Dual Head doesn't work

[drew einhorn]

On Sun, May 18, 2008 at 4:49 PM, James Gray <james at gray.net.au> wrote:

> drew einhorn wrote:
>
> > I have a couple of ATI cards.  Here's the output from lspci:
> >
> > 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV200 QW
> > [Radeon 7500]
> > 02:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon
> > 9200 PRO] (rev 01)
> > 02:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 PRO]
> > (Secondary) (rev 01)
>
> -->8-- SNIPPED -->8--
>
> > Section "Screen"
> >         Identifier      "Screen0"
> >         Device          "0 ATI Technologies Inc Radeon RV200 QW [Radeon
> > 7500]"
> >         Monitor         "ULTRASCAN1600HS"
> >         DefaultDepth    24
> >         SubSection "Display"
> >                    Modes "1600x1200" "1280x1024" "1024x768" "800x600"
> "640x480"
> >         EndSubSection
> > EndSection
> >
> > Section "Screen"
> >         Identifier "Screen1"
> >         Device "1 ATI Technologies Inc Radeon RV280 [Radeon 9200 PRO]"
> >         Monitor "ULTRASCANP99"
> >         Defaultdepth 24
> >         SubSection "Display"
> >                 Depth 24
> >                 Modes "1400x1050"
> >         EndSubSection
> > EndSection
>
> -->8-- SNIPPED -->8--
>
> > It almost works.  Both Desktops come up.
> > Except the pixels at right and left edges of the desktop are are all
> > squised together
> > into a bright lines.  Everything to the left of "ations" in the
> > "Applications" pulldown
> > is missing on the left and everything to the right of May in the Date.
>
> -->8-- SNIPPED -->8--
>
> > (==) ServerLayout "DualHead"
> > (**) |-->Screen "Screen0" (0)
> > (**) |   |-->Monitor "ULTRASCAN1600HS"
> > (**) |   |-->Device "0 ATI Technologies Inc Radeon RV200 QW [Radeon
> 7500]"
> > (**) |-->Screen "Screen1" (1)
> > (**) |   |-->Monitor "ULTRASCANP99"
> > (**) |   |-->Device "1 ATI Technologies Inc Radeon RV280 [Radeon 9200
> PRO]"
> > (**) |-->Input Device "Generic Keyboard"
> > (**) |-->Input Device "Configured Mouse"
>
> -->8-- SNIPPED -->8--
>
> > (II) Primary Device is: PCI 01:00:0
> > (WW) RADEON: No matching Device section for instance (BusID PCI:2:0:1)
> found
>
> -->8-- SNIPPED -->8--
>
> > (--) RADEON(1): Chipset: "ATI Radeon 9250 5960 (AGP)" (ChipID = 0x5960)
>
> -->8-- SNIPPED -->8--
>
> > (WW) RADEON(0): No crtc mode list for crtc 1,continuing with desired mode
> > disable montype: 1
> -->8-- SNIPPED -->8--
>
> > (WW) RADEON(1): No crtc mode list for crtc 1,continuing with desired mode
> > disable montype: 1
>
> By the look of this, you've specified modes in the screen sections
> (above) but there is no matching ModeLine.  So the X server is doing its
> best to give you the resolution you asked for but the monitor timing is
> all off which is giving you the display aberrations.
>
> Simple solution:
> 1. Google "X modeline calculator" (there are tons!)
> 2. Feed in the monitor scan ranges etc as required.
> 3. Cut-and-paste the generated modeline into the appropriate "Screen"
> section of /etc/X11/xorg.conf
> 4. Restart X.
>

That certainly sounds plausible.

But when I added a ModeLine to the Screen section X failed to start up
properly, was getting a parse error on the xorg.conf file.  Turns out that
it goes in the Monitor section.   Now I don't get the parse error any more
but the X is ignoring  ModeLine and my attempts to configure Screen1.

Looking more closely at the Xorg.0.log I see that it is coming up in
1600x1200.

Tried reconfiguring Screen1 with the GUI tools but they don't work either.

And we still haven't a clue about why the cursor gets stuck in Screen1 and
is unable to return to Screen0 where it began.

Has anybody succeeded in getting dual head working on hardy with ati cards?

I'm beginning to suspect that may not be a configuration problem, the
drivers may be broken.


>
> Hope that helps :)
>
> Cheers,
>
> James
>
>
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-- 
Drew Einhorn
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