White screen not responding with GeForce 940 MX + Intel HD Graphics 620 (Integrated)

Hi guys,

I have a Dell Inspiron 14 7000 (7460) Series Laptop with Intel HD Graphics 620 (Integrated) + GeForce 940 MX, and I'm developing a QT GPU/OpenGL application, but I cannot run my software in GeForce 940 MX because it is freezing. I receive a white screen and not responding message. The freezing occurs with Automatic Driver Selection and Forced mode. I'm lost and don't know where to find a solution.

What can I do? What is happening? Could someone help me?