[zix790prors] Add i3 + fixes

machines/zix790prors/configuration.nix

@@ -24,6 +24,7 @@ with lib;
       kde = true;
       sddm = true;
       wayland = true;
+      x11 = true;
     };
     nfs-mounts.enable = true;
     nvidia.enable = true;
@@ -51,6 +52,11 @@ with lib;
   hardware.graphics.enable = true;
   hardware.graphics.enable32Bit = true;
   
+  # Set DP-0 as primary display for system tray and multi-monitor setup
+  services.xserver.displayManager.sessionCommands = ''
+    ${pkgs.xorg.xrandr}/bin/xrandr --output DP-0 --primary
+  '';
+
   hardware.nvidia = {
     # Modesetting is required.
     modesetting.enable = true;