From c78426968ffbfd630c401f5acedb2b2b47789dbe Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 2 Oct 2015 22:07:24 -0400
Subject: [PATCH] avoid handling pitchbend (fader) messages while SHIFT
 modifier is active.

See comment in code for more detail
---
 libs/surfaces/mackie/surface.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libs/surfaces/mackie/surface.cc b/libs/surfaces/mackie/surface.cc
index 562807ce79..4b5a0ef797 100644
--- a/libs/surfaces/mackie/surface.cc
+++ b/libs/surfaces/mackie/surface.cc
@@ -403,6 +403,14 @@ Surface::handle_midi_pitchbend_message (MIDI::Parser&, MIDI::pitchbend_t pb, uin
 		turn_it_on ();
 	}
 
+	if (_mcp.main_modifier_state() & MackieControlProtocol::MODIFIER_SHIFT) {
+		/* user is doing a reset to unity gain but device sends a PB
+		 * message in the middle of the touch on/off messages. Ignore
+		 * it.
+		 */
+		return;
+	}
+
 	Fader* fader = faders[fader_id];
 
 	if (fader) {