thanks for the reply.
Already in that driver version (10.18.10.4276)
If I force to switch to second display with Windows+P, the laptop goes black for 10 seconds and then returns to the main screen. Meanwhile LED TV does not detect any input via HDMI (neither extending or duplicating display).
I have read in some forums that Win 10 does not support Dynamic Graphics GPU (only fixed) but this does not make any sense to me.
I have not been able to replicate this issue. I loaded the latest video drivers using Intel® HD Graphics 4000 Windows® 10 latest November update but I am getting multi-monitor without any issues.
You can either wait for future graphics driver releases or Windows updates.
Do you also own a Lenovo?
What is the reference of your notebook? It has also a AMD Radeon 8750M dual graphic board (with Intel HD4000)?
Our demo is Lenovo X230 tablet with HD 4000. Please bear in mind we are testing the Intel® HD Graphics 4000 with Display port to HDMI adapter.
You can either wait for another community member to post similar issues or get customized drivers from Lenovo.