Comment 4 for bug 99158

Here you can see my xorg.conf configured with my ati radeon 9200 (rv280) and my Acer monitor AL1715

# /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 /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/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.
#
# 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 "Files"
 FontPath "/usr/share/X11/fonts/misc"
 FontPath "/usr/share/X11/fonts/cyrillic"
 FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
 FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
 FontPath "/usr/share/X11/fonts/Type1"
 FontPath "/usr/share/X11/fonts/100dpi"
 FontPath "/usr/share/X11/fonts/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 "type1"
 Load "vbe"
EndSection

Section "Extensions"
        Option "RENDER" "Enable"
EndSection

Section "DRI"
 Mode 0666
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" "ExplorerPS/2"
 Option "ZAxisMapping" "4 5"
 Option "Emulate3Buttons" "true"
EndSection

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

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

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

Section "Device"
 Identifier "ATI Technologies, Inc. RV280 [Radeon 9200 PRO]"
 Driver "radeon"
 BusID "PCI:1:0:0"
# Option "XAANoOffscreenPixmaps" # Faster RENDER acceleration ###
# VideoRam 131072 # 128 MB VRAM ###
 Option "AccelMethod" "XAA" # Use XFree86 Acceleration Architecture #
 Option "AccelDFS" "0" # pour ATI 9250
 Option "AGPMode" "8" # AGP- 8 fonctionne mois bien
 Option "AGPSize" "128" # AGP aperture size - 128 fonctionne moins bien
 Option "GARTSize" "64" # TEST
 Option "RingSize" "8"
 Option "BufferSize" "2"
 Option "EnablePageFlip" "1" # Enable page flipping for 3D apps
 Option "ColorTiling" "1"
 Option "EnableDepthMoves" "yes"
 Option "UseFBDev" "false"
 Option "RenderAccel" "true" # Enable the hardware render acceleration
 Option "mtrr" "on"
 Option "SubPixelOrder" "none"
 Option "DynamicClocks" "on"
# Option "BackingStore" "true" # Faster double buffering ###
 Option "DPMS"
 Option "DRI" "true"
EndSection

Section "Monitor"
 Identifier "AL1715"
 Option "DPMS"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Device "ATI Technologies, Inc. RV280 [Radeon 9200 PRO]"
 Monitor "AL1715"
 DefaultDepth 24
 SubSection "Display"
  Depth 1
  Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 4
  Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 8
  Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 15
  Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 16
  Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 24
  Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
 EndSubSection

 Option "AddARGBGLXVisuals" "True"
 Option "DisableGLXRootClipping" "True"
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
 InputDevice "Generic Keyboard"
 InputDevice "Configured Mouse"
 InputDevice "stylus" "SendCoreEvents"
 InputDevice "cursor" "SendCoreEvents"
 InputDevice "eraser" "SendCoreEvents"

 option "offtime" "30"
 Option "AIGLX" "true" # Nécessaire pour beryl
EndSection