Ubuntu Bionic 18.04.3 LTS for i.MX6/7 boards – August 2019 (kernel 4.14.x) - Boundary Devices
Installed Openbox in POP_OS (A little edited Ubuntu 18.04), didn't get access to the laptop screen, only external monitor, and extremely laggy. Menus coming over desktop by right-click menu also never disappear.
Fix No Sound Through HDMI In External Monitor In Ubuntu Linux
dell - Ubuntu 18.04 Hdmi not detected - Ask Ubuntu
Rockchip RK3566 Ubuntu 20.04 mini PC offers HDMI and VGA video outputs - CNX Software
Amazon.com: i-tec USB 3.0 Dual HDMI Docking Station Windows, Linux, Ubuntu, Android 5, Chrome OS Universal USB Laptop Hub, DisplayLink, Fast Charging Support 2X HDMI, 6X USB, Gigabit Ethernet, Vertical Design :