Toshiba Dynadock U3 Screen Laggy and Poor Network Performance

[TimTom]

Hi,
I'm experiencing the same problems on a Dell XPS-12 (Win8/64, built in Intel HD-4000 graphics card).
Screen will kind of freeze for 0.5-1s in normal office operation.
Updating to SW 7.2M1 didn't help.

When I connect the screen (LG 1600x1200 via DVI) directly to the laptop's Mini-Displayport the lagging will disappear.

You mentioned a SW-version that helped. Where can this be found?

Thanks for any advice.
TimTom