I'm working with a pi 3, I use Jessica img and waveshare driver :
I followed the instructions and the touchscreen 3.5" is working except for touch feature. I tried with other driver like adafruit https://cdn-learn.adafruit.com/downloads/pdf/adafruit-pitft-3-dot-5-touch-screen-for-raspberry-pi.pdf
https://www.elecrow.com/35-inch-480x320-tft-display-with-touch-screen-for-raspberry-pi-p-1385.html but none of them allow the touch feature to be enable.
I was wondering if it was the pi which had a hardware problem since the touch screen was doing perfectely with a pi 2 : display GUI and touch responsive.
In my last attempt I connect the pi with an 7" offical touchscreen
https://www.kubii.fr/ecrans-pitft-raspberry-pi/1131-ecran-tactile-officiel-7-800x480-640522710829.html and it was good.
So now I'm left stupefy and I hav no idea why it's working and not with 3.5 screen. I woul like to heard your thought on my problems thanks.
Hope we can find the reason :)
ps: I have not enought point to put more than 2 link... (T_T)