Step-by-step – Driver Nvidia Installation in Debian Bullseye

Installing Apt Driver

2. 2. Checking NVIDIA Driver

   Search for NVIDIA GNU/Linux Drivers

   NVIDIA Linux Driver Searching

   Looking up NVIDIA GNU/Linux Drivers

   Take a look at the Drivers Supporting your Device.
   And when in doubt then see also How to Check NVIDIA Graphics Card Model Supported Drivers.

3. 3. Enabling Non-free Repo

   How to Add Debian Non Free Repo Preserving System

   contrib & non-free Repos Setup Guide

   Link to Step by step Debian Non Free Repository Setup Guide.

4. 4. Installing NVIDIA Driver from Debian Repo

   First, try to Check Available NVIDIA Driver Version
   With:

   sudo apt search nvidia-driver

   And then if it is in the Supported Drivers Range to setup it play:

   sudo apt install nvidia-driver nvidia-settings

   And you are done!
   To load it Reboot with:

   sudo reboot

   Else Download the NVIDIA Driver installer and follow with the Next Step…