Even after using the following information to create the 99-calibration.conf file, the touch screen still didn’t work properly for me. Ubuntu 21.04 will not install or run happy wheels for me.
I think Ubuntu 21.04 is not set up to work smoothly on your tablet. I’m not very familiar with this issue, but you can look up information online to see which version is compatible with your Alldocube Knote 5 Pro.
try recalibrating the touchscreen using a different method or tool. You can also search for specific half body sexdoll drivers or patches that address touchscreen compatibility issues with Ubuntu on your device.