diff --git a/jupyter_bokeh/widgets.py b/jupyter_bokeh/widgets.py
index d18d5a4..3f5fb90 100644
--- a/jupyter_bokeh/widgets.py
+++ b/jupyter_bokeh/widgets.py
@@ -130,8 +130,8 @@ def _sync_model(self, _, content, _buffers):
                 descriptor._set(submodel, old, new, hint=hint, setter=self)
             except Exception:
                 return
-            for cb in submodel._callbacks.get(attr, []):
-                cb(attr, old, new)
+#            for cb in submodel._callbacks.get(attr, []):
+#                cb(attr, old, new)
         elif kind == 'MessageSent':
             self._document.callbacks.trigger_json_event(content["msg_data"])