I tried to get my G550 to dual head XFree86 using the fbdev instead of mga.
All I got was 2 screens on 1 monitor instead of 2 screens on 2 monitors.
Isn't it suppost to have screen 0 on specified monitor and screen 1 on
specified monitor?
Does fbdev even support dual-head. Is there a way to link screen 0 to
/dev/fb0 and screen 1 to /dev/fb1?

Bryan Hundven

Config as of now:
-----------------------------
Section "ServerLayout"
    Identifier "Dualhead"
    Screen      "Screen0"
    Screen      "Screen1" LeftOf "Screen0"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
    FontPath "unix/:-1"
EndSection

# Module loading section

Section "Module"
    Load  "dbe"        # Double-buffering
    # These arn't going to work under fbdev. Might as well speed up the
startup process :)
    # #Load  "GLcore"        # OpenGL support
    # #Load  "dri"        # Direct rendering infrastructure
    # #Load  "glx"        # OpenGL X protocol interface
    Load  "extmod"        # Misc. required extensions
    # Load  "v4l"        # Video4Linux
    # Load  "xtt"        # Default loading not freetype but xtt
    # Load  "speedo"        # Default loading Speed Font Library
    # Load  "type1"        # Default loading Type1 Font Library
    # Load  "pex5"        # PHIGS for X 3D environment (obsolete)
    # Load  "record"    # X event recorder
    # Load  "xie"        # X Image Extension (obsolete)
    # You only need the following two modules if you do not use xfs.
    # Load  "freetype"     # TrueType font handler
    # Load  "type1"        # Adobe Type 1 font handler
EndSection

Section "Keyboard"
# See /etc/X11/XF86Config
    XkbDisable
EndSection

Section "InputDevice"
    Identifier  "Mouse0"
    Driver      "mouse"
    Option      "Device" "/dev/input/mice"
    Option      "Protocol" "IMPS/2"
    Option      "Emulate3Buttons" "off"
    Option      "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
    Identifier "AOC Spectrum"
    VendorName "Unknown"
    ModelName  "Unknown"
    HorizSync 30-70
    VertRefresh 50-130
    Option "dpms"
EndSection

Section "Monitor"
    Identifier "Generic Monitor"
    VendorName "Unknown"
    ModelName  "Unknown"
    HorizSync 30-110
    VertRefresh 48-170
EndSection

Section "Device"
    Identifier "Matrox Millennium G550_1"
    Driver "mga"
    BoardName "Unknown"
    VideoRam 32768
    BusID "PCI:1:0:0"
    Screen 0
EndSection

Section "Device"
    Identifier "Matrox Millennium G550_2"
    Driver "mga"
    BoardName "Unknown"
    VideoRam 32768
    BusID "PCI:1:0:0"
    Screen 1
EndSection

Section "Device"
    Identifier "Linux Frame Buffer_1"
    Driver "fbdev"
    BoardName "Unknown"
EndSection

Section "Device"
    Identifier "Linux Frame Buffer_2"
    Driver "fbdev"
    BoardName "Unknown"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device "Linux Frame Buffer_1"
    Monitor "AOC Spectrum"
    DefaultDepth 16
    Subsection "Display"
        Depth 16
        Modes "1280x1024"
    EndSubSection
EndSection

Section "Screen"
    Identifier "Screen1"
    Device "Linux Frame Buffer_2"
    Monitor "Generic Monitor"
    DefaultDepth 16
    Subsection "Display"
        Depth 16
        Modes "1280x1024"
    EndSubSection
EndSection

Section "DRI"
    Mode 0666
EndSection

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