DisplayLink docking station doesn't work on USB 3.0 while working properly on USB 2.0

[Petrus]

Hi,
I am trying to get Toshiba Dynadock U3.0 running under Windows 8.1. It works great connected to USB 2.0, but not with USB 3.0. In this case ethernet, audio and video do not work. The system doesn't see them at all (even as unrecognized devices). The docking station is however found, appears in "devices", but only with usb functions. And there is still this annoying information that it can work faster with USB 3.0 (while it is actually connected to it).

I've tried various drivers, rebooting, clean installations, usb registry cleaning and nothing works. Any idea where to look?

Thanks in advance!