add somewhat working lnf config

flake.nix

@@ -64,6 +64,17 @@
           modules = [
             ./dad/configuration.nix
           ];
+        };     
+        lnf = nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          modules = [
+                    ({ pkgs, modulesPath, ... }: {
+                      imports = [ (modulesPath + "/installer/cd-dvd/installation-cd-minimal.nix") ];
+                      
+                    })
+                    
+                    ./lnf/configuration.nix
+                  ];
         };
       };
     };

lnf/configuration.nix

@@ -0,0 +1,212 @@
+# 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, ... }:
+{
+  imports = [
+    ./hardware-configuration.nix
+  ];
+
+  boot.loader.grub.enable = true;
+  boot.loader.grub.device = "/dev/vda";
+  boot.loader.grub.useOSProber = true;
+
+  networking.hostName = "nixos-lnf";
+  networking.wireless.enable = true;
+  networking.networkmanager.enable = true;
+  networking.firewall.enable = false;
+
+  time.timeZone = "Europe/Vienna";
+
+  i18n.defaultLocale = "en_US.UTF-8";
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "de_AT.UTF-8";
+    LC_IDENTIFICATION = "de_AT.UTF-8";
+    LC_MEASUREMENT = "de_AT.UTF-8";
+    LC_MONETARY = "de_AT.UTF-8";
+    LC_NAME = "de_AT.UTF-8";
+    LC_NUMERIC = "de_AT.UTF-8";
+    LC_PAPER = "de_AT.UTF-8";
+    LC_TELEPHONE = "de_AT.UTF-8";
+    LC_TIME = "de_AT.UTF-8";
+  };
+
+  services.xserver.xkb = {
+    layout = "de";
+    variant = "";
+  };
+  console.keyMap = "de";
+
+  users.users.kemp = {
+    isNormalUser = true;
+    description = "user";
+    extraGroups = [ "networkmanager" "wheel" "video" ];
+    packages = with pkgs; [ ];
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINGHadFhDCUU/ta3p1FQgpm7NExHkyHNrJbNJP6np5w9 kempinger@ins.jku.at"
+    ];
+  };
+  users.users.root = {
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINGHadFhDCUU/ta3p1FQgpm7NExHkyHNrJbNJP6np5w9 kempinger@ins.jku.at"
+    ];
+  };
+
+  nixpkgs.config.allowUnfree = true;
+
+  environment.systemPackages = with pkgs; [
+    git
+    nil
+    nixd
+    wlr-randr
+    kmsxx
+    libinput
+    vlc
+    jq
+    sway
+    ffmpeg
+    python3
+  
+    (pkgs.writeScriptBin "run-on-output" ''
+        #!/usr/bin/env bash
+        # Usage:   run-on-output <index> <command...>
+        # Example: run-on-output 1 firefox --kiosk https://example.com
+        #          run-on-output 2 vlc --fullscreen /path/to/video.mp4
+    
+        set -euo pipefail
+    
+        if [[ $# -lt 2 ]]; then
+          echo "Usage: run-on-output <index> <command...>" >&2
+          exit 1
+        fi
+    
+        IDX="$1"
+        shift
+    
+        MYUID=$(id -u)
+        SOCK=$(ls /run/user/"$MYUID"/sway-ipc.* 2>/dev/null | head -n1)
+        if [[ -z "$SOCK" ]]; then
+          echo "Error: no sway IPC socket found for uid $MYUID" >&2
+          exit 1
+        fi
+        export SWAYSOCK="$SOCK"
+    
+        # Inherit Wayland env from the running sway instance
+        export WAYLAND_DISPLAY=$(${pkgs.sway}/bin/swaymsg -t get_version -r \
+          | ${pkgs.jq}/bin/jq -r '.loaded_config_file' 2>/dev/null \
+          | xargs -I{} sh -c 'echo "wayland-1"' 2>/dev/null || echo "wayland-1")
+        export XDG_RUNTIME_DIR="/run/user/$MYUID"
+    
+        OUT=$(${pkgs.sway}/bin/swaymsg -t get_outputs -r \
+              | ${pkgs.jq}/bin/jq -r ".[$((IDX-1))].name")
+    
+        if [[ "$OUT" == "null" || -z "$OUT" ]]; then
+          echo "Error: no output found at index $IDX" >&2
+          ${pkgs.sway}/bin/swaymsg -t get_outputs -r \
+            | ${pkgs.jq}/bin/jq -r '.[].name' | nl -v1 -ba >&2
+          exit 1
+        fi
+    
+        echo "Launching on output $IDX ($OUT): $*"
+    
+        # Workspace management only — no exec via swaymsg
+        ${pkgs.sway}/bin/swaymsg "[workspace=$IDX] kill" 2>/dev/null || true
+        sleep 0.3
+        ${pkgs.sway}/bin/swaymsg "workspace $IDX; move workspace to output $OUT"
+    
+        # Launch directly — inherits full PATH and Wayland env from this shell
+        nohup "$@" >> /tmp/run-on-output-$IDX.log 2>&1 &
+    
+        echo "Launched PID $! on workspace $IDX ($OUT)"
+      '')
+  ];
+  
+  programs.firefox.enable = true;
+
+  # ── Sway: multi-monitor Wayland compositor ─────────────────────────────────
+  programs.sway = {
+    enable = true;
+    wrapperFeatures.gtk = true;
+  };
+
+  # Script that runs inside the sway session.
+  # It detects every active output, pins a numbered workspace to each,
+  # then launches one VLC per workspace (→ per monitor).
+  environment.etc."sway/kiosk-start.sh" = {
+    mode = "0755";
+    text = ''
+      #!/usr/bin/env bash
+      exec >> /tmp/kiosk-start.log 2>&1
+      echo "[$(date)] kiosk-start.sh running"
+      sleep 2  # give sway more time to settle
+  
+      readarray -t outputs < <(
+        ${pkgs.sway}/bin/swaymsg -t get_outputs \
+          | ${pkgs.jq}/bin/jq -r '.[] | select(.active) | .name'
+      )
+  
+      echo "[$(date)] Found outputs: ''${outputs[*]}"
+  
+      # for i in "''${!outputs[@]}"; do
+      #   ws=$(( i + 1 ))
+      #   output="''${outputs[$i]}"
+      #   echo "[$(date)] Launching VLC on output $output (workspace $ws)"
+  
+      #   ${pkgs.sway}/bin/swaymsg "workspace $ws output $output"
+      #   ${pkgs.sway}/bin/swaymsg "workspace $ws"
+      #   ${pkgs.sway}/bin/swaymsg "exec ${pkgs.firefox}/bin/firefox"
+      #   sleep 0.5
+      # done
+  
+      echo "[$(date)] Done"
+      
+    '';
+  };
+
+  # Minimal sway config for the kiosk session
+  environment.etc."sway/kiosk.conf".text = ''
+    output * bg #000000 solid_color
+    default_border none
+    hide_edge_borders both
+  
+    input * {
+      xkb_layout de
+    }
+  
+    for_window [app_id="vlc"]  fullscreen enable, inhibit_idle open
+    for_window [class="vlc"]   fullscreen enable, inhibit_idle open
+    for_window [title="VLC.*"] fullscreen enable, inhibit_idle open
+  
+    exec /etc/sway/kiosk-start.sh
+  '';
+  
+  environment.sessionVariables = {
+    QT_QPA_PLATFORM = "wayland";
+    WLR_NO_HARDWARE_CURSORS = "1";
+  };
+
+  # ── greetd: replaces cage, autologins kemp and starts sway ─────────────────
+  services.greetd = {
+    enable = true;
+    settings = {
+      default_session = {
+        command = "${pkgs.sway}/bin/sway --config /etc/sway/kiosk.conf";
+        user = "kemp";
+      };
+    };
+  };
+
+  # ── SSH ─────────────────────────────────────────────────────────────────────
+  services.openssh = {
+    enable = true;
+    settings = {
+      PasswordAuthentication = false;
+      KbdInteractiveAuthentication = false;
+      PermitRootLogin = "prohibit-password";
+    };
+  };
+
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+
+  system.stateVersion = "25.11";
+}

lnf/hardware-configuration.nix

@@ -0,0 +1,24 @@
+# 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" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/88cc8a52-5a15-4782-a322-fe280fa0f7b8";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}