Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct
Qt 5.10.1 EGLFS libinput Touchscreen rotation
I try to do my first development on Rapsberri PI 3 and Qt.
I use Qt 5.10.1 with cross compilation for Raspberry 3
I have a 7" LCD with USB touchscreen rotate a 90°.
I found the solution to rotate the screen with config.txt adding :
and the touchscreen is rotated with adding call a batch script in
the script is :
xinput set-prop 'FocalTech Lab FTxxxx MultiTouch' 'Coordinate Transformation Matrix' 0 -1 1 1 0 0 0 0 1
So the touchscreen is working in startx
My problem is with programs in Qt using EGLFS and libinput. I can not rotate my touchscreen.
I read a lot a post talking about wayland, tslib, ts_calibrate, evdev.... But I think it is for old development.
I am pretty sure there is a simple solution for nowadays.
Can someone help me about this issue.
3 month I turn around and do not understand why I cannot rotate touch screen only with Qt application.
Diracsbracket last edited by
Since you have a multitouch panel it seems, you can use the
/dev/input/eventXwith the correct value for
Xif you haven't setup a
The same with rotation:
3 months to turn around, and with 3 lines, you solve my problem !
Now I would like to understand a little why I cannot use libinput as it is the native driver for ELGFS.
This are no solution with libinput ?
I trough evdev was an old solution
Well, evdevtouch plugin seem to be completely buggy.
The rotation woks very well but afin 1 to 10 secondes, the touch does not woks anymore.
Even with example programs.
I have this information :
TouchPointPressed without previous release event QQuickEventPoint(accepted:false state:Pressed scenePos:QPointF(249.631,798.957) id:2000002 timeHeld:0)
I have to reset the application to work.
Is there any solution to workaround this bug or a solution with libinput ?