asahi: switch to fairydust kernel, alien: switch to vanilla kernel

.gitignore

@@ -1,2 +1,3 @@
 system/hosts/peach/firmware/*
 result
+*.qcow2

packages/linux-fairydust/package.nix

@@ -0,0 +1,68 @@
+{
+  lib,
+  callPackage,
+  linuxPackagesFor,
+  _kernelPatches ? [],
+}: let
+  linux-asahi-pkg = {
+    stdenv,
+    lib,
+    fetchFromGitHub,
+    buildLinux,
+    ...
+  }:
+    buildLinux rec {
+      inherit stdenv lib;
+
+      pname = "linux-asahi-fairydust";
+      version = "6.18.2";
+      modDirVersion = version;
+      extraMeta.branch = "6.18";
+
+      src = fetchFromGitHub {
+        owner = "AsahiLinux";
+        repo = "linux";
+        rev = "21a493172ce13c95df12b42faddfca515388d80c";
+        hash = "sha256-UCQs+VYIWZMYiizkLWdPjSipBuOB1ahZx2oy5VuEjPI=";
+      };
+
+      kernelPatches =
+        [
+          {
+            name = "Asahi config";
+            patch = null;
+            structuredExtraConfig = with lib.kernel; {
+              # Needed for GPU
+              ARM64_16K_PAGES = yes;
+
+              ARM64_MEMORY_MODEL_CONTROL = yes;
+              ARM64_ACTLR_STATE = yes;
+
+              # Might lead to the machine rebooting if not loaded soon enough
+              APPLE_WATCHDOG = yes;
+
+              APPLE_MAILBOX = yes;
+
+              APPLE_RTKIT = yes;
+              APPLE_RTKIT_HELPER = yes;
+              RUST_APPLE_RTKIT = yes;
+              RUST_FW_LOADER_ABSTRACTIONS = yes;
+
+              # Can not be built as a module, defaults to no
+              APPLE_M1_CPU_PMU = yes;
+
+              # Defaults to 'y', but we want to allow the user to set options in modprobe.d
+              HID_APPLE = module;
+
+              APPLE_PMGR_MISC = yes;
+              APPLE_PMGR_PWRSTATE = yes;
+            };
+            features.rust = true;
+          }
+        ]
+        ++ _kernelPatches;
+    };
+
+  linux-asahi = callPackage linux-asahi-pkg {};
+in
+  lib.recurseIntoAttrs (linuxPackagesFor linux-asahi)

packages/overlay.nix

@@ -1,3 +1,4 @@
 final: prev: {
   spotify-webapp = prev.callPackage (builtins.path {path = ./spotify/package.nix;}) {};
+  linux-asahi = prev.callPackage (builtins.path {path = ./linux-fairydust/package.nix;}) {};
 }

system/default.nix

@@ -82,11 +82,12 @@
   services = {
     desktopManager.plasma6.enable = true;
     displayManager = {
-      sddm = {
+      # sddm = {
-        enable = true;
+      #   enable = true;
-        wayland.enable = true;
+      #   wayland.enable = true;
-        enableHidpi = true;
+      #   enableHidpi = true;
-      };
+      # };
+      gdm.enable = true;
 
       defaultSession = "niri";
     };

system/hosts/alien/default.nix

@@ -26,10 +26,11 @@
   catppuccin.accent = "blue";
 
   boot.loader.systemd-boot.consoleMode = "max";
-  # boot.kernelPackages = pkgs.linuxPackages;
+  boot.kernelPackages = pkgs.linuxPackages;
 
   # let's use the CachyOS kernel instead!
-  boot.kernelPackages = pkgs.cachyosKernels.linuxPackages-cachyos-lts;
+  # boot.kernelPackages = pkgs.cachyosKernels.linuxPackages-cachyos-lts;
+  # hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;
 
   programs = {
     gamescope = {
@@ -68,7 +69,6 @@
     powerManagement.enable = false;
     nvidiaSettings = false;
     open = false;
-    package = config.boot.kernelPackages.nvidiaPackages.stable;
   };
 
   services.sunshine = {