Engine-dialog: skip audio device update when running

Only update MIDI devices list, which can be dynamic. Audio devices
which are in-use can't be updated, and the GUI may no longer show
the current device (since it is in use).

diff --git a/gtk2_ardour/engine_dialog.cc b/gtk2_ardour/engine_dialog.cc
index 1389e815effe1579b3c06e196ce6a0465334a543..b883bc352eff867632dac493e9854334ac4401ec 100644 (file)
--- a/gtk2_ardour/engine_dialog.cc
+++ b/gtk2_ardour/engine_dialog.cc
@@ -3098,7 +3098,9 @@ EngineControl::device_list_changed ()
                return;
        }
        PBD::Unwinder<uint32_t> protect_ignore_changes (ignore_changes, ignore_changes + 1); // ??
-       list_devices ();
+       if (!ARDOUR::AudioEngine::instance()->running()) {
+               list_devices ();
+       }
        midi_option_changed();
 }