Section "Device"
     Identifier "Matrox Millennium G450"
     Driver "mga"
     #Driver "vesa"  # works
     #Driver "fbdev"  # works
     #Option "NoAccel" "true"  # makes "mga" driver work
EndSection

Section "Monitor"
     Identifier "My Monitor"
     HorizSync 31-80
     VertRefresh 56-75
EndSection

Section "Screen"
     Identifier "Default Screen"
     Device "Matrox Millennium G450"
     Monitor "My Monitor"
     DefaultDepth 8
     #DefaultDepth 24  # makes accelerated "mga" driver work

     # Enabling either one of these
     # makes accelerated "mga" driver work
     #Option "XaaNoScreenToScreenCopy" "true"
     ### OR ###
     #Option "XaaNoOffscreenPixmaps" "true"

     SubSection "Display"
          Depth 8
          #Modes "1280x1024"
          Modes "1024x768"
     EndSubSection
     SubSection "Display"
          Depth 24
          #Modes "1280x1024"
          Modes "1024x768"
     EndSubSection

EndSection