Install Nvidia GPU Driver

https://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linuxhttps://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linux"Automatic Install Nvidia drivers on Ubuntu 20.04 using PPA repository" mentioned in the above atricle work properly on my machine.::