Ah.. I have reviewed my suggestion and discovered copy-paste mistake. It's now corrected. After modifying displaylink-installer.sh script should be run instead of the original .run file.
The intention of the patching the install script is to force it to create systemd daemon service. The install should print as one of the last output:
Code:
Starting DLM systemd service
And you should see /usr/lib/displaylink/DisplayLinkManager among running processes, which you can look up using e.g. htop.