I'm guessing all your problems started because you created an xorg.conf file. That xorg.conf file then broke the Xorg config file that come with the "nvidia-utils" package. That config file is installed here:
I'm guessing all your problems started because you created an xorg.conf file. That xorg.conf file then broke the Xorg config file that come with the "nvidia-utils" package. That config file is installed here: