Fix

spyder/api/plugins.py

@@ -1584,7 +1584,7 @@ def set_ancestor(self, ancestor_widget):
     # ------------------------------------------------------------------------
     @property
     def dockwidget(self):
-        return self.get_widget().widget.dockwidget
+        return self.get_widget().dockwidget
 
     @property
     def options_menu(self):

spyder/app/mainwindow.py

@@ -347,11 +347,12 @@ def register_plugin(self, plugin):
         # First time plugin starts
         if plugin.get_conf_option('first_time', True):
             logger.info("Tabify {} dockwidget...".format(plugin.NAME))
-            if isinstance(plugin, SpyderDockablePlugin):
+            if (isinstance(plugin, SpyderDockablePlugin)
+                    and plugin.NAME != Plugins.Console):
                 try:
                     next_to_plugin = self.get_plugin(plugin.TABIFY)
                 except SpyderAPIError:
-                    next_to_plugin = Plugins.Console
+                    next_to_plugin = self.get_plugin(Plugins.Console)
 
                 self.tabify_plugins(plugin, next_to_plugin)
 
@@ -4060,7 +4061,7 @@ def run_spyder(app, options, args):
 
     if main.console:
         namespace = CONF.get('internal_console', 'namespace', {})
-        main.console.start_interpreter(namespace)
+        # main.console.start_interpreter(namespace)
         main.console.set_namespace_item('spy', Spy(app=app, window=main))
 
     # Don't show icons in menus for Mac

spyder/plugins/console/widgets/main_widget.py

@@ -259,6 +259,7 @@ def setup(self, options):
 
         self.shell.set_external_editor(
             self.get_option('external_editor/path'), '')
+        self.start_interpreter(self.get_option('namespace'))
 
     def on_option_update(self, option, value):
         if option == 'max_line_count':