Ok I couldn't stand it any more so I installed the Intel USB drivers following the instructions on Plugable. Note the driver version has been updated several times since they published their notes.
Anyway, so far so good ethernet performance seems normal again, and BONUS: no more mouse lag.
Backup to NAS seems to be working normally.
Now that I've done this, I'm not sure what I will do when new drivers are released by DisplayLink...
but for now, I'm happy.
Using Lenovo X1 Carbon and USB 3.0 Dock.
EDIT: Sorry, I guess I was wrong. Seemed like it was working better for a while as the backup seemed to be running, but it crapped out again. Large files across Ethernet just don't work. Also noticed occasional mouse lag/freeze but this still seems better than before.
Last edited by Paulie; 04-30-2013 at 02:02 AM.
Reason: new info
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