Re: Sreen blanking [was Re: acpi-20021101, Dell inspiron 8100 report.]

Ducrot Bruno
2002-11-16T16:46:03Z

On Sat, Nov 16, 2002 at 04:23:54PM +0100, Pavel Machek wrote:
> Hi!
>
> > > > >>I am using acpi-20021101 on a dell inspiron 8100. When I try to go
> > > > >>into S1 sleep computer does not sleep. Te power button blinks on and
> > > > >>off, which is unusal, and the screen never blanks, even when I close
> > > > >>the lid. I do have acpid setup to send echo 1 > /proc/acpi/sleep
> > > > >>
> > > > >>Is there anything I can send to the list to help with diagnostics?
> > > > >>
> > > > >>
> > > > >
> > > > >Screen staying on is normal. Does it wake up
> > > > >when you press power?
> > > > >
> > > > >
> > > > >
> > > > When I press power to restore the console is always locked up tight. I
> > > > cannot use keyboard or mouse, but if I am in X my X console usually
> > > > works after restore, but not all the time.
> > >
> > > Hmm, strange.
> > >
> > > > How can I make the screen blank when I go into sleep?
> > >
> > > No idea, there is not much about screenblanking in acpi specs.
> > >
> >
> > If you are lucky, try first DPMS. If it doesn't work, you have to
>
> DPMS does not work at least on toshiba 4030cdt. (tried long and hard).

That why I say 'If you are lucky'... I was not so lucky too, unless
I got the omke.pl for this purpose..

>
> > know what kind of video chipset you have, then you should be able
> > to control the Flat Panel controller (should be attached to the I2C
> > interface of the video chipset), or control it via some register (again,
> > of the video chip).
>
> This looks like awfull lot of work, special for each notebook
> :-(. Intel should define control method for blanking screen.

There is already DPMS for this purpose. The only issue is OEM.
AFAIK, this should also be per video chipset, not per notebook (in theory,
of course...)

--
Ducrot Bruno
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