AFAIK ugen0 denotes a USB device for which no driver exists. Therefore it is possible that your USV is not configured at all?
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Michael > Sent: 04 May 2007 09:48 AM <snip> > Since a custom kernel is not needed anymore for the APC UPS with OpenBSD > 4.1 because the USV gets properly detected as ugen0 I just kept the > GENERIC kernel. But now I have "Corrupted MAC on input" again. > </snip>