Jivelite for piCorePlayer on HDMI 10.1'' Touchscreen

[d888sp4]

Hi,
I bought a UPERFECT UPi06-10 Touchscreen LCD display 1900x1200 and connected on pCP 8.2/rpi4b via HDMI.
I set Jivelite with screen resolution of 1920x1080.
ts_calibrate and ts_test are done and work well.

Using the mouse everything works great, but using finger touch doesn't seem to work very well...

Let me explain:
After boot, the mouse cursor appears in the upper left corner after the first finger touch on the display.
For example, if I tap on Applications button item and start moving my finger across the screen, the mouse cursor starts moving from its initial position (top left corner),
following my finger, in the right direction but slower.
So if I click with my finger it actually selects what corresponds to the position of the mouse, which is off-axis (higher than my finger).

The issue is somewhere in Jive...but I am not a linux expert.
Can anyone help me ?

[sodface]

I don't know if it will help, but these are the settings I ended up with on an hdmi screen, though it wasn't 10.1"

https://forums.slimdevices.com/forum/user-forums/linux-unix/108160-jivelite-on-alpine-linux?p=1405929#post1405929

[d888sp4]

I don't know if it will help, but these are the settings I ended up with on an hdmi screen, though it wasn't 10.1"

https://forums.slimdevices.com/forum...29#post1405929

Thanks for your suggestion, but unfortunately it doesn't help me much because among the many considerations of the various posts I find it hard to understand which of these to try in my specific case.
In my installation I haven't created any config.txt nor jivelite.sh yet.
Any more precise indications for a novice like me?
Thanks a lot.