Argos Gnome extension must be installed and enabled

If dropdown menu does not work, install Argos from this fork

1. Clone the repo
2. cd dir_created_by_clone
3. git checkout gnome-3.36
4. cp argos@pew.worldwidemann.com ~/.local/share/gnome-shell/extensions
5. reboot

Instuctions for Ubuntu 20

Copy the_dd_loopback.r.s+.sh to ~/.config/argos