feat(nvidia-gpu): tweak setup

home.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  isNvidia,
   pkgs,
   secrets,
   ...
@@ -161,6 +162,10 @@ in {
       BROWSER = "brave";
       DEFAULT_BROWSER = "brave";
       DIRENV_LOG_FORMAT = ""; # Disable verbose direnv output showing env variables changed
+      LIBVA_DRIVER_NAME =
+        if isNvidia
+        then "nvidia"
+        else null;
     };
   };
 

machines/flexbox/system.nix

@@ -1,15 +1,7 @@
 # Edit this configuration file to define what should be installed on
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
-{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 {
+{...}: {
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = false; # Disable this after first installation to not wear out EFI storage
@@ -19,9 +11,11 @@ in {
   boot.kernelParams = ["nvme_core.default_ps_max_latency_us=0" "acpiphp.disable=1"];
 
   # GPU
-  environment.systemPackages = [nvidia-offload];
   hardware.nvidia.prime = {
-    offload.enable = true;
+    offload = {
+      enable = true;
+      enableOffloadCmd = true;
+    };
     intelBusId = "PCI:0:2:0";
     nvidiaBusId = "PCI:1:0:0";
   };

system/nvidia/default.nix

@@ -1,7 +1,42 @@
+# See: https://nixos.wiki/wiki/Nvidia
 {pkgs, ...}: {
   boot.blacklistedKernelModules = ["nouveau"];
   environment.systemPackages = [
     pkgs.nvtopPackages.full # nvtop
+    pkgs.mesa-demos
+    pkgs.vulkan-tools
+    pkgs.libva-utils
   ];
   services.xserver.videoDrivers = ["nvidia"];
+  hardware.opengl = {
+    enable = true;
+  };
+
+  hardware.nvidia = {
+    # Modesetting is required.
+    modesetting.enable = true;
+
+    # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
+    # Enable this if you have graphical corruption issues or application crashes after waking
+    # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead
+    # of just the bare essentials.
+    powerManagement.enable = false;
+
+    # Fine-grained power management. Turns off GPU when not in use.
+    # Experimental and only works on modern Nvidia GPUs (Turing or newer).
+    powerManagement.finegrained = true;
+
+    # Use the NVidia open source kernel module (not to be confused with the
+    # independent third-party "nouveau" open source driver).
+    # Support is limited to the Turing and later architectures. Full list of
+    # supported GPUs is at:
+    # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus
+    # Only available from driver 515.43.04+
+    # Currently alpha-quality/buggy, so false is currently the recommended setting.
+    open = false;
+
+    # Enable the Nvidia settings menu,
+    # accessible via `nvidia-settings`.
+    nvidiaSettings = true;
+  };
 }