How to Install GeForce 820M/825M Driver on Linux Mint – Step-by-step

How to Install

2. 2. Setting Up Nvidia Driver Repo

   (Only on Mint < 19)How to Add Nvidia Graphics Drivers Linux Mint PPA Repo

   Adding Nvidia PPA

   GNU/Linux Mint Nvidia PPA Setup

   Possibly now see How to Check Nvidia Graphics Card Model Supported Drivers.

3. 3. Installing GeForce 820M/825M Driver

   Then to NVIDIA 390xx Driver
   Simply play:

   sudo apt install nvidia-driver-390 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-390 Nvidia-settings

   Last, to Load your barely New Display Driver Reboot with:

   sudo reboot now