And now, I managed to get a repro of the stated problem: USB controller fails to complete initialization when connecting the thunderbolt cable.
This was 100% reproduceable for a few runs (logs 1 through 5), and only stopped reproducing when I removed an Android device that was sitting at the end of the USB chain - this is log 6 that successfully completed setup. ** Attachment added: "lp1856161-dyndbg-logs-connect-fail.tar.gz" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856161/+attachment/5316692/+files/lp1856161-dyndbg-logs-connect-fail.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856161 Title: Thunderbolt dock fails to connect USB devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856161/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs