Manfred :
I ran cat /proc/bus/input/devices and my touch screen is input2.
So I edited the ew_bsp_touch.c file as suggested.
Then recompiled with make.
But when I ran the program I got the error message
Initialize Display ... [failed]
So I though openGL is not selected somehow ( it was before ???)
so I used raspi-config to select openGl and when I did some commands ran, I assume installing something. and I selected the fake KMS version
But I still get the [failed] message when I run the EmbeddedWizard-RasPi-4B file.
The only thing I did between after running the program with good video but no touch, and now, was to power down, send my previous message, read your reply, and then power back up.
Any ideas why openGL doesnt seem to be starting ?
thanks