Install NVIDIA 820M Driver - Ubuntu 20.04

Im’ trying to install NVIDIA 820M, but Ubuntu only accepts the alternative driver

If I try to install the proprietary, I receive a black screen and have to purge the driver to get the GUI back

I’ve tried the NVIDIA-Linux-x86_64-430.40.run provided on NVIDIA webstie, but it recommends to install via Ubuntu interface

Some safe way to install this driver?

The 820m is likely Fermi-based, so try the 390 driver. Please run nvidia-bug-report.sh as root and attach the resulting nvidia-bug-report.log.gz file to your post.