DisplayLink Manager App - System sleep on display-closed mode
The "System sleep on display-closed mode" option is available through the app user interface and applies to MacBook machines only (not to Mac desktops).
Modern MacBooks tend to remain active by default even after closing the lid when any DisplayLink device is connected. With this new option enabled, you can force the machine to enter sleep mode right after closing the lid.
Here are the steps to enable it:
1. Click on the DisplayLink Manager icon located in the menu bar
2. Check the option "System sleep on display-closed mode" in the Settings tab.
3. Close the lid of the Mac.
The machine will enter sleep mode automatically, so all the displays are powered off.
The machine resumes itself when re-opening the lid or when waking it up using an external keyboard or mouse (in this case the machine enters clamshell mode)