First commit

system-master/configuration/desktop/audio.nix

@@ -0,0 +1,70 @@
+{ config, pkgs, lib, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    pipewire
+    wireplumber
+    alsa-utils
+    pulseaudio
+    pamixer
+    pavucontrol
+  ];
+
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    jack.enable = true;
+    wireplumber.enable = true;
+  };
+
+  security.rtkit.enable = true;
+
+  # Helps on many laptops (Intel SOF etc.)
+  hardware.enableRedistributableFirmware = true;
+
+  # Prefer analog over HDMI/DP in a machine-agnostic way
+  services.pipewire.wireplumber.extraConfig."51-audio-priorities" = {
+    "monitor.alsa.rules" = [
+      # De-prioritize HDMI / DisplayPort sinks
+      {
+        matches = [
+          { "node.name" = "~alsa_output\\..*HDMI.*"; }
+          { "node.name" = "~alsa_output\\..*DisplayPort.*"; }
+        ];
+        actions.update-props = {
+          "priority.session" = 100;
+          "priority.driver" = 100;
+        };
+      }
+
+      # Prefer analog sinks (speakers/headphones)
+      {
+        matches = [
+          { "node.name" = "~alsa_output\\..*analog.*"; }
+          { "node.name" = "~alsa_output\\..*Headphones.*"; }
+          { "node.name" = "~alsa_output\\..*Speaker.*"; }
+        ];
+        actions.update-props = {
+          "priority.session" = 2000;
+          "priority.driver" = 2000;
+        };
+      }
+    ];
+  };
+
+  # Optional: clear "sticky" user-selected defaults so priority rules win
+  systemd.user.services.wireplumber-clear-default-nodes = {
+    description = "Clear WirePlumber saved default nodes (avoid HDMI becoming sticky)";
+
+    after = [ "wireplumber.service" ];
+    partOf = [ "wireplumber.service" ];
+    wantedBy = [ "default.target" ];
+
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.coreutils}/bin/rm -f %h/.local/state/wireplumber/default-nodes";
+    };
+  };
+}