From 9602a11ef3b6baf12f0bafa3543e17239d9a4a67 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 14 Sep 2024 17:46:14 +0200
Subject: [PATCH] LV2: push output port data to GUI at first run

This fixes an issue with some plugins UIs that depend on a
"changed" signal e.g. zynaddsubfx
---
 gtk2_ardour/lv2_plugin_ui.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index 45e1a464cf..afe9382440 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -475,6 +475,7 @@ LV2PluginUI::lv2ui_instantiate(const std::string& title)
 
 		if (_lv2->parameter_is_output(i) && is_update_wanted(i)) {
 			_output_ports.push_back (i);
+			_values_last_sent_to_ui[i] -= 1; // force update
 		}
 	}