I was using NetBSD-7.0 and 7.99.25 on amd64. (1) NetBSD 7.99.28 (GENERIC.201604231800Z) (2) NetBSD 7.0 + patch indicated Both case doesn't seem to fix the problem, Thanks anyway. --- mef%NetBSD.org@localhost Makoto Fujiwara, Chiba, Japan, Narita Airport and Disneyland prefecture.