From 96a0745a6d2b6eebd986a3a794569263c41d8b15 Mon Sep 17 00:00:00 2001
From: Sean Kovacs <kovacsmillio@gmail.com>
Date: Fri, 16 Jan 2026 11:03:50 -0500
Subject: [PATCH] revert to pure sddm & peach: add ddc support

---
 home/hosts/alien/default.nix   |  6 ------
 home/hosts/peach/default.nix   |  6 ------
 home/tiling/niri/noctalia.nix  |  5 +++++
 system/default.nix             | 10 +++++-----
 system/hosts/alien/default.nix |  5 -----
 system/hosts/peach/default.nix | 20 ++++++++++++++++++--
 6 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/home/hosts/alien/default.nix b/home/hosts/alien/default.nix
index 3b78219..310972a 100644
--- a/home/hosts/alien/default.nix
+++ b/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 {
diff --git a/home/hosts/peach/default.nix b/home/hosts/peach/default.nix
index ded2bd7..71560a5 100644
--- a/home/hosts/peach/default.nix
+++ b/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 = [
       {
diff --git a/home/tiling/niri/noctalia.nix b/home/tiling/niri/noctalia.nix
index ee59765..4bc249f 100644
--- a/home/tiling/niri/noctalia.nix
+++ b/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;
diff --git a/system/default.nix b/system/default.nix
index ee04498..b73ec82 100755
--- a/system/default.nix
+++ b/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";
     };
 
diff --git a/system/hosts/alien/default.nix b/system/hosts/alien/default.nix
index 71472e2..2f27f25 100644
--- a/system/hosts/alien/default.nix
+++ b/system/hosts/alien/default.nix
@@ -55,11 +55,6 @@
       enable = false;
       user = "sckova";
     };
-    sddm = {
-      enable = true;
-      wayland.enable = true;
-      enableHidpi = true;
-    };
   };
 
   environment = {
diff --git a/system/hosts/peach/default.nix b/system/hosts/peach/default.nix
index eb127f2..c3fa403 100644
--- a/system/hosts/peach/default.nix
+++ b/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;