[PLUG] Matrox G400 AGP dual head

["Bhaskar Maddala" <maddalab@gmail.com>]

Hello,

  I have been struggling to set up my dual monitor machine for a couple of days and thought that someone here might be able to help. Any help is much appreciated.

I am using a Matrox Millenium G450 dual-head video card
(AGP) with Ubuntu 8.10. I would like to be able to stretch my desktop across both
screens. At this time I have two copies of the same desktop on both screens.

Output from lspci

00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
00:01.0 PCI bridge: Intel Corporation 82865G/PE/P PCI to AGP Controller (rev 02)



00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 (rev 02)



00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)



00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02)



00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400/G450 (rev 82)



02:0c.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 02)

I edited the default xorg.conf file obtained by 
sudo dpkg-reconfigure -phigh xserver-org

to be the following (I did try many permutations and combinations along the way -- with information obtained from the internet -- without much success)

Section "Device"
    Identifier    "Video Device"
        Driver "mga"
        BusID   "PCI:1:0:0"
EndSection

Section "Monitor"
    Identifier    "Monitor 1"
EndSection

Section "Monitor"
    Identifier    "Monitor 2"
EndSection

Section "Screen"
    Identifier    "Screen 1"
    Monitor        "Monitor 1"
    Device        "Video Device"
EndSection

Section "Screen"
    Identifier    "Screen 2"
    Monitor        "Monitor 2"
    Device        "Video Device"
EndSection

Section "ServerLayout"
        Identifier "Default Layout"
        Screen "Screen 1"
        Screen "Screen 2" RightOf "Screen 1"
EndSection

Section "ServerFlags"
        Option "xinerama" "true"
EndSection

Thanks
Bhaskar
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