Hi to everyone i will leave my feedback on unsupported 340 nvidia driver (mx310 in my case).
After normal setup Zorin x64 Core (with connected internet - updated repo) on boot i just see the mouse pointer in black screen as reported from many user on web.
I followed this step:
and Install Nvidia Drivers on Ubuntu 20.04 {3 Methods}
But it was no working...
After some search i found there is not good compatibility of nvida 340 and kernel 5.11...
i solved my problem by install 5.4 kernel by following this step:
sudo apt purge nvidia*
sudo apt install --install-recommends linux-generic
Reboot, and select kernel 5.4 at grub menu.
sudo apt remove --purge linux-generic-hwe-20.04 linux-hwe-* linux-modules-5.11* linux-modules-extra-5.11*
sudo ubuntu-drivers autoinstall
Solved!