diff --git a/gtk2_ardour/monitor_section.cc b/gtk2_ardour/monitor_section.cc
index 40831a3fe4..daeabc583a 100644
--- a/gtk2_ardour/monitor_section.cc
+++ b/gtk2_ardour/monitor_section.cc
@@ -490,6 +490,7 @@ MonitorSection::MonitorSection ()
 	_tearoff->tearoff_window().set_title (X_("Monitor"));
 	_tearoff->tearoff_window().signal_key_press_event().connect (sigc::bind (sigc::ptr_fun (relay_key_press), (Gtk::Window*) &_tearoff->tearoff_window()), false);
 
+	unassign_controllables ();
 	update_processor_box ();
 	_ui_initialized = true;
 
@@ -1217,6 +1218,23 @@ MonitorSection::unassign_controllables ()
 	dim_display->set_controllable (none);
 	solo_boost_control->set_controllable (none);
 	solo_boost_display->set_controllable (none);
+
+	Glib::RefPtr<ToggleAction> tact;
+	tact = ActionManager::get_toggle_action (X_("Monitor Section"), X_("monitor-dim-all"));
+	if (tact) {
+		tact->set_active (false);
+		tact->set_sensitive (false);
+	}
+	tact = ActionManager::get_toggle_action (X_("Monitor Section"), X_("monitor-mono"));
+	if (tact) {
+		tact->set_active (false);
+		tact->set_sensitive (false);
+	}
+	tact = ActionManager::get_toggle_action (X_("Monitor Section"), X_("monitor-cut-all"));
+	if (tact) {
+		tact->set_active (false);
+		tact->set_sensitive (false);
+	}
 }
 
 void
@@ -1241,6 +1259,21 @@ MonitorSection::assign_controllables ()
 	dim_display->set_controllable (_monitor->dim_level_control ());
 	solo_boost_control->set_controllable (_monitor->solo_boost_control ());
 	solo_boost_display->set_controllable (_monitor->solo_boost_control ());
+
+
+	Glib::RefPtr<Action> act;
+	act = ActionManager::get_action (X_("Monitor Section"), X_("monitor-dim-all"));
+	if (act) {
+		act->set_sensitive (true);
+	}
+	act = ActionManager::get_action (X_("Monitor Section"), X_("monitor-mono"));
+	if (act) {
+		act->set_sensitive (true);
+	}
+	act = ActionManager::get_action (X_("Monitor Section"), X_("monitor-cut-all"));
+	if (act) {
+		act->set_sensitive (true);
+	}
 }
 
 string