$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Add Nvidia Repo on Mint Gnu/Linux Distro

GNU/Linux Mint Adding NVIDIA Graphics Repo Guide

The linked Guides shows you How to Add the NVIDIA PPA Repository for Mint GNU/Linux desktops – Step by step Tutorials.

And this Linux Mint NVIDIA PPA Repo Setup includes most of the NVIDIA Driver.

How to Add Nvidia Repository on Mint GNU/Linux Distro

GNU/Linux Mint NVIDIA Driver Repository Installation Guide