Bought a laptop a couple of weeks ago (Asus n53sv). Running Windows 7. Im playing normally, and the gamma will go dark all of a sudden, randomly (like every minute or two?). What I have to do is, for example, if im playing at 1.2, then I have to change it to 1.21 (or any other value) and go back to 1.2.

It also happens every time I go to window mode then fullscreen again. Also happens with ezQuake, and not sure if it happened with QL.

I've forced the power saving options to be off, i've forced to always use the nvidia card and not the integrated graphics, i've enable/disabled options on the nvidia control panel like power saving, CUDA, multiple monitors support, vertical sync, and all that. It keeps happening. It's really frustrating.

I updated the nvidia graphics.

What can I do?