Pointeur de souris dans une configuration en double-écran

Bonjour,

Suite à la configuration en double-écran de ma Debian (etch), j’ai un problème avec le pointeur de souris (PS/2). Sur l’écran principal, tout est normal. Sur le second, le pointeur devient un carré de 2 cm de côté, dont le remplissage dépend vaguement de ce qui est affiché sur le moniteur 1.

Le problème est le même que dans ce sujet mais je relance vu qu’aucune explication ou solution n’a été proposée. A vrai dire, j’ai trouvé sur Internet ce problème évoqué plusieurs fois, mais jamais avec sa solution…

Pour configurer mon xorg.conf, j’ai utilisé la commande suivante (puisque j’ai une ATI comme carte graphique) :

Puis j’ai modifié à la main pour rectifier un certain nombre de choses.

Mon xorg.conf à moi en entier :

Section "ServerLayout"
	Identifier     "Default Layout"
	Screen         "aticonfig-Screen[0]" 0 0
	Screen         "aticonfig-Screen[1]" LeftOf "aticonfig-Screen[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  "GLcore"
	Load  "bitmap"
	Load  "dbe"
	Load  "ddc"
	Load  "dri"
	Load  "extmod"
	Load  "freetype"
	Load  "glx"
	Load  "int10"
	Load  "record"
	Load  "speedo"
	Load  "type1"
	Load  "vbe"
EndSection

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

Section "InputDevice"
	Identifier  "Configured Mouse"
	Driver      "mouse"
	Option	    "CorePointer"
	Option	    "Device" "/dev/input/mice"
	Option	    "Protocol" "ImPS/2"
EndSection

Section "Monitor"
	Identifier   "Dell 2408WFPb"
	HorizSync    30.0 - 83.0
	VertRefresh  56.0 - 75.0
	Option	    "DPMS"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[1]"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	HorizSync    31.0 - 81.0
	VertRefresh  56.0 - 76.0
	Option	    "DPMS" "true"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]"
	Driver      "fglrx"
	Option	    "DesktopSetup" "horizontal,reverse"
	Option	    "ScreenOverlap" "0"
	BusID       "PCI:1:0:0"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[1]"
	Driver      "fglrx"
	BusID       "PCI:1:0:0"
	Screen      1
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]"
	Device     "aticonfig-Device[0]"
	Monitor    "Dell 2408WFPb"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     1
		Modes    "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     4
		Modes    "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     8
		Modes    "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     15
		Modes    "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     16
		Modes    "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes    "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600"
	EndSubSection
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[1]"
	Device     "aticonfig-Device[1]"
	Monitor    "aticonfig-Monitor[1]"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     16
		Modes    "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes    "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "DRI"
	Mode         0666
EndSection

Merci d’avance pour votre aide, si vous êtes inspirés par le problème.