Bug#419960: `xset dpms force ???' has no effect
On Thu, Apr 19, 2007 at 08:18:04PM -0700, Matt Kraai wrote:
> On Thu, Apr 19, 2007 at 07:21:04PM +0200, Brice Goglin wrote:
> > Matt Kraai wrote:
> > > Package: xserver-xorg-video-vesa
> > > Version: 1:1.3.0-1
> > >
> > > When I run `xset dpms force ???', where ??? is standby, suspend, off, or
> > > on, nothing happens. Here's the lines from /var/log/Xorg.0.log that
> > > contain "DPMS":
> > >
> > >
> > >> (II) Loading extension DPMS
> > >> (II) VESA(0): No DPMS capabilities specified; RGB/Color Display
> > >> (**) VESA(0): DPMS enabled
> > >>
> >
> >
> > Did DPMS ever work on this screen? With another machine/driver?
>
> Not that I know of.
>
> > I am not familiar at all with this code, but it looks like the "no
> > DPMS capabilities specified" comes from EDID/DDC, so it might mean
> > that the screen does not tell the X server that it supports DPMS.
>
> Oh. Is there a way to verify that?
>
I've seen EDID stuff on this bug [1], but the EDID data came from
intel's kernel driver, after looking further, there is the read-edid
package that provide some EDID tools, you can run
`get-edid | parse-edid' as root to read the EDID information.
Well, if you still have the screen...
Anyway, this bug is 3 years old now, and if your screen really don't
have DPMS support, there is no way `xset dpms force ???' will work.
On my computer, with vesa driver I tried the 4 options and all work, but
my /var/log/Xorg.0.log file says:
[...]
(II) VESA(0): EDID Version: 1.3
(II) VESA(0): Analog Display Input, Input Voltage Level: 0.700/0.300 V
(II) VESA(0): Sync: Separate Composite SyncOnGreen
(II) VESA(0): Max H-Image Size [cm]: horiz.: 38 vert.: 30
(II) VESA(0): Gamma: 2.20
(II) VESA(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display
[...]
May I close this bug ?
Best Regards,
1: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=601263#10
--
Julien Viard de Galbert <julien@vdg.blogsite.org>
http://silicone.homelinux.org/ <julien@silicone.homelinux.org>
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