How to use a External screen or ProjectorYOCTO

How to use a External screen or ProjectorYOCTO

The screen of esdc2012Development board is too small for me, so i want to connect a external screen or project.Then, I connected a outside screen, and before yocto desktop booted, it works well. But, when the yocto booted completed, the out screen doesn`t work.....the out screen is not the staus of "NO INPUT", it looks like has received signal...but it is a black screen...Please help me to slove this problem... thanks~~

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如需更全面地了解编译器优化,请参阅优化注意事项

You need to modify your xorg.conf.
See mine for your information.

##

## X Config options generated from CED

## x11 conf skeleton

## DriverVer=

##



Section "Screen"

    Identifier    "Screen0"

    Device        "IntelEMGD-0"

    Monitor       "Monitor0"

    DefaultDepth  16

    SubSection    "Display"

    Depth         16

    Modes         "1280x1024"

    EndSubSection

EndSection



# Primary (First/only) display

Section "Device"

    Identifier "IntelEMGD-0"

    Driver     "emgd"

    VendorName "Intel DEG"

    BoardName  "Embedded Graphics"

    BusID      "0:2:0"

    Screen      0

    Option     "PcfVersion"            "1792"

    Option     "ConfigId"              "1"

    Option     "ALL/1/name"                   "800x480"

    Option     "ALL/1/General/PortOrder"      "24000"

    Option     "ALL/1/General/DisplayConfig"  "8"

    Option     "ALL/1/General/DisplayDetect"  "1"

    Option     "ALL/1/General/Refresh"        "60"

    Option     "ALL/1/General/TuningWA" "1"

    Option     "ALL/1/Port/4/General/name"           "LVDS"

    Option     "ALL/1/Port/4/General/EdidAvail"      "7"

    Option     "ALL/1/Port/4/General/EdidNotAvail"   "5"

    Option     "ALL/1/Port/4/General/Rotation"       "0"

    Option     "ALL/1/Port/4/General/Edid"           "1"

    Option     "ALL/1/Port/4/General/CenterOff"      "1"

    Option     "ALL/1/Port/4/FpInfo/BkltMethod"      "0"

    Option     "ALL/1/Port/4/Dtd/1/PixelClock"       "31746"

    Option     "ALL/1/Port/4/Dtd/1/HorzActive"       "800"

    Option     "ALL/1/Port/4/Dtd/1/HorzSync"         "60"

    Option     "ALL/1/Port/4/Dtd/1/HorzSyncPulse"    "140"

    Option     "ALL/1/Port/4/Dtd/1/HorzBlank"        "200"

    Option     "ALL/1/Port/4/Dtd/1/VertActive"       "480"

    Option     "ALL/1/Port/4/Dtd/1/VertSync"         "28"

    Option     "ALL/1/Port/4/Dtd/1/VertSyncPulse"    "31"

    Option     "ALL/1/Port/4/Dtd/1/VertBlank"        "45"

    Option     "ALL/1/Port/4/Dtd/1/Flags"            "0x8020000"

    Option     "ALL/1/Port/4/Attr/27"    "0"

    Option     "ALL/1/Port/4/Attr/26"    "18"

    Option     "ALL/1/Port/2/General/name"           "svdo"

    Option     "ALL/1/Port/2/General/EdidAvail"      "3"

    Option     "ALL/1/Port/2/General/EdidNotAvail"   "4"

    Option     "ALL/1/Port/2/General/Rotation"       "0"

    Option     "ALL/1/Port/2/General/Edid"           "1"

    Option     "ALL/1/Port/2/General/CenterOff"      "1"

#    Option     "ALL/2/Port/2/Dtd/1/PixelClock"       "31746"

#    Option     "ALL/2/Port/2/Dtd/1/HorzActive"       "800"

#    Option     "ALL/2/Port/2/Dtd/1/HorzSync"         "60"

#    Option     "ALL/2/Port/2/Dtd/1/HorzSyncPulse"    "140"

#    Option     "ALL/2/Port/2/Dtd/1/HorzBlank"        "200"

#    Option     "ALL/2/Port/2/Dtd/1/VertActive"       "480"

#    Option     "ALL/2/Port/2/Dtd/1/VertSync"         "28"

#    Option     "ALL/2/Port/2/Dtd/1/VertSyncPulse"    "31"

#    Option     "ALL/2/Port/2/Dtd/1/VertBlank"        "45"

#    Option     "ALL/2/Port/2/Dtd/1/Flags"            "0x8020000"

EndSection



Section "ServerLayout"

        InputDevice "EETI" "SendCoreEvents"
    Identifier     "Default Layout"

    Screen 0       "Screen0" 0 0

    Screen 1       "Screen1" RightOf "Screen0"

   # InputDevice    "Mouse0" "CorePointer"

   # InputDevice    "Keyboard0" "CoreKeyboard"

   # InputDevice    "DevInputMice" "SendCoreEvents"

EndSection



Section "Screen"

    Identifier    "Screen1"

    Device        "IntelEMGD-1"

    Monitor       "Monitor1"

    DefaultDepth  16

    SubSection    "Display"

    Depth         16

    Modes         "800x480"

    EndSubSection

EndSection



# Secondary (for dual-head only) display

Section "Device"

    Identifier "IntelEMGD-1"

    Driver     "emgd"

    VendorName "Intel DEG"

    BoardName  "Embedded Graphics"

    BusID      "0:2:0"

    Screen     1

    Option     "PcfVersion"            "1792"

    Option     "ConfigId"              "1"

    Option     "ALL/1/name"                   "800x480"

    Option     "ALL/1/General/PortOrder"      "42000"

    Option     "ALL/1/General/DisplayConfig"  "8"

    Option     "ALL/1/General/DisplayDetect"  "1"

    Option     "ALL/1/General/Refresh"        "60"

EndSection



Section "ServerFlags"

#    Option    "Xinerama"  "True"

EndSection

### Touch Configuration Beginning ###
Section "InputDevice"
        Identifier "EETI"
        Driver "egalax"
        Option "Device" "usbauto"
        Option "Parameters" "/var/lib/eeti.param"
        Option "ScreenNo" "1"
EndSection
### Touch Configuration End ###

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