From 4f56ce929cab45a3a6e1a81700da52bb9bdbfc0f Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Sat, 18 Dec 2010 15:42:30 +0100 Subject: [PATCH] Input: synaptics - ignore bogus mt packet In multitouch mode, at least one device (fw: 7.4 id: 0x1c0b1) sometimes sends a final main packet with x == 1. Since the normal values are above 1472, this is clearly bogus. At the same time, a two-finger touch is signaled, even though only one finger was on the pad to begin with. This patch ignores the packet altogether, removing the problem. Acked-by: Chris Bagwell Acked-by: Chase Douglas Acked-by: Dmitry Torokhov Signed-off-by: Henrik Rydberg --- drivers/input/mouse/synaptics.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 6514928fd35f..720729afe6dc 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -548,7 +548,7 @@ static void synaptics_process_packet(struct psmouse *psmouse) return; } - if (hw.z > 0) { + if (hw.z > 0 && hw.x > 1) { num_fingers = 1; finger_width = 5; if (SYN_CAP_EXTENDED(priv->capabilities)) { @@ -582,7 +582,7 @@ static void synaptics_process_packet(struct psmouse *psmouse) if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); - if (hw.z > 0) { + if (num_fingers > 0) { input_report_abs(dev, ABS_X, hw.x); input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y); } -- 2.34.1