Hi Jochen,
The graphics driver you use does NOT support cloning across graphics adapters. Your driver is Mobile Intel(R) 4 Series Express Chipset Family (Microsoft Corporation - WDDM 1.1) (Intel Corporation)
The feature called DWM Clone was introduced as optional in WDDM 1.3 and later became compulsory.
Intel would need to release Windows 10 drivers and they won't on such an old card. Your graphics driver predates, by more than 3 years, the operating system you are using.
With previous versions, we could create this feature from nothing...
Your solution is to remove the outdated driver to use the inbox Microsoft Basic Graphics Adapter which, despite its unengaging name, will support the cloning across graphics adpaters so from the Intel to the DisplayLink adapter.
http://support.displaylink.com/knowl...indows-10-anni
Kind regards,
Alban