For all of those Radeon VE users out there with two displays trying desparately to
get away from Windows and use the video card to its full potential under Linux/X11,
you'll need version XFree86 version 4.2.0 (released January 2002) along with an
XF86Config file, such as the one I use on my Debian GNU/Linux 3.0 based dual 
PIII/933MHz "daily driver", Pyrite:
Section "Module"
# This loads the DBE extension module.
    Load        "dbe"  	# Double buffer extension
# This loads the miscellaneous extensions module, and disables
# initialisation of the XFree86-DGA extension within that module.
    SubSection  "extmod"
      Option    "omit xfree86-dga"   # don't initialise the DGA extension
    EndSubSection
# This loads the Type1 and FreeType font modules
    Load        "type1"
    Load        "freetype"
# This loads the GLX module
#    Load       "glx"
EndSection
Section "Files"
# The location of the RGB database.  Note, this is the name of the
# file minus the extension (like ".txt" or ".db").  There is normally
# no need to change the default.
    RgbPath	"/usr/X11R6/lib/X11/rgb"
#    FontPath   "/usr/X11R6/lib/X11/fonts/local/"
    FontPath   "/usr/X11R6/lib/X11/fonts/misc/"
    FontPath   "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
    FontPath   "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
    FontPath   "/usr/X11R6/lib/X11/fonts/Type1/"
    FontPath   "/usr/X11R6/lib/X11/fonts/Speedo/"
    FontPath   "/usr/X11R6/lib/X11/fonts/75dpi/"
    FontPath   "/usr/X11R6/lib/X11/fonts/100dpi/"
# The module search path.  The default path is shown here.
#    ModulePath "/usr/X11R6/lib/modules"
EndSection
Section "ServerFlags"
  Option "Xinerama" "on"
EndSection
Section "InputDevice"
    Identifier	"Keyboard1"
    Driver	"Keyboard"
    Option "AutoRepeat" "500 30"
# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
#    Option	"Xleds"      "1 2 3"
#    Option "LeftAlt"     "Meta"
#    Option "RightAlt"    "ModeShift"
# If you'd like to switch the positions of your capslock and
# control keys, use:
#    Option "XkbOptions"  "ctrl:swapcaps"
    Option "XkbRules"	"xfree86"
    Option "XkbModel"	"pc104"
    Option "XkbLayout"	"us"
EndSection
Section "InputDevice"
    Identifier	"Mouse1"
    Driver	"mouse"
    Option "Protocol"    "ps/2"
    Option "Device"      "/dev/mouse"
EndSection
Section "Monitor"
    Identifier  "Mag 986FS"
    HorizSync   31.5 - 79.0
    VertRefresh 40-150
EndSection
Section "Monitor"
    Identifier  "K9054"
    HorizSync   31.5 - 95.0
    VertRefresh 50-160
EndSection
Section "Device"
    Identifier  "RadeonVE"
    VendorName  "ATI"
    BoardName   "Unknown"
    Driver      "ati"
    BusID       "PCI:1:0:0"
    Screen       0
EndSection
Section "Device"
    Identifier  "RadeonVE2"
    VendorName  "ATI"
    BoardName   "Unknown"
    Driver      "ati"
    BusID       "PCI:1:0:0"
    Screen       1
EndSection
Section "Screen"
    Identifier  "Screen 1"
    Device      "RadeonVE"
    Monitor     "Mag 986FS"
    DefaultDepth 16
    Subsection "Display"
        Depth       8
        Modes       "1280x1024" "640x480" "800x600" "1024x768"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       16
        Modes       "1280x1024" "640x480" "800x600" "1024x768"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       24
        Modes       "1280x1024" "640x480" "800x600" "1024x768"
        ViewPort    0 0
    EndSubsection
EndSection
Section "Screen"
    Identifier  "Screen 0"
    Device      "RadeonVE2"
    Monitor     "K9054"
    DefaultDepth 16
    Subsection "Display"
        Depth       8
        Modes       "1280x1024" "640x480" "800x600" "1024x768"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       16
        Modes       "1280x1024" "640x480" "800x600" "1024x768"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       24
        Modes       "1280x1024" "640x480" "800x600" "1024x768"
        ViewPort    0 0
    EndSubsection
EndSection
Section "ServerLayout"
    Identifier  "Dual Monitor Layout"
    Screen 0 "Screen 0" 0 0
    Screen 1 "Screen 1" Rightof "Screen 0"
    InputDevice "Mouse1" "CorePointer"
    InputDevice "Keyboard1" "CoreKeyboard"
EndSection