Touchscreen on piCore

[MrToga]

Hello guys,

I have a touchscreen on piCore but it seem that the axe x are reverse

How can I calibrate my screen ?

[MrToga]

axis x*

[Paul_123]

Its probably easiest to swap it in the touch driver.  But it depends on what touchscreen you have.

[patrikg]

Is the screen official one ?
You can just edit the config.txt file to swap the screen and the touch.

https://support.thepihut.com/hc/en-us/articles/115002072865-Official-touchscreen-is-upside-down

https://forums.raspberrypi.com/viewtopic.php?t=281149

[MrToga]

Update :

I needed to install xinput and xrandr, after that I used

Code: [Select]

xinput set-prop <deviceid> "Coordinate Transformation Matrix" -1.1 0 1.02 0 1.05 -0.02 0 0 1link here : https://unix.stackexchange.com/questions/685039/x11-how-to-invert-axis-on-touchscreen-matrix
But now I was wondering if I can make this modification persistent on my rasp I found this but don't know what to do (https://askubuntu.com/questions/20298/how-to-make-xinput-settings-persist-after-devices-are-unplugged-replugged-and)

[MrToga]

Update :

After searching I found out that you can put a file in xorg.conf.d/ to handle the touchscreen ( https://askubuntu.com/questions/178140/xinput-coordinate-transformation-matrix-in-xorg-conf)
But after putting the file in xorg.conf.d and startx my touchscreen isn't modified by that file (See attached file).

Any toughts ?

[Juanito]

Assuming you put the snippet in /usr/local/share/X11/xorg.conf.d, do you need MatchIsTouchscreen "on"?

[MrToga]

Hi juanito,

I just put MatchTouchscreen "on" betwenn Identifier and Driver it still doesn't work (I'm putting the snippet in /usr/local/share/X11/xorg.conf.d).
Maybe it's my syntax.
Any toughts ?

[Juanito]

Not MatchTouchscreen, but MatchIsTouchscreen...

[MrToga]

Sorry that's what I wrote in the file but still doesn't work

[Juanito]

So this doesn't work?

Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
   Option   "TransformationMatrix"   "-1.1 0 1.02 0 1.05 -0.02 0 0 1"
EndSection

[MrToga]

Yes doesn't work for me

[Juanito]

Are there any other conf snippets in /usr/local/share/X11/xorg.conf.d that might conflict with this?

[MrToga]

Maybe the 40-libinput.conf but I can't modify this file since it's in /tmp/tcloop/xf86-input-libinput/usr/local/share/X11/xorg.conf.d/
Plus Xorg execute the file with the lowest number first.

[Juanito]

What happens if you rename your snippet 50-screen.conf -> 10-screen.conf?