A colleague with the same laptop told me that Windows does not
experience any wired dock network dropouts.

To rule out any hardware being possibly faulty - I ran continuous
network file transfers on Windows 10 for 24 hours and did not see any
diminished performance, let alone any outright network failure.

Installing Ubuntu 16.04.2 again (with 4.8) and testing that as well as
with 4.10 makes the problem reproducible:

- xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current 
TD ep_index 2 comp_code 13
- xhci_hcd 0000:0e:00.0: Looking for event-dma [16-digit-integer] trb-start 
[16-digit-hexadecimal] trb-end [16-digit-hexadecimal] seg-start 
[16-digit-hexadecimal] seg-end [16-digit-hexadecimal]

This, along with other users running into the same issue, points to the
issue being _clearly_ software related unless I've missed something in
my diagnosis.

What other data can I provide? I wish I could be of more help, but am
not competent enough to know where to even begin to write a patch.

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https://bugs.launchpad.net/bugs/1663975

Title:
  XHCI errors causes dock USB and network adapter dropouts

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