Hardware incompatibility with Ubuntu 18.04

The How to Install Nvidia Quadro 4000 Ubuntu 18.04 Driver tutorial that you linked to in your comment is already not up-to-date for Ubuntu 18.04, so I think it can be improved a little bit. The nvidia-driver-465 package has already been added to the default Ubuntu 18.04 repositories. To install this driver package in Ubuntu 18.04 open the terminal and type:

sudo apt update
sudo apt install nvidia-driver-465 nvidia-settings
sudo reboot

In Ubuntu 20.04 and later, run these commands instead.

sudo apt update
sudo ubuntu-drivers autoinstall 
sudo reboot

The autoinstall command of ubuntu-drivers installs drivers that are appropriate for automatic installation including their dependencies.