Calibrating standard Xorg driver "ADS7846 Touchscreen"
	current calibration values: min_x=0, max_x=65535 and min_y=0, max_y=65535
	If these values are estimated wrong, either supply it manually with the --precalib option, or run the 'get_precalib.sh' script to automatically get it (through HAL).
	--> Making the calibration permanent <--
  copy the snippet below into '/etc/X11/xorg.conf.d/99-calibration.conf' (/usr/share/X11/xorg.conf.d/ in some distro's)
Section "InputClass"
	Identifier	"calibration"
	MatchProduct	"ADS7846 Touchscreen"
	Option	"MinX"	"21674"
	Option	"MaxX"	"22494"
	Option	"MinY"	"48656"
	Option	"MaxY"	"50158"
	Option	"SwapXY"	"1" # unless it was already set to 1
	Option	"InvertX"	"0"  # unless it was already set
	Option	"InvertY"	"0"  # unless it was already set
EndSection