gistfile1.txt

1) query

$ lshal | grep Elo
  info.vendor = 'Elo TouchSystems'  (string)
  usb_device.vendor = 'Elo TouchSystems'  (string)
  usb.vendor = 'Elo TouchSystems'  (string)
  info.product = 'Elo TouchSystems, Inc. Elo TouchSystems 2700 IntelliTouch(r) USB Touchmonitor Interface'  (string)
  input.product = 'Elo TouchSystems, Inc. Elo TouchSystems 2700 IntelliTouch(r) USB Touchmonitor Interface'  (string)

# sudo lshal | grep -h3 input.device
--
  info.product = 'Elo TouchSystems, Inc. Elo TouchSystems 2700 IntelliTouch(r) USB Touchmonitor Interface'  (string)
  info.subsystem = 'input'  (string)
  info.udi = '/org/freedesktop/Hal/devices/usb_device_4e7_20_20B23159_if0_logicaldev_input'  (string)
  input.device = '/dev/input/event11'  (string)
  input.originating_device = '/org/freedesktop/Hal/devices/usb_device_4e7_20_20B23159_if0'  (string)
  input.product = 'Elo TouchSystems, Inc. Elo TouchSystems 2700 IntelliTouch(r) USB Touchmonitor Interface'  (string)
  input.x11_driver = 'evdev'  (string)


2) configs are:

------------------------------------------------------------- NOT recommended ----
/usr/[lib/share]/X11/xorg.conf.d/: ls
10-evdev.conf   50-fpit.conf       50-vmmouse.conf
10-quirks.conf  50-synaptics.conf  50-wacom.conf

/usr/[lib/share]/X11/xorg.conf.d/: cat 10-evdev.conf

Section "InputClass"
        Identifier "evdev pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

------------------------------------------------------------- YES recommended ----

# cd /etc/X11/xorg.conf.d/; ls
00-system-setup-keyboard.conf

# vim elo.conf
Section "InputDevice"
        Identifier "ELO Touchscreen"
        Driver     "elographics"
        Option     "Device"     "/dev/ttyUSB0"
        Option     "AlwaysCore"
        Option     "screenNo"    "1"
        Option     "MinX" "4100"
        Option     "MaxX" "0"
        Option     "MinY" "0"
        Option     "MaxY" "4100"
        Option     "UntouchDelay" "5"
        Option     "ReportDelay" "1"
EndSection

3) Logout , to restart the X 

4) Now i am in Gnome fallback and same problem exist.