After having the same issue myself by using a mainline 5.13 kernel in Pop OS, I managed to get the monitors working by having a look at the guide for porting the driver to other distros here: https://support.displaylink.com/knowledgebase/articles/679060-porting-the-displaylink-ubuntu-driver-to-other-lin
A small summary though (only tested in PopOs, but should probably work in most Debian/Ubuntu based distros):
- Make sure you uninstall the current EVDI driver. Do this by calling the currently installed DisplayLink installer file with a "uninstall" argument. For example:
sudo ./displaylink-driver-5.4.0-55.153.run uninstall
- Download the latest Ubuntu driver from here
- Extract the content of the installer file. For example:
./displaylink-driver-5.4.1-55.174.run --noexec --keep
- A folder will now exist in the same path as your installer file. CD into it like so: (replace x.x.xx with the real numbers) `cd ./displaylink-