After updating to macOS Sierra, Plugable uga-4khdmi is too slow… There is a lot of lag while doing something on the monitor connected to the device. Before it was fine, it was broken by the Sierra update.
Sorry to hear about this issue. Unfortunately this is a known issue. Please see here for more details:
At this time the only known fix would be to roll back to El Capitan until Apple can resolve the regressions in their OS.
Updating the displaylink driver to version 2.6 seems to solve the problem on my setup. It is now usable…
Thanks anyways for the support