kern/165284: shutdown failing since upgrade to 9

[Tim M]

>Number:         165284
>Category:       kern
>Synopsis:       shutdown failing since upgrade to 9
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Feb 19 00:40:01 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Tim M
>Release:        9.0-STABLE FreeBSD
>Organization:
-
>Environment:
9.0-STABLE FreeBSD amd64
>Description:
Shutdown starts, syncing disks part succeeds, final power off should then occur, lots of messages appear on the screen regarding uhub (similar to startup messages perhaps), computer powers off then powers back on. Was not occurring on 8.2 and appeared only once upgraded to 9. I cannot get the full output of the messages but it appears as if some code change to relating to usb is preventing shutdown from completing.
>How-To-Repeat:
Attempt to shutdown.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: