@gudbes, it seems like something went wrong with your install. Could you please "git pull" to update to latest version.
Then run "displaylink-debian" select "uninstall" and after it's done please reboot. After that run the tool again and select "install" and reboot after it's installed.
After successful install systemd should start displaylink.service automatically.
If you still have problems after that please submit an issue on:
https://github.com/AdnanHodzic/displ...debian/issues: