I do not understand why DisplayLink does not develop a bit more than Mac in order to bring to Ubuntu users a functional device ! Today you must consider Windows, Mac dans Ubuntu as worldwide OS.
I bought a Dell XPS 13 certified by Canonical for Ubuntu OS use. Dell told me when I was ordering there were not any problem of compatibility with your D 3000. It cost me 150 € ! Finally it sleeps in my office waiting for your team to bring a simple linux support....
+1000 for linux support !!!!