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From: Mark Santcroos <marks@ripe.net>
To: Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org>
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Date: Tue, 10 Sep 2002 21:17:05 +0200
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Subject: [acpi-jp 1809] Re: ACPI video driver (for Dell Latitude C640)
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On Wed, Sep 11, 2002 at 12:22:04AM +0900, Mitsuru IWASAKI wrote:
> > Do you think that there is a change that this is in the direction of DPMS,
> > or is that very unliky? I tried to find the spec for DPMS but it seems to
> > be a closed on (at least to non-members).
> 
> It seems that old laptops don't have VGA specific ACPI objects, so
> many people will be happy if we can implement non-ACPI VGA driver w/
> ATI chips hack.
> BTW, have you checked for XFree86 code?  Hopefully we might find
> some hints on DPMS for ATI chips.

Ok, listen to this ;-)

I think DPMS might be very related, because when I suspend from X and
resume again everything is (almost) fine!!

1. I start up the machine
2. startx
3. I enter S1 either by acpiconf / closing the lid / ctrl-esc (sleep key)
4. Screen goes to console and stays on
5. I resume with power key / open lid
6. Screen turns black
7. Few seconds later X is in front of me again!
8. If I now go back to the console (ctrl-f1) the console is still black

I also tried the scenario where I suspend on the console, then resume
again, which turns the screen black. I then startx again and my screen is
back again. This is a major step IMHO.

I already looked at the DPMS code in X and we have to extract that
basically.

Mark

-- 
Mark Santcroos				RIPE Network Coordination Centre
http://www.ripe.net/home/mark/		New Projects Group/TTM
