2 files changed, 12 insertions, 4 deletions
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
index 509839f55..c992b3cb2 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
@@ -335,8 +335,11 @@ public class GLDrawableHelper {
       desired goal is to be able to implement GLAutoDrawable's in terms of
       the GLContext's public APIs, and putting it into a separate
       class helps ensure that we don't inadvertently use private
-      methods of the GLContext or its implementing classes.<br>
-   * <br>
+      methods of the GLContext or its implementing classes.
+      <p>
+      Note: Locking of the surface is implicit done by {@link GLContext#makeCurrent()},
+      where unlocking is performed by the latter {@link GLContext#release()}.
+      </p>
    *
    * @param drawable
    * @param context
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
index 02a94f31c..ba64127d4 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
@@ -135,7 +135,12 @@ public abstract class GLDrawableImpl implements GLDrawable {
   protected void destroyHandle() {}
   
   /** called with locked surface @ setRealized(true) or @ lockSurface(..) when surface changed */ 
-  protected void updateHandle() {}
+  protected void updateHandle() {
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": updateHandle: "+getClass().getSimpleName()+": "+this);
+            Thread.dumpStack();
+        }      
+  }
 
   public long getHandle() {
     return surface.getSurfaceHandle();
@@ -148,7 +153,7 @@ public abstract class GLDrawableImpl implements GLDrawable {
   public final synchronized void setRealized(boolean realizedArg) {
     if ( realized != realizedArg ) {
         if(DEBUG) {
-            System.err.println(getThreadName() + ": setRealized: "+getClass().getName()+" "+realized+" -> "+realizedArg);
+            System.err.println(getThreadName() + ": setRealized: "+getClass().getSimpleName()+" "+realized+" -> "+realizedArg);
         }
         realized = realizedArg;
         AbstractGraphicsDevice aDevice = surface.getGraphicsConfiguration().getScreen().getDevice();