Bug#451876: xserver-xorg-core: screen mode selection error

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

ale wrote:
> Package: xserver-xorg-core
> Version: 2:1.4.1~git20071117-1
> Severity: normal
> 
> Hello,
> 
> I have a custom modeline 1400x1050 in my xorg.conf. However, after the
> last upgrade of xorg, this mode stopped working and even doesn't show up
> in xrandr. It seems the relevant portions of xorg.conf are not even read.

I was just debugging a similar issue on IRC. The problem probably comes
from:
  (**) |-->Screen "Default Screen" (0)
  (**) |   |-->Monitor "<default monitor>"
  (==) No device specified for screen "Default Screen".
          Using the first device section listed.
  (**) |   |-->Device "Generic Video Card"
  (==) No monitor specified for screen "Default Screen".
          Using a default monitor configuration.

This is wrong. There is no reason for these to appear when your config
contains:
  Section "Screen"
        Identifier      "Default Screen"
        Device          "Generic Video Card"
        Monitor         "Generic Monitor"

You might be able to work around the problem by adding
  Option "Monitor-VGA-0" "Generic Monitor"
to your Device section (or Monitor-DVI-0 if the monitor is plugged on DVI).

But this only works for RandR 1.2 drivers. I feel like all non-RandR 1.2
drivers are going to be broken (ignore the monitor section).


We need David's input here since he added some patches for
autoconfiguration. I'd like to push this bug upstream as soon as
possible, but I'd rather be sure it's not our fault first :)

Brice