raspberry pi home screen - support x

flake.nix

@@ -131,6 +131,7 @@
         };
         # nix build .#nixosConfigurations.raspiimage.config.system.build.sdImage
         # sudo dd if=result/sd-image/nixos-sd-image-21.11.20211201.a640d83-aarch64-linux.img of=/dev/sda bs=4M conv=fsync status=progress
+        # make sure to update eeprom https://nixos.wiki/wiki/NixOS_on_ARM/Raspberry_Pi_4#Board-specific_installation_notes
         raspiimage = nixpkgs-stable.lib.nixosSystem {
           system = "aarch64-linux";
           modules = [

nixos/boxes/homescreen/default.nix

@@ -1,23 +1,5 @@
 { config, pkgs, inputs, lib, ... }: {
-  imports = [ ];
-  boot = {
-    kernelPackages = pkgs.linuxPackages_rpi4;
-    tmpOnTmpfs = true;
-    initrd.availableKernelModules = [ "usbhid" "usb_storage" ];
-    kernelParams = [
-      "8250.nr_uarts=1"
-      "console=ttyAMA0,115200"
-      "console=tty1"
-      # Some gui programs need this
-      "cma=128M"
-    ];
-  };
-
-  boot.loader.raspberryPi = {
-    enable = true;
-    version = 4;
-  };
-  boot.loader.grub.enable = false;
+  imports = [ inputs.nixos-hardware.nixosModules.raspberry-pi-4 ];
 
   networking = {
     hostName = "homescreen";
@@ -34,9 +16,11 @@
     passwordAuthentication = false;
   };
 
+  hardware.raspberry-pi."4".fkms-3d.enable = true;
+
   services.xserver = {
     enable = true;
-    displayManager.gdm.enable = true;
+    displayManager.lightdm.enable = true;
     desktopManager.gnome.enable = true;
   };