Subject: Re: ACPI suspend support.
To: Perry E. Metzger <>
From: Jared D. McNeill <>
List: tech-kern
Date: 01/27/2005 18:14:06
On Thu, 2005-01-27 at 17:08 -0500, Perry E. Metzger wrote:
> "Jared D. McNeill" <> writes:
> > Not sure what display adapter you have, but with my d600 I need to use
> > pkgsrc/sysutils/radeontool to toggle my backlight when I enter and leave
> > S1 sleep.
> I seem to recall that the ACPI spec has methods you can invoke to turn
> on and off the display. You might want to look at them...

You can query devices attached (CRT/LCD/DVI/TV), set the devices to use
at POST time, but as far as I could tell from the ACPI 2.0c spec there
was no way to actually cause the display adapter to reset itself.