Installed the 1:3.28.1-0ubuntu1.18.04.1 on 18.04 Dell XPS 13 9370 machine and tested with Dell dock TB16 BME (Thuderbolt 3 device)
After accepted the authentication, go to settings -> devices, 'Thunderbolt' listed in Devices and Dell Dock listed as "Authorized"
Installed the 1:3.28. 1-0ubuntu1. 18.04.1 on 18.04 Dell XPS 13 9370 machine and tested with Dell dock TB16 BME (Thuderbolt 3 device)
After accepted the authentication, go to settings -> devices, 'Thunderbolt' listed in Devices and Dell Dock listed as "Authorized"