Some laptops and other mobile devices may lack a display output or have one that does not support your target resolution and refresh rate like 4K at 60Hz. Same thing if you want to work on two external displays but having only one video output on a device. Since many years now a company named DisplayLink is making chips that create new video display outputs via plain USB (no need for Thunderbolt or USB-C with video pass-through). Let's look at how such dongles work.

› Read more