--- util-linux/blkid.c	2012-04-22 03:45:24.000000000 +0200
+++ util-linux/blkid.c	2012-06-14 17:14:31.395189699 +0200
@@ -18,14 +18,18 @@
 int blkid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int blkid_main(int argc UNUSED_PARAM, char **argv)
 {
+	int part_found = 0;
 	int scan_devices = 1;
 
 	while (*++argv) {
 		/* Note: bogus device names don't cause any error messages */
-		add_to_uuid_cache(*argv);
+		if (add_to_uuid_cache(*argv))
+			part_found = 1; // at least data for one partition found
 		scan_devices = 0;
 	}
 
+	// show all partitions only, if blkid called without arguments or if uuidCache not empty
+	if ((scan_devices == 1) || (part_found))
 	display_uuid_cache(scan_devices);
 	return 0;
 }