start with external display only

Did anyone manage to start with external Display switched on and no internal LCD? Anyone got an working xorg.conf? I know, I could start normal and switch over with xrandr but this is not a solution for me. I tried to work with BusID "PCI:0:2:1" but this is not working...

Don't worry about the 800x480 for the external Display - it's a 7" CarTFT - I'm working on a CarPC

my xorg.conf:

Code:

Section "Device"
       Identifier    "945GME"
       Driver        "intel"
       BusID         "PCI:0:2:0"
       Option        "monitor-TV"   "TV"
EndSection

Section "Monitor"
        Identifier    "VGA"
        HorizSync     31.5 - 37.9
        VertRefresh   50.0 - 70.0
        ModeLine      "800x480" 31.7 800 861 941 1000 480 501 504 525 -hsync -vsync
        Option        "DPMS" "Off"
EndSection

Section "Monitor"
        Identifier    "LVCD"
        Option        "DPMS" 
EndSection

Section "Screen"
    Identifier        "LVCD_only"
    Monitor           "LVCD"
    Device            "945GME"
    SubSection        "Display"
        Depth             24
        Modes             "1024x600"
        Virtual           2048 2048
    EndSubSection
EndSection

Section "ServerLayout"
    Identifier     "Default Layout"
    Screen         "LVCD_only"
    InputDevice    "Keyboard" "CoreKeyboard"
    InputDevice    "Synaptics Touchpad"
    InputDevice    "Mouse" "CorePointer"
    InputDevice    "Touchscreen" 
EndSection

Thanks! nodge

 

The main issue is the calibration of the touchscreen, because during switching over to the external display with xrandr it gets messed up. The touchscreen calibration is done on the 1024x600 and not for 800x480.

Anyone?!
nodge