X-server configuration

    Nvidia to Nouveau, porting the video driver from
        files, affected
            : see /etc/modprobe.d/ : namely `nvidia.conf`
                : e.g. /etc/modprobe.d/._/nvidia.conf
            : see /etc/portage/make.conf : namely `VIDEO_CARDS`
            : see /etc/portage/package.accept_keywords
            : see /etc/X11/xorg.conf.d/
                : e.g. /etc/X11/Nvidia.conf.d/
                : e.g. /etc/X11/Nouveau.conf.d/
            : see /usr/src/linux/.config
                : see /usr/src/linux/.config.brec
                : e.g. _/config.brec_diff_Nvidia_to_Nouveau
            : see /var/lib/portage/world :
                  namely `sys-firmware/nvidia-firmware` over `x11-drivers/nvidia-drivers`
                : see /var/lib/portage/world.brec
            : private