Jetson Nano & Waveshare Touch Screen not working

[steven.sparks]

I’m on Jetpack 4.6 Jetson Nano. In reading other posts from a year ago touch screen access was having issues. Has the software progressed? I have a Waveshare 400x1280 touch screen and can’t get touch to work. If it doesn’t work I will need to move onto another model (suggest?) or another manufacturer (hate to do). Any ideas, help, point me in a good direction?

I have /usr/share/X11/xorg.conf.d/40-libinput.conf set to

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

[steven.sparks]

I had the USB plugged into the wrong spot. It now responds to touch. However, the locations of the touch responses are off. I flipped the screen 90 to have landscape and I think the touch is not translating the location correctly. Anyone have an idea? I have a support request into Waveshare.

[DaneLLL]

Hi,
Please contact the vendor to get support. Or other users may have the device and can share experience.

[steven.sparks]

One needs to rotate the touch orientation to match the physical orientation.

1. Create xorg.conf.d directory in /etc/X11, and copy 40-libinput.conf from /usr/share/X11/xorg.conf.d to new directory
   root@DEVELOPMENT-JETSON:/etc/X11# mkdir xorg.conf.d
   root@DEVELOPMENT-JETSON:/etc/X11# sudo cp /usr/share/X11/xorg.conf.d/40-libinput.conf /etc/X11/xorg.conf.d/40-libinput.conf

2. Modify 40-libinput.conf and add the Calibration Matrix option
   Section InputClass
   Identifier “libinput touchscreen catchall”
   MatchIsTouchscreen “on”
   Option “CalibrationMatrix” “0 1 0 -1 0 1 0 0 1”
   MatchDevicePath “/dev/input/event*”
   Driver “libinput”
   EndSection

Note:
90 degree rotation: Option “CalibrationMatrix” “0 1 0 -1 0 1 0 0 1”
180 degree rotation: Option “CalibrationMatrix” “-1 0 1 0 -1 1 0 0 1”
270 degree rotation: Option “CalibrationMatrix” “0 -1 1 1 0 0 0 0 1”