feat: Enable proper suspend support for Dell laptops

boot.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, ... }:
+{ ... }:
 
 {
   
@@ -15,13 +15,7 @@
     # Enable "Silent boot"
     consoleLogLevel = 3;
     initrd.verbose = false;
-    kernelParams = [
-      "quiet"
-      "splash"
-      "boot.shell_on_fail"
-      "udev.log_priority=3"
-      "rd.systemd.show_status=auto"
-    ];
+
     # Hide the OS choice for bootloaders.
     # It's still possible to open the bootloader list by pressing any key
     # It will just not appear on screen unless a key is pressed
@@ -46,5 +40,10 @@
     LC_TIME = "en_US.UTF-8";
   };
 
+  systemd.sleep.extraConfig = ''
+    SuspendState=freeze
+    HibernateDelaySec=2h
+  '';
+
   system.stateVersion = "25.11"; # Did you read the comment?
 }

flake.nix

@@ -1,4 +1,3 @@
-# /etc/nixos/flake.nix
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
@@ -6,17 +5,13 @@
       url = "github:nix-community/home-manager/release-25.11";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    nixos-generators = {
-      url = "github:nix-community/nixos-generators";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
     disko = {
       url = "github:nix-community/disko";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     lazyvim-nixvim.url = "github:azuwis/lazyvim-nixvim";
   };
-  outputs = inputs@{ self, nixpkgs, home-manager, disko, nixos-generators, lazyvim-nixvim, ... }: {
+  outputs = inputs@{ self, nixpkgs, home-manager, disko, lazyvim-nixvim, ... }: {
     nixosConfigurations = import ./hosts { inherit inputs; };
   };
 }

hosts/nix-laptop1.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, modulesPath, ... }:
+{ config, lib, modulesPath, ... }:
 
 {
   imports =
@@ -9,6 +9,16 @@
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
+  boot.kernelParams = [
+      "quiet"
+      "splash"
+      "boot.shell_on_fail"
+      "udev.log_priority=3"
+      "rd.systemd.show_status=auto"
+      "i915.enable_psr=0"
+      "i915.enable_dc=0"
+      "i915.enable_fbc=0"
+    ];
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;

net.nix

@@ -1,8 +1,4 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, ... }:
+{ ... }:
 
 {
   # Enable networking

sw.nix

@@ -1,8 +1,4 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, inputs, ... }:
+{ pkgs, inputs, ... }:
 
 {
   # Enable the KDE Plasma Desktop Environment.

users/default.nix

@@ -1,8 +1,4 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, ... }:
+{ pkgs, ... }:
 
 {
   # Define a user account. Don't forget to set a password with ‘passwd’.

users/engr-ugaif.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, lib, ... }:
+{ pkgs, ... }:
 let
   # Fetch upstream OMP theme once
   jyumppTheme = pkgs.fetchurl {

users/hdh20267.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, lib, ... }:
+{ pkgs, ... }:
 let
   # Fetch upstream OMP theme once
   jyumppTheme = pkgs.fetchurl {

users/root.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, lib, ... }:
+{ pkgs, ... }:
 
 let
   # Fetch upstream OMP theme once