Someone

Section "dri" # 3d
    Mode 0666
EndSection

Section "Module"
    SubSection  "extmod"
        Option  "omit xfree86-dga"
    EndSubSection
    Load        "extmod"
    Load        "dbe"
    Load        "freetype"
    Load        "type1"
    Load        "glx"
    Load        "dri"
    Load        "randr"
EndSection

Section "Files"
    RgbPath     "/usr/X11R6/lib/X11/rgb.txt"
    FontPath    "/usr/local/share/fonts/local/"
    FontPath    "/usr/local/share/fonts/misc/"
    FontPath    "/usr/local/share/fonts/75dpi/:unscaled"
    FontPath    "/usr/local/share/fonts/100dpi/:unscaled"
    FontPath    "/usr/local/share/fonts/Type1/"
    FontPath    "/usr/local/share/fonts/TTF/"
    FontPath    "/usr/local/share/fonts/75dpi/"
    FontPath    "/usr/local/share/fonts/100dpi/"
    ModulePath  "/usr/X11R6/lib/modules"
EndSection

Section "InputDevice"
    Identifier "Keyboard 0"
    Driver     "kbd"
    Option     "XkbRules"   "xorg"
    Option     "XkbModel""pc104"
    Option     "XkbLayout""us"
EndSection

Section "InputDevice"
    Identifier            "Mouse 0"
    Driver                "mouse"
    Option "Protocol"     "sysmouse"
    Option "Device"       "/dev/sysmouse"
    Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
    Identifier  "CRT1"
    HorizSync   31.5 - 75
    VertRefresh 50 - 70
    Option      "DPMS"
EndSection

Section "Device"

    Identifier                   "radeon"
    Driver                       "radeon"
    #Option "MonitorLayout"      "TMDS, CRT" # TMDS is Desktop flat panel
    Option "MergedFB"            "true"
    Option "AGPMode"             "4"
    Option "DDCMode"             "false"
    Option "MergedFB"            "true"
    Option "CRT2HSync"           "31.5-75"
    Option "CRT2VRefres          "50-70"
    Option "CRT2Posit            "RightOf"
    Option "MetaModes"           "1280x1024-1280x1024"
    BusID  "PCI:1:0:0"
    Screen 0

EndSection

Section "Screen"
    Identifier  "Screen0"
    Device      "radeon"
    Monitor     "CRT1"
    DefaultDepth 24
    Virtual 2560 1024
    Subsection "Display"
        Depth    24
        Modes   "1280x1024"    
    EndSubSection
EndSection


Section "ServerLayout"
    Identifier  "Server Layout"
    Screen      0 "Screen0" 0 0
    InputDevice "Mouse 0"    "CorePointer"
    InputDevice "Keyboard 0" "CoreKeyboard"
EndSection