From a168d8b75e2a59db5019a52ed008a66c9b3ac97d Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 15 Dec 2015 08:39:09 +0100
Subject: [PATCH] explicitly disallow looping with external-sync

amend 939808a7
---
 libs/ardour/session_transport.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libs/ardour/session_transport.cc b/libs/ardour/session_transport.cc
index fdd67dd67e..f1486ada78 100644
--- a/libs/ardour/session_transport.cc
+++ b/libs/ardour/session_transport.cc
@@ -163,6 +163,12 @@ Session::force_locate (framepos_t target_frame, bool with_roll)
 void
 Session::request_play_loop (bool yn, bool change_transport_roll)
 {
+	if (_slave && yn) {
+		// don't attempt to loop when not using Internal Transport
+		// see also gtk2_ardour/ardour_ui_options.cc parameter_changed()
+		return;
+	}
+
 	SessionEvent* ev;
 	Location *location = _locations->auto_loop_location();
 	double target_speed;