@@ -1421,8 +1421,8 @@ def __init__(self, norm=None, cmap=None):
         else:
             self._colorizer = cm.Colorizer(cmap, norm)
 
-        self._id_colorizer = self.colorizer.callbacks.connect('changed', self.changed)
-        self.callbacks = cbook.CallbackRegistry(signals=["changed"])
+        #  self._id_colorizer = self.colorizer.callbacks.connect('changed', self.changed)
+        #  self.callbacks = cbook.CallbackRegistry(signals=["changed"])
 
     def set_array(self, A):
         """
@@ -1478,11 +1478,11 @@ def _set_colorizer(self, colorizer):
                     raise ValueError('The new Colorizer object must have the same'
                                      ' number of variates as the existing data.')
             else:
-                self.colorizer.callbacks.disconnect(self._id_colorizer)
+                # self.colorizer.callbacks.disconnect(self._id_colorizer)
                 self._colorizer = colorizer
-                self._id_colorizer = colorizer.callbacks.connect('changed',
-                                                                 self.changed)
-                self.changed()
+                # self._id_colorizer = colorizer.callbacks.connect('changed',
+                #                                                  self.changed)
+                # self.changed()
         else:
             raise ValueError('Only a Colorizer object can be set to colorizer.')
 
@@ -1496,14 +1496,15 @@ def _get_colorizer(self):
         """
         return self._colorizer
 
+    '''
     def changed(self):
         """
         Call this whenever the mappable is changed to notify all the
         callbackSM listeners to the 'changed' signal.
         """
         self.callbacks.process('changed')
         self.stale = True
-
+    '''
     def format_cursor_data(self, data):
         """
         Return a string representation of *data*.
 
@@ -5380,7 +5380,7 @@ def on_changed():
                 collection.vbar.set_cmap(collection.get_cmap())
                 collection.hbar.set_cmap(collection.get_cmap())
 
-            collection.callbacks.connect('changed', on_changed)
+            collection.colorizer.callbacks.connect('changed', on_changed)
 
         return collection
 
 
@@ -1118,7 +1118,7 @@ def changed(self):
         for label, cv, alpha in zip(self.labelTexts, self.labelCValues, alphas):
             label.set_alpha(alpha)
             label.set_color(self.colorizer.to_rgba(cv))
-        super().changed()
+        # super().colorizer.changed()
 
     def _autolev(self, N):
         """
 
@@ -2103,7 +2103,7 @@ def test_scalarmap_update(fig_test, fig_ref):
     # force a draw
     fig_test.canvas.draw()
     # mark it as "stale"
-    sc_test.changed()
+    sc_test.colorizer.changed()
 
     # ref
     ax_ref = fig_ref.add_subplot(111, projection='3d')