I used to run into this regularly before and just recently ran into it again with the TB16. Previously I had the same issue with a different USB hub without a dock, occurring both on Windows and Linux Dell 5520 and Dell XPS 9560. Without the dock both systems were able to recover. With the dock, only Windows recovers successfully.
I believe this is related to USB bandwidth exhaustion triggering a reset in some edge case. Windows recovers from this after a bit even with the dock, whereas on Linux having it occur with the dock in the chain seems to be preventing recovery. The issue is that with the dock and a daisy-chained USB hub you end up with too much stuff hanging off a single wire or possibly a single controller. It could be about power draw, heat, 5 Gigs of USB3 not being able to fit more than a single 480 Mbit USB2 bus, or that even the 5 Gigs are actually getting saturated. The reset will only occur sporadically when all USB devices happen to be under heavy load at the same instant. Attached the lsusb output from the USB-heavy XPS 9560+TB16 setup that triggers this every 20 minutes when actively using ethernet, audio interfaces, the USB3 NVME SSD and the Android device in an IDE. ** Attachment added: "lsusb.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1766076/+attachment/5427600/+files/lsusb.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766076 Title: USB over thunderbolt turns off every once in a while To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1766076/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
