Re: Compaq Presario 2100 laptop, xorg no output on external VGA (projector), running Etch.

[Søren Christensen <severino@ulvedalen.dk>]

On Thu, Apr 27, 2006 at 11:16:52AM -0700, Andrew Sackville-West wrote:
> On Thu, Apr 27, 2006 at 12:27:55PM +0200, Søren Christensen wrote:
> > On Tue, Apr 25, 2006 at 07:37:51AM -0500, Kent West wrote:
> > > Søren Christensen wrote:
> > > > I've upgraded to Etch and Xorg on my laptop.
> > > >
> > > > How do I configure xorg to output on external VGA. There is no X on
> > > > projector, only tty, that is, I can follow booting on the projector, but
> > > > when gdm starts output dissappears.
> > > >
> > > > How can I configure the s-video output? I would like to show video from
> > > > DVD and from mpeg-streams.
> > > >
> > > > Severino
> > > >
> > > >
> > > >   
> > > I've never used s-video out, so I may just be generating noise. But on
> > > my Dell laptop, in order to get output from a projector plugged into the
> > > external VGA connector, I have to hit the key combo on the keyboard that
> > > switches output from the built-in LCD to the external connector. It's
> > > something like Fn-F2. This appears to me to be more controlled by the
> > > laptop's BIOS than by Debian/X. (I can't get a mirrored setup though;
> > > it's either internal or external, never both. Bummer.)
> > > 
> > 
> > I still haven't found an answer. dpkg-reconfigure xserver-xorg does not
> > find the external VGA, even when I turn on the projector when running
> > dpkg-reconfigure. I compared the conf-files from XFree86 and xorg, but
> > there where no differences. But with Sarge and Xfree86 the external VGA
> > mirroed the built in LCD -- now with Etch and xorg there is no output on
> > the external VGA. In both Sarge and Etch I was using gdm.
> > 
> > Does gdm control the output to the external VGA?
> > 
> 
> I doubt it. I think that most laptops set-up the video with two
> functions on the device. look at lspci -v of your video card, you'll
> likely see two listings along the lines of 
> 
> 0000:02:00.0 VGA compatible controller:...
> 
> and 
> 
> 0000:02:00.1 VGA compatible controller:...
> 
> one of these is the laptop screen and one is the external output. you
> need to point your xorg.conf to the appropriate one. You can set this
> when you dpkg-reconfigure xserver-xorg. THere is a question about
> entering the bus:device.function of the video device. If you actually
> specify the address then it will put that address into the
> xrog.conf. You should be able to find it in there. Set up two
> xorg.conf's: xorg.conf.laptop and xorg.conf.projector, for
> example. Then make xorg.conf a symlink that points to one or the
> other, depending on which you want to use. You will have to restart X
> to get it to select the one you want, but it should work. 
> 

Here is the output of lspci regarding VGA-controller. I do not see two
VGA-screens in this, but perhaps someone can help me discern it. I don't
understand why the external VGA worked with XFree86 (and Sarge) but not
with Xorg.


0000:01:05.0 VGA compatible controller: ATI Technologies Inc Radeon IGP 330M/340M/350M (prog-if 00 [VGA])
        Subsystem: Hewlett-Packard Company: Unknown device 002a
        Flags: bus master, stepping, fast Back2Back, 66MHz, medium devsel, latency 66, IRQ 255
        Memory at d8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 9000 [size=256]
        Memory at d0300000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at d0320000 [disabled] [size=128K]
        Capabilities: [58] AGP version 2.0
        Capabilities: [50] Power Management version 2


> Finally, you may be able to set up a dual-head display, if your laptop
> allows it, but that is beyond my experience.

Here is the complete output of lspci -v if that can be to any help.

Best regards and thanks for help so far.

Severino