drivers/input/mouse/psmouse-base.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

Index: linux/drivers/input/mouse/psmouse-base.c
===================================================================
--- linux.orig/drivers/input/mouse/psmouse-base.c
+++ linux/drivers/input/mouse/psmouse-base.c
@@ -1029,6 +1029,23 @@ static int psmouse_switch_protocol(struc
 	else
 		psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
 
+	/*
+	 * If mouse's packet size is 3 there is no point in polling the
+	 * device in hopes to detect protocol reset - we won't get less
+	 * than 3 bytes response anyhow.
+	 */
+	if (psmouse->pktsize == 3)
+		psmouse->resync_time = 0;
+
+	/*
+	 * Some smart KVMs fake response to POLL command returning just
+	 * 3 bytes and messing up our resync logic, so if initial poll
+	 * fails we won't try polling the device anymore. Hopefully
+	 * such KVM will maintain initially selected protocol.
+	 */
+	if (psmouse->resync_time && psmouse->poll(psmouse))
+		psmouse->resync_time = 0;
+
 	sprintf(psmouse->devname, "%s %s %s",
 		psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);