From 58581bfbecfc15e7fa63c2fa4be20d2b0654f9b8 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 26 Apr 2012 12:00:49 +1000
Subject: [PATCH] Reset scroll delta when no finger is touching

Provides for a more consistent scrolling experience, otherwise delta
leftovers may trigger extra events even when the actual scrolling action
stays the same.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
---
 src/synaptics.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/synaptics.c b/src/synaptics.c
index 893a5c8..51ecda5 100644
--- a/src/synaptics.c
+++ b/src/synaptics.c
@@ -2398,6 +2398,8 @@ HandleScrolling(SynapticsPrivate *priv, struct SynapticsHwState *hw,
     /* scroll detection */
     if (finger && priv->finger_state == FS_UNTOUCHED) {
 	stop_coasting(priv);
+        priv->scroll.delta_y = 0;
+        priv->scroll.delta_x = 0;
 	if (para->circular_scrolling) {
 	    if ((para->circular_trigger == 0 && edge) ||
 		(para->circular_trigger == 1 && edge & TOP_EDGE) ||