Upgrade the TBT NVM to 28.0. I can observe the same symptom on *some* USB Type-C devices get plugged to TBT port. Plug the same device to the non-TBT port, it works correctly.
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Kai-Heng Feng (kaihengfeng) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745747 Title: No USB support for Dell XPS 13 9370 running Bionic 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1745747/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs