multiple monitors - Ubuntu 17.10 secondary display issue, missing menubar, launcher and bar on top of the screen displays date time and network status missing - Ask Ubuntu
How to Fix Monitor Randomly Going Black - Appuals.com
How to set up dual monitors on your desktop PC - Android Authority
How to Use an Android Device as a Second Monitor
Second Monitor Not Detected? We Have the Fixes - Make Tech Easier
PC and Mac with single Mouse and Keyboard Setup on Dual 4k Screens - Rick Strahl's Web Log
dual boot - Unable to properly see grub when external monitor connected - Ask Ubuntu