revert to pure sddm & peach: add ddc support

home/hosts/alien/default.nix

@@ -18,12 +18,6 @@
     pkgs.daggerfall-unity
   ];
 
-  programs.noctalia-shell.settings.brightness = {
-    brightnessStep = 5;
-    enforceMinimum = false;
-    enableDdcSupport = true;
-  };
-
   programs.spicetify = let
     spicePkgs = spicetify-nix.legacyPackages.${pkgs.stdenv.hostPlatform.system};
   in {

home/hosts/peach/default.nix

@@ -18,12 +18,6 @@
     render-drm-device = "/dev/dri/card2";
   };
 
-  programs.noctalia-shell.settings.brightness = {
-    brightnessStep = 5;
-    enforceMinimum = false;
-    enableDdcSupport = false;
-  };
-
   programs.plasma = {
     input.touchpads = [
       {

home/tiling/niri/noctalia.nix

@@ -86,6 +86,11 @@ in {
     package = customPackage;
     settings = {
       settingsVersion = 0;
+      brightness = {
+        brightnessStep = 5;
+        enforceMinimum = false;
+        enableDdcSupport = true;
+      };
       bar = {
         position = "top";
         backgroundOpacity = 1;

system/default.nix

@@ -81,11 +81,11 @@
   services = {
     desktopManager.plasma6.enable = true;
     displayManager = {
-      # sddm = {
-      #   enable = true;
-      #   wayland.enable = true;
-      #   enableHidpi = true;
-      # };
+      sddm = {
+        enable = true;
+        wayland.enable = true;
+        enableHidpi = true;
+      };
       defaultSession = "niri";
     };
 

system/hosts/alien/default.nix

@@ -55,11 +55,6 @@
       enable = false;
       user = "sckova";
     };
-    sddm = {
-      enable = true;
-      wayland.enable = true;
-      enableHidpi = true;
-    };
   };
 
   environment = {

system/hosts/peach/default.nix

@@ -1,4 +1,8 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  config,
+  ...
+}: {
   boot.kernelParams = ["appledrm.show_notch=1"];
 
   catppuccin = {
@@ -6,7 +10,19 @@
     flavor = "macchiato";
   };
 
-  services.displayManager.gdm.enable = true;
+  environment.systemPackages = with pkgs; [
+    ddcutil
+  ];
+
+  boot.extraModulePackages = [config.boot.kernelPackages.ddcci-driver];
+  boot.kernelModules = [
+    "i2c-dev"
+    "ddcci_backlight"
+  ];
+  services.udev.extraRules = ''
+    KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"
+  '';
+  hardware.i2c.enable = true;
 
   hardware.asahi = {
     enable = true;