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

How to Install Realtek WiFi Driver on Gnu/Linux Mint Distro

GNU/Linux Mint Installing Realtek Wi-fi Driver Setup Guide

The linked tutorials show you step-by-step How to Install Realtek Wireless Card Driver on Mint GNU/Linux – Step by step Tutorial.

And this Realtek WiFi Driver Mint Setup cover most of the available Models.

Most noteworthy: some Driver like rtl8187B, rtl8187L, rtl8188EE, rtl8188SU, rtl8191SU, rtl8192CE, rtl8192CU, rtl8192DE, rtl8192EE, rtl8192SE, rtl8192SU, rtl8723AE, rtl8723BE, and rtl8821AE, should be already provided by the Linux Kernel!

How to Install Realtek WiFi Driver on Mint - Featured

GNU/Linux Mint Realtek Wireless Driver Installation Guide