Index: /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIExtraDataEventHandler.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIExtraDataEventHandler.cpp	(revision 50683)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIExtraDataEventHandler.cpp	(revision 50684)
@@ -103,5 +103,7 @@
                 /* If extra data GUI/HidLedsSync is not present in VM config or set
                  * to 1 then sync is enabled. Otherwise, it is disabled. */
-                bool f = (strValue.isEmpty() || strValue == "1") ? true : false;
+
+                /* (temporary disabled by default) */
+                bool f = (strValue == "1") ? true : false;
                 emit sigHidLedsSyncStateChanged(f);
             }
Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp	(revision 50683)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp	(revision 50684)
@@ -662,5 +662,7 @@
     /* If extra data GUI/HidLedsSync is not present in VM config or set
      * to 1 then sync is enabled. Otherwise, it is disabled. */
-    if (strHidLedsSyncSettings.isEmpty() || strHidLedsSyncSettings == "1")
+
+    /* (temporary disabled by default) */
+    if (strHidLedsSyncSettings == "1")
         m_isHidLedsSyncEnabled = true;
     else