further intel cpu/gpu config

hosts/seraphim/default.nix

@@ -1,7 +1,3 @@
-# Edit this configuration file to define what should be installed on
-# your system. Help is available in the configuration.nix(5) man page, on
-# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
-
 { config, inputs, lib, pkgs, ... }:
 
 {
@@ -10,7 +6,7 @@
       ./hardware-configuration.nix
       ../../modules/home-manager.nix
       ../../common
-      inputs.nixos-hardware.nixosModules.common-gpu-intel
+      inputs.nixos-hardware.nixosModules.common-cpu-intel
       ../gc.nix
     ];
   nixpkgs.config.allowUnfree = true;
@@ -23,6 +19,19 @@
   # Pick only one of the below networking options.
   # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
   #networking.networkmanager.enable = true;  # Easiest to use and most distros use this by default.
+  nixpkgs.config.packageOverrides = pkgs: {
+    intel-vaapi-driver = pkgs.intel-vaapi-driver.override { enableHybridCodec = true; };
+  };
+  hardware.opengl = {
+    enable = true;
+    extraPackages = with pkgs; [
+      intel-media-driver # LIBVA_DRIVER_NAME=iHD
+      intel-vaapi-driver # LIBVA_DRIVER_NAME=i965 (older but works better for Firefox/Chromium)
+      vaapiVdpau
+      libvdpau-va-gl
+    ];
+  };
+  environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Force intel-media-driver
 
   # Set your time zone.
   time.timeZone = "Europe/Berlin";