* Touchscreen (INPUT_DRIVERS="tslib")

    Calibrate: TSLIB_TSDEVICE=/dev/input/event3 ts_calibrate

    In /usr/share/X11/xorg.conf.d::

        *** COMMENT ENTRIES IN /usr/share/X11/xorg.conf.d/10-evdev.conf relating to Touchscreen ***

        gentoo900 ~ # cat //usr/share/X11/xorg.conf.d/05-tslib.conf
Section "InputClass"
	Identifier "tslib"
	#Identifier "tslib touchscreen catchall"
	MatchIsTouchscreen "on"
	Driver "tslib"
	#MatchDevicePath "/dev/input/event3"
	Option "Device" "/dev/input/event3"

	Option "EmulateRightButton"    "1"
	Option "Calibration" "-2611136 14167 35 33924092 -62 -8962 65536"
EndSection