HD 4000 + NVIDIA Optimus - multi-head stopped working in Windows 10

[ASido2]

I have a laptop with Intel HD 4000 and GF 650M. It has 1x VGA (connected to Intel HD) and 1x HDMI (connected to NVIDIA) and on Windows 8.1 I've been using 2x 1920x1200 displays together with the built-in laptop display (3x in total). After upgrading to Windows 10, I can't use both external displays at the same time. I plug one, HDMI or VGA, and it lights up, but as soon as I plug the second, the first turns off and the second lights up. I noticed that if I have HDMI display plugged in only, NVIDIA Control Panel contains 3 sections - 3D Settings, Display, Video. As soon as I plug VGA display, Display and Video sections disappear and NVIDIA widget shows that the card is turned off. I am using Intel 10.18.10.4252 and NVIDIA 353.62 drivers. I have a friend who has a laptop with similar configuration: HD 4600 + GF 760M. We use the same NVIDIA driver versions, but his HD 4600 drivers are 4256, and for him both screens light up perfectly fine and both graphic adapters are working together.

My Dxdiag.txt is attached.

[Kevin_M_Intel]

Hello Asido,

Based on the system information you have provided, your computer is a switchable or Hybrid graphics system. This means it can use two graphics controllers at the same time for different tasks.

It is important to say that the driver your computer uses is different than the one we provide. You can try our driver but since your computer uses a very special configuration it is necessary to get the driver directly from your Computer Manufacture (ASUS).

Here you have the link for your laptop:

https://www.asus.com/Notebooks/N76VZ/overview/ https://www.asus.com/Notebooks/N76VZ/overview/

Kevin M

[ASido2]

The Intel HD driver from ASUS is for Windows 8.1 upgrade only, which doesn't install on Windows 10 (doesn't meet minimum system requirements prompt).

I've been using the latest GeForce drivers from nvidia.com - bumping each version from within GeForce Experience tool during the last 2 years and never faced this problem before. I tried to use older NVIDIA drivers, but no difference. I also tried to install older Intel HD drivers, but no difference either.