Installing
2. Setting Up NVIDIA Repo
How to Add NVIDIA Graphics and GPU Drivers Ubuntu 21.04 PPA Repo
3. Installing NVIDIA Driver
First, to Check for the Available NVIDIA Driver
Simply run:sudo apt search nvidia-driver*
Finally, to Install the Driver, for Instance do:
sudo apt install nvidia-driver-555 nvidia-settings
And in case of Issue try instead with the more powerful aptitude Package Installer.
So first, to Install Aptitude run:sudo apt install aptitude
And next try the Setup again playing:
sudo aptitude install nvidia-driver-555 nvidia-settings
Last, to Load your barely New Graphics Driver Reboot with:
sudo reboot