The Wiki and Document pages for Gentoo are horribly outdated and does not work with the new version of xorg server, which has xorg.conf.d. Before I did the following instructions, startx failed. 1. Install Nvidia drivers. For me, it was emerge nvidia-drivers eselect opengl set nvidia 2. https://wiki.archlinux.org/index.php/NVIDIA Arch wiki helps ALOT: running nvidia-config will generate /etc/X11..