I have the same issue. Tried today on daily Ubuntu 18.10 build run from live USB. The system boots fine or resumes fine with tb16 sick attached. It also survives disconnecting the dock.
But it does not survive hotplugging the dock - I get a freeze where I can only move the mouse pointer, but the desktop doesn't respond. External monitors are blank and go into powersave mode. Tested on: Ubuntu 18.04 with the official kernel (I don't remember exact version, but it was a week ago I tried it), then also with 4.18.6, 4.18.7 and 4.19.rc3. All kernels, same problem. I have recent Dell Precision 5520 BIOS and fully updated firmware of the TB16 dock (1.0.0). -- 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
