problems with ati 9600 xinerama

[Alex Deucher]

On Sun, 28 Nov 2004 10:22:54 +0100, Matthieu Herrb
<matthieu.herrb at laas.fr> wrote:
> Chuck Mead wrote:
> 
> 
> 
> > I finally gave up on classic ximerama with this card and with
> > the help of a user on freenode:#xorg I got the desktop I had been
> > wanting using this config:
> >
> > Section "Device"
> >         Identifier  "Videocard0"
> >         Driver      "radeon"
> >         VendorName  "ATI"
> >         BoardName   "ATI Radeon 9600"
> >         BusID       "PCI:1:0:0"
> >         Option "MergedFB" "True"
> >         Option "CRT2HSync" "30-70"
> >         Option "CRT2VRefresh" "50-160"
> >         Option "MonitorLayout" "CRT,CRT"
> >         Option "OverlayOnCRTC2" "true"
> >          Option "MetaModes" "1280x1024-1280x1024"
> >         Option "CRT2Position" "RightOf"
> > EndSection
> >
> 
> Though, it may be interesting to understand why "traditional" dual-head
> doesn't work anymore with radeons.
> 
> I have a 9200 which also seem to only be able to use mergedfb with
> X.Org, and I've one report of a OpenBSD user who was using traditional
> multi-head on XFree86 4.4 with a radeon 7000, but cannot get it working
> with X.Org 6.8.1.
> 

traditional multi-head should work as well.  It does on all my
mult-head radeon cards.  for it to work you will need two devices
sections with the same pci id and one with screen 0 and one with
screen 1.  monitor detection has regressed on some systems in 6.8.x
and can be fixed with this patch:
https://bugs.freedesktop.org/show_bug.cgi?id=1559
Without that patch, you can force the outputs to what you want using
the Monitorlayout option in the screen 0 device config section of your
xorg.conf:
Option     "MonitorLayout" "CRT, CRT"


Alex

> --
>                                         Matthieu
> 
>