Index: head/sys/dev/usb/usb_hub.c
===================================================================
--- head/sys/dev/usb/usb_hub.c
+++ head/sys/dev/usb/usb_hub.c
@@ -720,8 +720,10 @@
 		if ((sc->sc_st.port_change & UPS_C_CONNECT_STATUS) ||
 		    (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))) {
 			if (timeout) {
-				DPRINTFN(0, "giving up port reset "
-				    "- device vanished\n");
+			       DPRINTFN(0, "giving up port %d reset - "
+				   "device vanished: change %#x status %#x\n",
+				   portno, sc->sc_st.port_change,
+				   sc->sc_st.port_status);
 				goto error;
 			}
 			timeout = 1;