diff --git a/flake.lock b/flake.lock
index 1f7d989..f602920 100644
--- a/flake.lock
+++ b/flake.lock
@@ -165,11 +165,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1724879978,
-        "narHash": "sha256-xVyj6l5b7XG0ZFaBuB84SJZWtvxguXH8gkwNN46MvnY=",
+        "lastModified": 1724925796,
+        "narHash": "sha256-MglMNrWupMl9GqlRVQ1sHCvSTdg6Q3Ku2++PKsuSZ0I=",
         "ref": "refs/heads/master",
-        "rev": "500ef0ed5ae071daa719c2de7bb3464af61dab80",
-        "revCount": 4,
+        "rev": "d82c13cdf6db31e697e6eb807e500e5d9c575892",
+        "revCount": 5,
         "type": "git",
         "url": "https://git.pfzetto.de/ffmh/thekenlicht"
       },
diff --git a/hardware-configuration.nix b/hardware-configuration.nix
new file mode 100644
index 0000000..38fb3a4
--- /dev/null
+++ b/hardware-configuration.nix
@@ -0,0 +1,59 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "ehci_pci" "usb_storage" "usbhid" "sd_mod" "sr_mod" "sdhci_pci"  ];
+  boot.initrd.kernelModules = [ "amdgpu" ];
+  boot.kernelModules = [ "kvm-amd" "radeon.cik_support=0" "amdgpu.cik_support=1" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "none";
+      fsType = "tmpfs";
+      options = [ "defaults" "size=2G" "mode=755" ];
+    };
+
+  fileSystems."/nix" =
+    { device = "/dev/disk/by-uuid/a1872869-9d8d-4ef2-9fce-16cb0a562e6c";
+      fsType = "btrfs";
+      options = [ "subvol=nix" ];
+    };
+
+  fileSystems."/persist" =
+    { device = "/dev/disk/by-uuid/a1872869-9d8d-4ef2-9fce-16cb0a562e6c";
+      fsType = "btrfs";
+      options = [ "subvol=persist" ];
+      neededForBoot = true;
+    };
+
+  fileSystems."/swap" =
+    { device = "/dev/disk/by-uuid/a1872869-9d8d-4ef2-9fce-16cb0a562e6c";
+      fsType = "btrfs";
+      options = [ "subvol=swap" ];
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/3b635ee4-a134-4d2b-af7d-36e3930314d9";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ { device = "/swap/swapfile"; } ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp2s0.useDHCP = lib.mkDefault true;
+
+  hardware.enableRedistributableFirmware = true;
+  hardware.cpu.amd.updateMicrocode = true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}
diff --git a/stube-pc/home-manager.nix b/stube-pc/home-manager.nix
index 8622583..7757433 100644
--- a/stube-pc/home-manager.nix
+++ b/stube-pc/home-manager.nix
@@ -305,17 +305,23 @@ in
       "panels/panel-2/plugin-ids" = [ 200 201 210 211 212 213 220 221 ];
     };
     xfce4-desktop = {
-      # right monitor (no background image to save displaylink bandwidth)
-      "backdrop/screen0/monitorDP-1/workspace0/image-style" = 0;
-      "backdrop/screen0/monitorDP-1/workspace0/color-style" = 0;
-      "backdrop/screen0/monitorDP-1/workspace0/rgba1" = [0.369  0.361  0.392 1];
-
       # left monitor
-      "backdrop/screen0/monitorVGA-1/workspace0/image-style" = 5;
-      "backdrop/screen0/monitorVGA-1/workspace0/last-image" = "${./background.jpg}";
+      "backdrop/screen0/monitorDP-1/workspace0/image-style" = 5;
+      "backdrop/screen0/monitorDP-1/workspace0/color-style" = 0;
+      "backdrop/screen0/monitorDP-1/workspace0/last-image" = "${./background.jpg}";
+
+      # right monitor (no background image to save displaylink bandwidth)
+      "backdrop/screen0/monitorVGA-1/workspace0/image-style" = 0;
+      "backdrop/screen0/monitorVGA-1/workspace0/color-style" = 0;
+      "backdrop/screen0/monitorVGA-1/workspace0/rgba1" = [0.369  0.361  0.392 1];
+
+      "backdrop/screen0/monitorVGA-1-1/workspace0/image-style" = 0;
+      "backdrop/screen0/monitorVGA-1-1/workspace0/color-style" = 0;
+      "backdrop/screen0/monitorVGA-1-1/workspace0/rgba1" = [0.369  0.361  0.392 1];
 
       # beamer
       "backdrop/screen0/monitorHDMI-1/workspace0/image-style" = 5;
+      "backdrop/screen0/monitorHDMI-1/workspace0/color-style" = 0;
       "backdrop/screen0/monitorHDMI-1/workspace0/last-image" = "${./background.jpg}";
 
       # virtual machine screen
diff --git a/stube-pc/system.nix b/stube-pc/system.nix
index a718c6c..6cf3d8a 100644
--- a/stube-pc/system.nix
+++ b/stube-pc/system.nix
@@ -16,6 +16,7 @@
   networking.hostName = "stube-pc";
   networking.networkmanager.enable = true;
   networking.firewall.enable = true;
+  networking.interfaces.lo.ipv4.addresses = [ { address="127.0.0.3"; prefixLength=8; }];
 
   # timezone
   time.timeZone = "Europe/Berlin";
@@ -69,7 +70,7 @@
 
   services.thekenlicht-daemon = {
     enable = true;
-    serialPort = "/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0";
+    serialPort = "/dev/serial/by-id/usb-Arduino__www.arduino.cc__Arduino_Uno_856333434393513111C0-if00";
   };
 
   # enable gpu support