I have an Asus laptop (GL742VW) since three years and I had Windows installed for two. All games worked on my dedicated graphic card without problems.
But now that I use Linux everyday, I would like to play. I tried without doing anything, the games turn on my graphic chipset (Intel HD Graphic 5000). I checked and nouveau doesn't support my GTX960M (Here it's supported but here it's written TODO) so I installed the nvidia drivers. Since that none of my games using OpenGL wants to open (they display the "OpenGL GLX extension not supported" error message).
I tried to install bumblebee but then the xserver crashed at startup. I've found out that adding acpi_osi=! acpi_osi="Windows 2009" to the GRUB_CMDLINE_LINUX_DEFAULT line in the grub config solved the crash. But then we returns to the error message above. I tried a lot of things and none of them worked. How can I make it work ?