feat: idols-ai - use intel intel iGPU by default, choose Nvidia dGPU manullay - via prime (#258)

* feat: idols-ai - use intel intel iGPU by default, choose Nvidia dGPU manullay - via prime * fix: niri - update output names for new motherboard * fix: niri - DP-1 with prime offload mode - supports only 120HZ * flake.lock: Update Flake lock file updates: • Updated input 'nixpkgs-master': 'github:nixos/nixpkgs/3879e47ce293fb2932d656aa56551a8e80718533?narHash=sha256-siN4x7y/S0FOdjPC1W0Z/vrX4Rlu%2BVClkEGngmSd0vM%3D' (2026-03-24) → 'github:nixos/nixpkgs/03de9fe87cb2dcec8da9dbaa3ad1c71ea7fef223?narHash=sha256-B7GmxbRADkklyXzV1ahgY4QhCpbQ3crzPCCs2hf6bPM%3D' (2026-04-26) * flake.lock: Update Flake lock file updates: • Updated input 'nixpkgs-stable': 'github:nixos/nixpkgs/e9f278faa1d0c2fc835bd331d4666b59b505a410?narHash=sha256-Jms57zzlFf64ayKzzBWSE2SGvJmK%2BNGt8Gli71d9kmY%3D' (2026-03-14) → 'github:nixos/nixpkgs/a4bf06618f0b5ee50f14ed8f0da77d34ecc19160?narHash=sha256-AIiMJiqvGrN4HyLEbKAoCSRRYn0rnlW5VbKNIMIYqm4%3D' (2026-04-25)
2026-05-12 17:49:44 +02:00 · 2026-04-27 02:33:51 +08:00
parent 4098b0282e
commit 306741c2a7
6 changed files with 82 additions and 33 deletions
--- a/flake.lock
+++ b/flake.lock
@@ -880,11 +880,11 @@
    },
    "nixpkgs-master": {
      "locked": {
-        "lastModified": 1774325747,
-        "narHash": "sha256-siN4x7y/S0FOdjPC1W0Z/vrX4Rlu+VClkEGngmSd0vM=",
+        "lastModified": 1777221542,
+        "narHash": "sha256-B7GmxbRADkklyXzV1ahgY4QhCpbQ3crzPCCs2hf6bPM=",
        "owner": "nixos",
        "repo": "nixpkgs",
-        "rev": "3879e47ce293fb2932d656aa56551a8e80718533",
+        "rev": "03de9fe87cb2dcec8da9dbaa3ad1c71ea7fef223",
        "type": "github"
      },
      "original": {
@@ -912,11 +912,11 @@
    },
    "nixpkgs-stable": {
      "locked": {
-        "lastModified": 1773524153,
-        "narHash": "sha256-Jms57zzlFf64ayKzzBWSE2SGvJmK+NGt8Gli71d9kmY=",
+        "lastModified": 1777077449,
+        "narHash": "sha256-AIiMJiqvGrN4HyLEbKAoCSRRYn0rnlW5VbKNIMIYqm4=",
        "owner": "nixos",
        "repo": "nixpkgs",
-        "rev": "e9f278faa1d0c2fc835bd331d4666b59b505a410",
+        "rev": "a4bf06618f0b5ee50f14ed8f0da77d34ecc19160",
        "type": "github"
      },
      "original": {
--- a/hosts/idols-ai/default.nix
+++ b/hosts/idols-ai/default.nix
@@ -27,11 +27,14 @@ in

    # Include the results of the hardware scan.
    ./hardware-configuration.nix
-    ./nvidia.nix
-    ./ai
+    ./hardware-intel.nix
+    ./hardware-nvidia.nix

    ./preservation.nix
    ./secureboot.nix
+
+    # others
+    ./ai
  ];

  # Zram consumes physical memory for compression, which can cause a deadlock and system hang if the model size approaches the physical memory limit.
--- a/hosts/idols-ai/hardware-configuration.nix
+++ b/hosts/idols-ai/hardware-configuration.nix
@@ -51,10 +51,6 @@
    "usb_storage"
    "sd_mod"
  ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ]; # kvm virtualization support
-  boot.extraModprobeConfig = "options kvm_intel nested=1"; # for intel cpu
-  boot.extraModulePackages = [ ];
  # clear /tmp on boot to get a stateless /tmp directory.
  boot.tmp.cleanOnBoot = true;

--- a/hosts/idols-ai/hardware-intel.nix
+++ b/hosts/idols-ai/hardware-intel.nix
@@ -0,0 +1,48 @@
+{
+  pkgs,
+  modulesPath,
+  ...
+}:
+{
+
+  imports = [
+    (modulesPath + "/hardware/cpu/intel-npu.nix")
+  ];
+
+  # Intel NPU support
+  hardware.cpu.intel.npu.enable = true;
+
+  # kvm virtualization support
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModprobeConfig = "options kvm_intel nested=1";
+  boot.extraModulePackages = [ ];
+
+  # Intel Graphics
+  # https://wiki.nixos.org/wiki/Intel_Graphics
+
+  services.xserver.videoDrivers = [ "modesetting" ];
+
+  hardware.graphics = {
+    enable = true;
+    extraPackages = with pkgs; [
+      # Required for modern Intel GPUs (Xe iGPU and ARC)
+      intel-media-driver # VA-API (iHD) userspace
+      vpl-gpu-rt # oneVPL (QSV) runtime
+
+      # Optional (compute / tooling):
+      intel-compute-runtime # OpenCL (NEO) + Level Zero for Arc/Xe
+    ];
+  };
+
+  environment.sessionVariables = {
+    LIBVA_DRIVER_NAME = "iHD"; # Prefer the modern iHD backend
+  };
+
+  # May help if FFmpeg/VAAPI/QSV init fails (esp. on Arc with i915):
+  hardware.enableRedistributableFirmware = true;
+  boot.kernelParams = [ "i915.enable_guc=3" ];
+
+  # May help services that have trouble accessing /dev/dri (e.g., jellyfin/plex):
+  # users.users.<service>.extraGroups = [ "video" "render" ];
+}
--- a/hosts/idols-ai/hardware-nvidia.nix
+++ b/hosts/idols-ai/hardware-nvidia.nix
@@ -11,12 +11,22 @@
  # https://wiki.hyprland.org/Nvidia/
  # ===============================================================================================

+  # Hybrid graphics with PRIME[integrated GPU (iGPU) + dedicated GPU (dGPU)]
+  hardware.nvidia.prime = {
+    # puts dGPU(Nvidia) to sleep and lets the iGPU handle all tasks by default.
+    offload.enable = true;
+
+    intelBusId = "PCI:0@0:2:0";
+    nvidiaBusId = "PCI:2@0:0:0";
+  };
+
  boot.kernelParams = [
    # Since NVIDIA does not load kernel mode setting by default,
    # enabling it is required to make Wayland compositors function properly.
    "nvidia-drm.fbdev=1"
  ];
  services.xserver.videoDrivers = [ "nvidia" ]; # will install nvidia-vaapi-driver by default
+
  hardware.nvidia = {
    # Open-source kernel modules are preferred over and planned to steadily replace proprietary modules
    open = true;
@@ -43,14 +53,6 @@
    enable32Bit = true;
  };

-  nixpkgs.overlays = [
-    (_: super: {
-      # ffmpeg-full = super.ffmpeg-full.override {
-      #   withNvcodec = true;
-      # };
-    })
-  ];
-
  services.sunshine.settings = {
    max_bitrate = 20000; # in Kbps
    # NVIDIA NVENC Encoder
--- a/hosts/idols-ai/niri-hardware.kdl
+++ b/hosts/idols-ai/niri-hardware.kdl
@@ -1,5 +1,5 @@
 // running `niri msg outputs` to find outputs
-output "DP-2" {
+output "DP-1" {
    // Uncomment this line to disable this output.
    // off

@@ -16,7 +16,7 @@ output "DP-2" {
    // for the resolution.
    // If the mode is omitted altogether or is invalid, niri will pick one automatically.
    // Run `niri msg outputs` while inside a niri instance to list all outputs and their modes.
-    mode "3840x2160@144"
+    mode "3840x2160@120"

    // Position of the output in the global coordinate space.
    // This affects directional monitor actions like "focus-monitor-left", and cursor movement.
@@ -30,7 +30,7 @@ output "DP-2" {
    position x=0 y=0
 }

-output "HDMI-A-1" {
+output "HDMI-A-2" {
    scale 1.5
    transform "normal"
    mode "3840x2160@60"
@@ -38,14 +38,14 @@ output "HDMI-A-1" {
 }

 // ============= Named Workspaces =============
-workspace "2browser" { open-on-output "DP-2"; }
-workspace "4gaming" { open-on-output "DP-2"; }
-workspace "5music" { open-on-output "DP-2"; }
+workspace "2browser" { open-on-output "DP-1"; }
+workspace "4gaming" { open-on-output "DP-1"; }
+workspace "5music" { open-on-output "DP-1"; }

-workspace "1terminal" { open-on-output "HDMI-A-1"; }
-workspace "3chat" { open-on-output "HDMI-A-1"; }
-workspace "6file" { open-on-output "HDMI-A-1"; }
-workspace "7" { open-on-output "HDMI-A-1"; }
-workspace "8" { open-on-output "HDMI-A-1"; }
-workspace "9" { open-on-output "HDMI-A-1"; }
-workspace "0other" { open-on-output "HDMI-A-1"; }
+workspace "1terminal" { open-on-output "HDMI-A-2"; }
+workspace "3chat" { open-on-output "HDMI-A-2"; }
+workspace "6file" { open-on-output "HDMI-A-2"; }
+workspace "7" { open-on-output "HDMI-A-2"; }
+workspace "8" { open-on-output "HDMI-A-2"; }
+workspace "9" { open-on-output "HDMI-A-2"; }
+workspace "0other" { open-on-output "HDMI-A-2"; }