1 files changed, 2 insertions, 0 deletions
diff --git a/src/newt/classes/com/sun/javafx/newt/Window.java b/src/newt/classes/com/sun/javafx/newt/Window.java
index b9d8bde42..8260b1a16 100755
--- a/src/newt/classes/com/sun/javafx/newt/Window.java
+++ b/src/newt/classes/com/sun/javafx/newt/Window.java
@@ -286,6 +286,7 @@ public abstract class Window implements NativeWindow
         }
         owner = cur;
         lockedStack = new Exception("NEWT Surface previously locked by "+Thread.currentThread());
+        screen.getDisplay().lockDisplay();
         return LOCK_SUCCESS;
     }
 
@@ -302,6 +303,7 @@ public abstract class Window implements NativeWindow
         }
         owner = null;
         lockedStack = null;
+        screen.getDisplay().unlockDisplay();
         notifyAll();
         // We leave the ToolkitLock unlock to the specializtion's discretion, 
         // ie the implicit JAWTWindow in case of AWTWindow