update pi4

hosts/pi4/configuration.nix

@@ -32,7 +32,7 @@ in
   ];
 
   boot = {
-    kernelPackages = pkgs.linuxKernel.packages.linux_rpi4;
+    kernelPackages = pkgs.linuxPackages_latest;
     initrd.availableKernelModules = [
       "xhci_pci"
       "usbhid"
@@ -71,14 +71,14 @@ in
     };
   };
 
-  # systemd.services.btattach = {
-  #   before = [ "bluetooth.service" ];
-  #   after = [ "dev-ttyAMA0.device" ];
-  #   wantedBy = [ "multi-user.target" ];
-  #   serviceConfig = {
-  #     ExecStart = "${pkgs.bluez}/bin/btattach -B /dev/ttyAMA0 -P bcm -S 3000000";
-  #   };
-  # };
+  systemd.services.btattach = {
+    before = [ "bluetooth.service" ];
+    after = [ "dev-ttyAMA0.device" ];
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      ExecStart = "${pkgs.bluez}/bin/btattach -B /dev/ttyAMA0 -P bcm -S 3000000";
+    };
+  };
 
   environment.systemPackages = with pkgs; [
     vim
@@ -105,8 +105,6 @@ in
 
   virtualisation.docker.enable = true;
 
-  console.enable = false;
-
   # This option defines the first version of NixOS you have installed on this particular machine,
   # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
   #