Je ne savais pas trop ce qui pouvais te servir alors je te mets tout :$
Section "ServerLayout"
     Identifier     "Default Layout"
     Screen      0  "aticonfig-Screen[0]" 0 0
     InputDevice    "Generic Keyboard"
     InputDevice    "Configured Mouse"
EndSection
Section "Files"
     # path to defoma fonts
     FontPath     "/usr/share/fonts/X11/misc"
     FontPath     "/usr/X11R6/lib/X11/fonts/misc"
     FontPath     "/usr/share/fonts/X11/cyrillic"
     FontPath     "/usr/X11R6/lib/X11/fonts/cyrillic"
     FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
     FontPath     "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
     FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
     FontPath     "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
     FontPath     "/usr/share/fonts/X11/Type1"
     FontPath     "/usr/X11R6/lib/X11/fonts/Type1"
     FontPath     "/usr/share/fonts/X11/100dpi"
     FontPath     "/usr/X11R6/lib/X11/fonts/100dpi"
     FontPath     "/usr/share/fonts/X11/75dpi"
     FontPath     "/usr/X11R6/lib/X11/fonts/75dpi"
     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"
EndSection
Section "InputDevice"
     Identifier  "Generic Keyboard"
     Driver      "kbd"
     Option         "CoreKeyboard"
     Option         "XkbRules" "xorg"
     Option         "XkbModel" "pc105"
     Option         "XkbLayout" "fr"
     Option         "XkbVariant" "latin9"
EndSection
Section "InputDevice"
     Identifier  "Configured Mouse"
     Driver      "mouse"
     Option         "CorePointer"
     Option         "Device" "/dev/input/mice"
     Option         "Protocol" "ImPS/2"
     Option         "Emulate3Buttons" "true"
EndSection
Section "Monitor"
     Identifier   "Philips 190C"
     Option         "DPMS"
EndSection
Section "Monitor"
     Identifier   "aticonfig-Monitor[0]"
     Option         "VendorName" "ATI Proprietary Driver"
     Option         "ModelName" "Generic Autodetecting Monitor"
     Option         "DPMS" "true"
EndSection
Section "Device"
     Identifier  "ATI Technologies Inc RV280 [Radeon 9200 PRO]"
     Driver      "fglrx"
     BusID       "PCI:1:0:0"
EndSection
Section "Device"
     Identifier  "aticonfig-Device[0]"
     Driver      "fglrx"
EndSection
Section "Screen"
     Identifier "Default Screen"
     Device     "ATI Technologies Inc RV280 [Radeon 9200 PRO]"
     Monitor    "Philips 190C"
     DefaultDepth     24
     SubSection "Display"
          Depth     1
          Modes    "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
     EndSubSection
     SubSection "Display"
          Depth     4
          Modes    "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
     EndSubSection
     SubSection "Display"
          Depth     8
          Modes    "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
     EndSubSection
     SubSection "Display"
          Depth     15
          Modes    "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
     EndSubSection
     SubSection "Display"
          Depth     16
          Modes    "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
     EndSubSection
     SubSection "Display"
          Depth     24
          Modes    "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
     EndSubSection
EndSection
Section "Screen"
     Identifier "aticonfig-Screen[0]"
     Device     "aticonfig-Device[0]"
     Monitor    "aticonfig-Monitor[0]"
     DefaultDepth     24
     SubSection "Display"
          Viewport   0 0
          Depth     24
     EndSubSection
EndSection
Section "DRI"
     Mode         0666
EndSection
Merci                                                            
                                
Shai,
la boite à BI. 
(tu le changes je mord)