Looks like it got solved at least for me on recent Ubuntu 18.10 with the official kernel. Looks like now hotplugging Dell TB16 dock works fine on Precision 5520.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1752165 Title: TB16 dock freezes X on hotplug when used with external displays To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1752165/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs