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Date: Wed, 3 Oct 2001 02:11:55 +0100
From: Josef Karthauser <joe@tao.org.uk>
To: acpi-jp@jp.freebsd.org
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In-Reply-To: <200110030104.f9314At03969@mass.dis.org>; from msmith@freebsd.org on Tue, Oct 02, 2001 at 06:04:10PM -0700
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Subject: [acpi-jp 1322] Re: Switching the screen off.
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On Tue, Oct 02, 2001 at 06:04:10PM -0700, Mike Smith wrote:
> > 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 sw=
itch
> > > > the screen off instead of blanking it?  I beginning to get worried =
about
> > > > the amount of uptime I have on my laptop :).
> > >
> > > There isn't, unfortunately.
> > >
> > > ACPI is glue that lives between parts of the system that are otherwis=
e=3D20
> > > already defined.  Screen and backlight power are typically handled by=
 the=3D
> >
> > > video driver, and thus aren't commonly defined with ACPI.
> >=20
> > Doesn't the video subsystem exist in the ACPI hierarchy somewhere?
>=20
> I think I just said it didn't, right?

Yes, I thought that was what you said.  On the otherhand _something_
switches the screen off in suspend mode.  I thought that is was ACPI.
Maybe it's more anonymous than that.

Joe

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