doesn't the video subsystem exist in the ACPI hierarchy somewhere?
Isn't it possible to identify which device the screen is and power it
down to a lower power level using the ACPI sequenced defined?

Joe

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