Improve / fix screen lock and brightness buttons

modules/home/i3/default.nix

@@ -45,6 +45,10 @@ in
       xfce.xfce4-screenshooter
     ];
     xsession.enable = true; # Give gui programs access to sessionVariables
+    # Prevent screen from going blank
+    xsession.initExtra = ''
+      ${pkgs.xorg.xset}/bin/xset s off
+    '';
     xsession.windowManager.i3 = {
       enable = true;
       package = pkgs.i3-gaps;