diff --git a/usr.sbin/devinfo/devinfo.8 b/usr.sbin/devinfo/devinfo.8
--- a/usr.sbin/devinfo/devinfo.8
+++ b/usr.sbin/devinfo/devinfo.8
@@ -35,7 +35,7 @@
 .Nm
 .Op Fl rv
 .Nm
-.Fl u
+.Fl u Op Fl v
 .Nm
 .Fl p Ar dev Op Fl v
 .Sh DESCRIPTION
diff --git a/usr.sbin/devinfo/devinfo.c b/usr.sbin/devinfo/devinfo.c
--- a/usr.sbin/devinfo/devinfo.c
+++ b/usr.sbin/devinfo/devinfo.c
@@ -185,8 +185,16 @@
 	printf("    ");
 	print_resource(res);
 	dev = devinfo_handle_to_device(res->dr_device);
-	if ((dev != NULL) && (dev->dd_name[0] != 0)) {
-		printf(" (%s)", dev->dd_name);
+	if (dev != NULL) {
+		if (dev->dd_name[0] != 0) {
+			printf(" (%s)", dev->dd_name);
+		} else {
+			printf(" (unknown)");
+			if (vflag && *dev->dd_pnpinfo)
+				printf(" pnpinfo %s", dev->dd_pnpinfo);
+			if (vflag && *dev->dd_location)
+				printf(" at %s", dev->dd_location);
+		}
 	} else {
 		printf(" ----");
 	}
@@ -233,7 +241,7 @@
 {
 	fprintf(stderr, "%s\n%s\n%s\n",
 	    "usage: devinfo [-rv]",
-	    "       devinfo -u",
+	    "       devinfo -u [-v]",
 	    "       devinfo -p dev [-v]");
 	exit(1);
 }