From c01e37171ef5ebf6da0ec2cd9ef39873634979ee Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 5 Nov 2013 02:06:20 +0100
Subject: [PATCH] keep processing LV2 Ringbuffer once it is allocated

Discard messages in LV2PluginUI::write_to_ui() if the
ringbuffer exists but the UI is not active.

This fixes "[ERROR]: Error writing from plugin to UI" messages
if the UI was once active but has been closed since.

This is a hotfix solution, eventually the LV2 backend should be updated
and a function LV2Plugin::disable_ui_emmission() implemented.
---
 gtk2_ardour/lv2_plugin_ui.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index c273c1f4dd..07e8699ebc 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -478,12 +478,12 @@ void
 LV2PluginUI::on_window_hide()
 {
 	//printf("LV2PluginUI::on_window_hide\n");
-	_message_update_connection.disconnect();
 
 	if (_lv2->is_external_ui()) {
 		if (!_external_ui_ptr) { return; }
 		LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
 		if (!_lv2->is_external_kx()) { return ; }
+		_message_update_connection.disconnect();
 		_screen_update_connection.disconnect();
 		_external_ui_ptr = NULL;
 		suil_instance_free((SuilInstance*)_inst);