dotfiles/nixos/boxes/foureighty/nvidia.nix

{pkgs, ...}: let
  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
    export __NV_PRIME_RENDER_OFFLOAD=1
    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
    export __GLX_VENDOR_LIBRARY_NAME=nvidia
    export __VK_LAYER_NV_optimus=NVIDIA_only
    exec -a "$0" "$@"
  '';
  whichgpu = pkgs.writeShellScriptBin "whichgpu" "glxinfo | grep vendor";
  nvidiaon = pkgs.writeShellScriptBin "nvidiaon" ''
    export __NV_PRIME_RENDER_OFFLOAD=1;
    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0;
    export __GLX_VENDOR_LIBRARY_NAME=nvidia;
    export __VK_LAYER_NV_optimus=NVIDIA_only;
    glxinfo | grep vendor; echo OK!;
  '';
in {
  environment.systemPackages = [nvidia-offload whichgpu nvidiaon];
  hardware.opengl.enable = true;
  hardware.opengl.driSupport32Bit = true;
  hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [libva];
  services.xserver.videoDrivers = ["nvidia"];
  hardware.nvidia.prime = {
    offload.enable = true;
    # Bus ID of the Intel GPU. You can find it using lspci, either under 3D or VGA
    intelBusId = "PCI:0:2:0";
    # Bus ID of the NVIDIA GPU. You can find it using lspci, either under 3D or VGA
    nvidiaBusId = "PCI:1:0:0";
  };
}