Can’t get surround sound

[SakenArBiff]

I now have a Toshiba Dynadock U3 instead and I still have the same problem!

I have also tried with a hp laptop with win7 and the same problem.
I get surround sound from the computers then I use the displayport but not from the HDMI port on the USB-dock.

Has anyone for sure been able to get surround sound from the HDMI port using displaylink?

I attach a new log.