Rotate the screen and Touchscreen about chilipie-kiosk HOT 4 CLOSED

I had some trouble with this today (am bad in linux, but I get by). I was delighted to find my Viewsonic TD2421 worked perfectly, touch screen and all, right out of the box on Chilipie 2.1.0. What a great repo for those looking for a lean web kiosk with no BS! So awesome.

Setting display_rotate=3 in /boot/config.txt worked great for the display, but (as expected) the touch screen input was now incorrect.

DISPLAY=:0 xinput_calibrator had no effect (even after finding out I had to install it) not sure why. It would take time to run and finish, but it never asked me for any inputs or anything.

There were some xinput set-prop solutions out there that were more involved, none of which I managed to get working.

Using Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1" in my /usr/share/X11/xorg.conf/40-libinput.conf was close but the display went all whacky. The lower half of the screen stopped working (though the pointer could be seen on it), the width seemed to revert to normal wide-screen after any inputs were received from the screen or keyboard, spilling off of the viewable area of the monitor, and my Pi3 started to overheat! I tried lots of combinations of these and even found an awesome tool to help visualize the transformations, but I never made it home.

What ultimately worked for me was a combination of installing the evdev driver (whatever that is) with:
sudo apt-get install xserver-xorg-input-evdev

Then hacking up my /usr/share/X11/xorg.conf/40-libinput.conf and changing the Driver "libinput" to Driver "evdev" as done in this thread, allowing use of the SwapAxes and InvertX and InvertY options like outlined here. My resulting section looked as:

Section "InputClass"
Identifier "libinput touchscreen catchall"
MatchIsTouchscreen "on"
MatchDevicePath "/dev/input/event*"
Option "SwapAxes" "1"
Option "InvertX" "true"
Option "InvertY" "true" (if you have display_rotate=1 I think)
Driver "evdev"
EndSection

Is probably totally backwards way of doing it, but it worked for my screen great. There's still the problem where as soon you you hit a key on a keyboard the aspect ratio changes to be wider and shorter than was was being displayed, but since we won't be using a keyboard on the thing, we can manage.

from chilipie-kiosk.

If this is a cheap Chinese screen, you'll need to install the drivers for your screen and then edit boot/config.txt to add display_rotate=1 as per the instructions in first-boot.md. Check under /usr/share/X11/xorg.conf.d/ for a libinput conf file. You can add

Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"

in the touchscreen catchall section. Check out the PDF manual for this screen for the general idea - https://www.waveshare.com/wiki/5inch_HDMI_LCD_(H)

from chilipie-kiosk.

Great pointers, thank you @GendoRokubungi!

@Fyb3roptik, did that help you get it sorted out?

from chilipie-kiosk.

Thanks @lbillett

It work for RPi3.

/boot/config.txt :

#dtoverlay=vc4-fkms-v3d
dsplay_rotate=3

/usr/share/X11/xorg.conf/40-libinput.conf :

Section "InputClass"
  Identifier "libinput touchscreen catchall"
  MatchIsTouchscreen "on"
  MatchDevicePath "/dev/input/event*"
  Option "SwapAxes" "1"
  Option "InvertX" "true"
  Driver "evdev"
EndSection

from chilipie-kiosk.