After some work and researching the Internet, I've been able to get the dual monitors working on the UbuntuLinux with my old ATI 8500 LE dual video display card which displays 1280x1024 great on dual monitors on my two Dell FP1901 19" monitors!

I used the following URL to determine how to make this work: http://ubuntuforums.org/showthread.php?t=221174 and followed the MergedFB path to setup Dual Monitors on Ubuntu Linux since that worked well for the ATI graphics cards.

I used the lspci command to show what BusID for the graphics card to use in the VideoCard0 setup below. The other thing is to get your monitor's horizontal and vertical refresh rates and put those in the Monitor and VideoCard setups.

I ended up tweaking the /etc/X11/xorg.conf file to be the following:

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf(5) manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#http://itdiscuss.org/twiki/bin/view/TWiki/TextFormattingRules
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
        Identifier      "Dual Head Config"
        Screen 0        "Screen0" 0 0
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
        InputDevice     "stylus"        "SendCoreEvents"
        InputDevice     "cursor"        "SendCoreEvents"
        InputDevice     "eraser"        "SendCoreEvents"
EndSection

Section "Files"
        FontPath        "/usr/share/fonts/X11/misc"
        FontPath        "/usr/share/fonts/X11/cyrillic"
        FontPath        "/usr/share/fonts/X11/100dpi/:unscaled"
        FontPath        "/usr/share/fonts/X11/75dpi/:unscaled"
        FontPath        "/usr/share/fonts/X11/Type1"
        FontPath        "/usr/share/fonts/X11/100dpi"
        FontPath        "/usr/share/fonts/X11/75dpi"
        # path to defoma fonts
        FontPath        "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
        Load    "i2c"
        Load    "bitmap"
        Load    "ddc"
        Load    "dri"
        Load    "extmod"
        Load    "freetype"
        Load    "glx"
        Load    "int10"
        Load    "vbe"
        Load    "v4l"
EndSection

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "kbd"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xorg"
        Option          "XkbModel"      "pc105"
        Option          "XkbLayout"     "us"
EndSection

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "ImPS/2"
        Option          "ZAxisMapping"          "4 5"
        Option          "Emulate3Buttons"       "true"
EndSection

Section "InputDevice"
        Driver          "wacom"
        Identifier      "stylus"
        Option          "Device"        "/dev/input/wacom"
        Option          "Type"          "stylus"
        Option          "ForceDevice"   "ISDV4"         # Tablet PC ONLY
EndSection

Section "InputDevice"
        Driver          "wacom"
        Identifier      "eraser"
        Option          "Device"        "/dev/input/wacom"
        Option          "Type"          "eraser"
        Option          "ForceDevice"   "ISDV4"         # Tablet PC ONLY
EndSection

Section "InputDevice"
        Driver          "wacom"
        Identifier      "cursor"
        Option          "Device"        "/dev/input/wacom"
        Option          "Type"          "cursor"
        Option          "ForceDevice"   "ISDV4"         # Tablet PC ONLY
EndSection

Section "Device"
        Identifier      "Generic Video Card"
        Driver          "vesa"
        BusID           "PCI:1:0:0"
EndSection

Section "Monitor"
        Identifier      "Monitor0"
        Option          "DPMS"
        HorizSync       30-80
        VertRefresh     56-76
EndSection

Section "Device"
        Identifier "Videocard0"
        Driver "radeon"
        VendorName "ATI Technologies Inc"
        BoardName "Radeon generic"
        Option "MergedFB" "true"
        Option "ColorTiling" "on"
        Option "AddARGBGLXVisuals" "True"
        Option "MonitorLayout" "CRT,CRT"
        Option "CRT2HSync" "30-80"
        Option "CRT2VRefresh" "56-76"
        Option "CRT2Position" "RightOf"
        Option "MetaModes" "1280x1024-1280x1024" # Monitor Resolutions 
        Option "MergedXinerama" "true"
        BusID "PCI:1:0:0"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device "Videocard0"
        Monitor "Monitor0"
        DefaultDepth 24
        SubSection "Display"
                Viewport 0 0
                Depth 24
                Modes "1280x1024" "1024x768"
        EndSubSection
EndSection

Section "Extensions"
        Option "Composite" "True"
EndSection

Section "DRI"
        Group 0
        Mode 0666
EndSection

-- JeffreyThompson - 29 May 2007