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