2 Monitors with Xinerama

[Andieh]

Hi There!

I have a problem here with my Samsung Q35 notebook and a second Flatpanel 
(Dell Ultrasharp with 1024x768). i want to get those two monitors working...
The Notebook has a intel i945gm chipset and a resolution of 1280x800.

But all i get is just a screen resolution of 1024x768 both on my notebook and 
external screen. 

I made 2 screenshots, and as you can see, there is something wrong. 
http://www.informatik.uni-frankfurt.de/~fuertig/upload/linux/img_5028.jpg
There is a piece of the second screen on the first screen. 
http://www.informatik.uni-frankfurt.de/~fuertig/upload/linux/img_5027.jpg
And here you can see, that i cant moove a window more right than that.

Im searching for a solution for a few days now and didnt find anything that 
helped me. Do i have to set up a virtual screen? Or isnt there any way to get 
to different resolutions on the different screens?

Thank you for your help
Andreas Fürtig
(if im wrong here, please tell me so)

Here is my xorg.conf:

Section "ServerFlags"
        Option "Xinerama" "On"
EndSection

Section "ServerLayout"
        Identifier     "X.org Configured"
        Screen         0  "ScreenQ"
        Screen         1  "ScreenD" RightOf "ScreenQ"
        Option         "Xinerama" "true"
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Mouse1" "AlwaysCore"
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
        RgbPath      "/usr/share/X11/rgb"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/misc"
        FontPath     "/usr/share/fonts/75dpi"
        FontPath     "/usr/share/fonts/100dpi"
        FontPath     "/usr/share/fonts/TTF"
        FontPath     "/usr/share/fonts/Type1"
EndSection

Section "Module"
        Load  "glx"
        Load  "extmod"
        Load  "xtrap"
        Load  "record"
        Load  "dbe"
        Load  "dri"
        Load  "freetype"
        Load  "type1"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "keyboard"
        Option      "XkbModel" "pc105"
        Option      "XkbLayout" "de"
EndSection

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mouse0"
        Option      "ZAxisMapping" "4 5 6 7"
EndSection

Section "InputDevice"
        Identifier  "Mouse1"
        Driver      "mouse"
        Option      "Protocol" "ImPS/2"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
        #DisplaySize      260   160     # mm
        Identifier   "MonitorQ"
        VendorName   "AUO"
        ModelName    "1314"
EndSection

Section "Monitor"
        Identifier   "MonitorD"
        VendorName   "DELL"
        HorizSync    28-49
        VertRefresh  43-72
EndSection

Section "Device"
        Identifier  "CardQ"
        Driver      "i810"
        VendorName  "Intel Corporation"
        BoardName   "Mobile 945GM/GMS/940GML Express Integrated Graphics 
Controller"

        BusID       "PCI:0:2:0"
        Screen      0
        Option      "MonitorLayout" "CRT, CRT+LFP"
EndSection

Section "Device"
        Identifier  "CardD"
        Driver      "i810"
        VendorName  "Intel Corporation"
        BusID       "PCI:0:2:0"
        Option      "MonitorLayout" "CRT, CRT+LFP"
        Screen 1
EndSection

Section "Screen"
        Identifier "ScreenQ"
        Device     "CardQ"
        Monitor    "MonitorQ"
        DefaultDepth 24
        SubSection "Display"
                Depth     24
                Modes     "1280x800"
        EndSubSection
EndSection

Section "Screen"
        Identifier "ScreenD"
        Device     "CardD"
        Monitor    "MonitorD"
        DefaultDepth 24
        SubSection "Display"
                Depth    24
                Modes    "1024x768"
        EndSubSection
EndSection