Re: DPMS with ACPI

[Jochen Reinwand <jbr.1-hi6Y0CQ0nG0@public.gmane.org>]

Hi,

I Don't think that DPMS is really related to APM or ACPI. I cannot use ACPI on 
my desktop pc and I have a nVidia card using the XFree module provided by 
nVidia. APM gets disabled by this module:

kernel: apm: set display: Power management disabled

Nevertheless, "xset dpms force standby" is working properly without any 
Problems.
Perhaps DPMS is supported by APM, ACPI and/or the XFree modules...

Jochen

Am Samstag, 7. Dezember 2002 18:24 schrieb Marc Giger:
> Hi Thomas,
>
> On Sat, 7 Dec 2002 16:57:27 +0000
>
> Thomas White <taw27-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org> wrote:
> > On Sat, 7 Dec 2002 17:11:40 +0100
> >
> > Marc Giger <gigerstyle-OI3hZJvNYWs@public.gmane.org> wrote:
> > > I've seen that DPMS needs an APM conform BIOS. The call is made trough
> > > /dev/apm_bios. Is there an equivalent interface for ACPI? How can I
> > > use the DPMS feature with ACPI? This would be a nice feature for my
> > > Laptop.
> >
> > Proabably not the most helpful of comments... but DPMS seems to work
>
> It's ok:-)
>
> > fine for me with ACPI rather than APM running things - I definitely
> > don't have /dev/apm_bios, but "xset dpms force standby" works properly,
> > to put the screen to sleep.
>
> On my Laptop not:-(
>
> It's also a Vaio GR114EK. This Vaio is a difficult case:-))
>
> What i get with "xset dpms force standby" is:
>
> X Error of failed request: BadMatch (invalid parameter attributes)
>   Major opcode of failed request: 140 (DPMS)
>   Minor opcode of failed request: 6 (DPMSForceLevel)
>   Serial number of failed request: 10
>   Current serial number in output stream: 12
>
> I have activated the DPMS in XF86Config with 'Option "DPMS"'
> What I get is:
>
> ....
> Option "DPMS" is not used
> <snip>
> Open APM failed (/dev/apm_bios) (No such device)
> ...
>
> > ( Sony Vaio FX601 with Linux 2.4.19 + ACPI-20020821 and XFree86 4.2.0 )
> >
> > Tom
> >
> > ______________________
> > Thomas White
> > Downing College
> > Cambridge
> >
> >
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