don't spin on Session::timecode_transmission_suspended() if disconnected from JACK because it will never be re-enabled (fixes lockups when disconnected)

git-svn-id: svn://localhost/ardour2/branches/3.0@13007 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 6 insertions, 3 deletions

diff --git a/gtk2_ardour/editor_drag.cc b/gtk2_ardour/editor_drag.cc
index 8ae618b37f..797ed4ffd7 100644
--- a/gtk2_ardour/editor_drag.cc
+++ b/gtk2_ardour/editor_drag.cc
@@ -29,6 +29,7 @@
 
 #include "gtkmm2ext/utils.h"
 
+#include "ardour/audioengine.h"
 #include "ardour/audioregion.h"
 #include "ardour/dB.h"
 #include "ardour/midi_region.h"
@@ -2170,9 +2171,11 @@ CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
 			s->cancel_audition ();
 		}
 
-		s->request_suspend_timecode_transmission ();
-		while (!s->timecode_transmission_suspended ()) {
-			/* twiddle our thumbs */
+		if (AudioEngine::instance()->connected()) {
+			s->request_suspend_timecode_transmission ();
+			while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
+				/* twiddle our thumbs */
+			}
 		}
 	}