Hi, I had the same issue when I built my mirror… Here is how I solved it. Made a .sh script with all the information: :)
#!/bin/bash
# Before I just tested with the xinput command directly in the autostart file, but that did not work. So now instead I just created a script called xin.sh.
# nano ~/xin.sh
# Then added
# DISPLAY=:0.0 xinput --set-prop "Multi touch Multi touch overlay device" "Coordinate Transformation Matrix" 0 1 0 -1 0 1 0 0 1
# There should actually be 3 spaces between “Multi touch” and “Multi touch overlay device”. For some reason the board removes the extra spaces here.
#
# You can actually find the “name” of the device with this command form a console: DISPLAY=:0.0 xinput list
# Shows something like this:
#
# Virtual core pointer id=2 [master pointer (3)]
# Virtual core XTEST pointer id=4 [slave pointer (2)]
# Multi touch Multi touch overlay device id=6 [slave pointer (2)]
# Virtual core keyboard id=3 [master keyboard (2)]
# Virtual core XTEST keyboard id=5 [slave keyboard (3)]
#
# Depending on what you have connected to your RPi. 🙂
#
# So, after creating the xin.sh I added that to the autostart file for LXDE:
# Like this:
# nano ~/.config/lxsession/LXDE-pi/autostart
# Added at the end of the file.
# @/home/pi/xin.sh
# Restarted and it works.
#
DISPLAY=:0.0 xinput --set-prop "Multi touch Multi touch overlay device" "Coordinate Transformation Matrix" 0 1 0 -1 0 1 0 0 1
Maybe you guys can use it some how? :)
