[H-GEN] G400 Dual Head

[pag at pisoftware.com]

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Quoting Robert Kearey <mammal at optushome.com.au>:

> > I have recently reinstalled Red Hat 7.3 and Ximian Gnome Desktop on my
> > workstation and have tried to get my Matrox G400 dual head video card
> > working in dual head mode under Linux with no luck. 
> 
> You have two options:
> 
> * use the binary Matrox hallib drivers
> * use a pair of fb devices

I didn't know you could use dual fb devices... but you won't get any
acceleration.  It depends on whether you want it.

The Matrox drivers work great.  Unfortunately they don't do 3D.  :-(  As such, I
have to restart X with the XFree86 Matrox driver and go back to a single head in
order to play games like Armagetron or Quake3.
Relevant snippets from /etc/X11/XF86Config-4 include:

-------------
Section "Device"
        Identifier      "G400"
        Driver "mga"
        BusID "PCI:1:0:0"
        Screen 0
EndSection

Section "Device"
        Identifier      "G400 head2"
        Driver "mga"
        BusID "PCI:1:0:0"
        Screen 1
EndSection
Section "Monitor"
        Identifier      "Trinitron 17inch"
        HorizSync       30-85
        VertRefresh     48-120
        Option          "DPMS"
EndSection

Section "Monitor"
        Identifier      "DiamondView 17inch"
        HorizSync       30-72
        VertRefresh     50-120
        Option          "DPMS"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "G400"
        Monitor         "Trinitron 17inch"
        DefaultDepth    16
        SubSection "Display"
                Depth           16
                Modes           "1024x768" "800x600" 
        EndSubSection
EndSection

Section "Screen"
        Identifier      "Second Screen"
        Device          "G400 head2"
        Monitor         "DiamondView 17inch"
        DefaultDepth    16
        SubSection "Display"
                Depth           16
                Modes           "1024x768" "800x600" 
        EndSubSection
EndSection

Section "ServerLayout"
        Identifier      "Default Layout"
        Screen          0 "Default Screen"
        Screen          1 "Second Screen" LeftOf "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "USB Mouse"
        Option          "Xinerama"
EndSection
--------------

Paul Gearon

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