Index: sys/dev/atkbdc/psm.c
===================================================================
--- sys/dev/atkbdc/psm.c
+++ sys/dev/atkbdc/psm.c
@@ -473,6 +473,7 @@
 	int		muxtpbuttons;	/* Touchpad button state */
 	int		muxmsbuttons;	/* Mouse (trackpoint) button state */
 	struct timeval	muxmidtimeout;	/* middle button supression timeout */
+	int		muxsinglesyna;	/* One active port with Synaptics */
 #ifdef EVDEV_SUPPORT
 	struct evdev_dev *evdev_a;	/* Absolute reporting device */
 	struct evdev_dev *evdev_r;	/* Relative reporting device */
@@ -673,6 +674,7 @@
 static probefunc_t	enable_mmanplus;
 static probefunc_t	enable_synaptics;
 static probefunc_t	enable_synaptics_mux;
+static probefunc_t	enable_single_synaptics_mux;
 static probefunc_t	enable_trackpoint;
 static probefunc_t	enable_versapad;
 static probefunc_t	enable_elantech;
@@ -695,6 +697,8 @@
 	 */
 	{ MOUSE_MODEL_SYNAPTICS,	/* Synaptics Touchpad on Active Mux */
 	  0x00, MOUSE_PS2_PACKETSIZE, enable_synaptics_mux },
+	{ MOUSE_MODEL_SYNAPTICS,	/* Single synaptics on Active Mux */
+	  0xc0, MOUSE_SYNAPTICS_PACKETSIZE, enable_single_synaptics_mux },
 	{ MOUSE_MODEL_NET,		/* Genius NetMouse */
 	  0x08, MOUSE_PS2INTELLI_PACKETSIZE, enable_gmouse },
 	{ MOUSE_MODEL_NETSCROLL,	/* Genius NetScroll */
@@ -6342,18 +6346,16 @@
 		    active_ports_count);
 
 	/* psm has a special support for GenMouse + SynTouchpad combination */
-	if (active_ports_count >= 2) {
-		for (port = 0; port < KBDC_AUX_MUX_NUM_PORTS; port++) {
-			if ((active_ports_mask & 1 << port) == 0)
-				continue;
-			VLOG(3, (LOG_DEBUG, "aux_mux: probe port %d\n", port));
-			set_active_aux_mux_port(kbdc, port);
-			probe = enable_synaptics(sc, arg);
-			if (probe) {
-				if (arg == PROBE)
-					sc->muxport = port;
-				break;
-			}
+	for (port = 0; port < KBDC_AUX_MUX_NUM_PORTS; port++) {
+		if ((active_ports_mask & 1 << port) == 0)
+			continue;
+		VLOG(3, (LOG_DEBUG, "aux_mux: probe port %d\n", port));
+		set_active_aux_mux_port(kbdc, port);
+		probe = enable_synaptics(sc, arg);
+		if (probe) {
+			if (arg == PROBE)
+				sc->muxport = port;
+			break;
 		}
 	}
 
@@ -6375,7 +6377,15 @@
 	}
 	empty_both_buffers(kbdc, 10);	/* remove stray data if any */
 
-	return (probe);
+	if (active_ports_count == 1)
+		sc->muxsinglesyna = probe;
+	return (active_ports_count != 1 ? probe : FALSE);
+}
+
+static int
+enable_single_synaptics_mux(struct psm_softc *sc, enum probearg arg)
+{
+	return (sc->muxsinglesyna);
 }
 
 static int