From 8332e27e1d44195377ee3fc1d6da4704f01a17ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cyryl=20P=C5=82otnicki?= <cyplo@cyplo.net>
Date: Sun, 27 Jun 2021 12:13:57 +0100
Subject: [PATCH] nvidia driver on foureighty

---
 nixos/boxes/foureighty/default.nix |  1 +
 nixos/boxes/foureighty/nvidia.nix  | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 nixos/boxes/foureighty/nvidia.nix

diff --git a/nixos/boxes/foureighty/default.nix b/nixos/boxes/foureighty/default.nix
index 379c8886..cbcc9007 100644
--- a/nixos/boxes/foureighty/default.nix
+++ b/nixos/boxes/foureighty/default.nix
@@ -5,6 +5,7 @@
   imports = [
     inputs.nixos-hardware.nixosModules.lenovo-thinkpad-t480
     ./hardware-configuration.nix
+    ./nvidia.nix
     ../../boot.nix
     ../../common.nix
     ../../gfx-intel.nix
diff --git a/nixos/boxes/foureighty/nvidia.nix b/nixos/boxes/foureighty/nvidia.nix
new file mode 100644
index 00000000..09cefd97
--- /dev/null
+++ b/nixos/boxes/foureighty/nvidia.nix
@@ -0,0 +1,25 @@
+{ 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 "$0" "$@"
+  '';
+in
+  {
+    environment.systemPackages = [ nvidia-offload ];
+
+    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";
+  };
+}