So you got a AOC External USB monitor and it's not working with linux. Easy fix. Go to this site and download the Linux file. It's a run file that comes in as a zip file.
https://www.synaptics.com/products/displaylink-graphics/downloads
Download the file.
Unzip it.
Chmod it u+x
then do a ./filename and run it. Reboot and it will show up.
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