I already tried almost everything available on the internet and not consiguir make the video card to work properly. I do not care if only one (any of them) work, I turn to another and be all right. Not open screen preferences, screen blinking, or become dark (have to point flashlight on the screen to see the OS).
My notebook is Asus S46CB, I7 3ºG, 16gb RAM, 240GB SSD, Intela HD4000 integrated video and GT-740 dedicated video. Specifications: https://www.asus.com/br/Notebooks/S46CB/specifications/
Screen prints of hardware configurations and clover that I do: