AutoAddDevices and Adding Known Devices

[Mark Depto]

Hello Folks,


I am trying to manually configure a eGalax touchscreen using the evdev driver which is currently working great. The problem I am having is that allowing Xorg to autoconfigure the devices from udev results in ~100% cpu utilization as soon as the touchscreen is touched with the USB keyboard and mouse connected. I found a thread that this is a bug somewhere along the lines, but the the workaround is to use the "Option AutoAddDevices false". I have done this is and all is well, except for when I actually need to use a mouse or the keyboard while developing my applications. With AutoAddDevices set to off, I can't can't configure an InputClass to save my soul and I am all out of ideas. Would you have any insight how I could manually tell Xorg to use the keyboard and mouse when present? 

My xorg.conf:

<code>
 
Section "ServerFlags"

  Option       "AutoAddDevices"   "false"
EndSection

Section "ServerLayout"
        Identifier      "Touchscreen Configuration"
        Screen          "Screen0"
        #InputDevice     "Mouse0"    "CorePointer"
        InputDevice     "Keyboard0" "CoreKeyboard"
        InputDevice     "touchscreen0"
EndSection

Section "Files"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/X11/misc"
        FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/Type1"
        FontPath     "/usr/share/fonts/X11/100dpi"
        FontPath     "/usr/share/fonts/X11/75dpi"
        FontPath     "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
        FontPath     "built-ins"
EndSection

Section "Module"
        Load  "extmod"
        Load  "dbe"
        Load  "glx"
        Load  "dri"
        Load  "dri2"
        Load  "record"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "evdev"
        Option     "xkb_rules"     "evdev"
        Option     "xkb_model"     "pc105"
        Option     "xkb_layout"    "us"
        #Option "SendCoreEvents" "On"
EndSection

Section "InputClass"
        Identifier  "MouseAll"
        Driver      "evdev"
        MatchIsPointer    "On"
        MatchDevicePath   "/dev/input/event*"
        MatchProduct      "Logitech Optical USB Mouse"
EndSection


# This works well but requires AutoAddDevices to be off

Section "InputDevice"
        Identifier "touchscreen0"
        Driver "evdev"
        #Option "CorePointer"
        Option "Device" "/dev/input/touchscreen0"
        Option "DeviceName" "touchscreen0"
        #Option "Emulate3Buttons"
        #Option "Emulate3Timeout" "50"
        Option "SwapAxes" "On"
        Option "InvertX" "On"
        Option "InvertY" "On"
        #Option "Rotate" "CW"
        #Option  "Calibration" "48 757 34 530"
        #Option "Calibrate" "1"
        #Option "SendCoreEvents" "On"
        #Option "ReportingMode" "Raw"
EndSection

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Xenarc"
        ModelName    "Monitor Model"
        #DisplaySize  340        270
        #HorizSync    31.0 - 83.0
        #VertRefresh  56.0 - 76.0
        #Option      "dpms"
EndSection


Section "Device"
        Identifier  "Card0"
        Driver      "radeon"
        VendorName  "ATI Technologies Inc"
        BoardName   "RV280 [Radeon 9200]"
        BusID       "PCI:0:16:0"
        #Option      "UseFBDev"        "true"
        Option      "DRI"             "false"
        Option      "RenderAccel"     "true"
        Option      "AGPFastWrite"    "true"
        #Option      "AGPFastWrite"    "false"
        Option      "EnablePageFlip"  "true"
        Option      "AGPMode"         "4"
EndSection


Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                #Modes    "1024x768" "800x600" "640x480"
        Modes    "800x600"
  EndSubSection
EndSection

#Section "DRI"
#        Mode 0666
#EndSection
</code>
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