dmx daemon and other changes

stube-pc/home-manager.nix

@@ -208,11 +208,15 @@ in
 {
 
   home.persistence."/persist/home/stube" = {
+    files = [
+      # xfconf.settings needs an existing installation (not all values are specified below)
+      ".config/xfce4/xfconf/xfce-perchannel-xml"
+    ];
     directories = [
       # keep mixxx song database between reboots
       ".mixxx"
-      # xfconf.settings needs an existing installation
-      ".config/xfce4"
+      "Music"
+      "Videos"
     ];
     allowOther = false;
   };
@@ -301,7 +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" = "${./background.jpg}";
+
+      # beamer
+      "backdrop/screen0/monitorHDMI-1/workspace0/image-style" = 5;
+      "backdrop/screen0/monitorHDMI-1/workspace0/last-image" = "${./background.jpg}";
+
+      # virtual machine screen
+      "backdrop/screen0/monitorVirtual-1/workspace0/image-style" = 5;
       "backdrop/screen0/monitorVirtual-1/workspace0/last-image" = "${./background.jpg}";
+
       "desktop-icons/file-icons/show-home" = false;
       "desktop-icons/file-icons/show-filesystem" = false;
       "desktop-icons/file-icons/show-trash" = false;

stube-pc/system.nix

@@ -92,6 +92,8 @@
     qlcplus
   ];
 
+  services.logind.extraConfig = "HandlePowerKey=poweroff";
+
   # link current system configuration to /etc/current-nixos
   environment.etc."current-nixos".source = self;
 
@@ -102,8 +104,6 @@
     directories = [
       "/var/log"
       "/var/lib/nixos"
-      "/var/lib/systemd/coredump"
-      "/etc/NetworkManager/system-connections"
     ];
     files = [
       "/etc/machine-id"