i386/108139: System hangs after /sbin/shutdown

[Jürgen Dankoweit]

>Number:         108139
>Category:       i386
>Synopsis:       System hangs after /sbin/shutdown
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jan 20 07:30:22 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Jürgen Dankoweit
>Release:        FreeBSD 6.2 RELEASE
>Organization:
>Environment:
FreeBSD primergy470.juergendankoweit.net 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan  19 10:18:40 CET 2007     juergen at primergy470.juergendankoweit.net:/usr/obj/usr/src/sys/PRIMERGY470  i386

>Description:
Hello,

everytime a "shutdown -h now", "shutdown -r now", "shutdown -p now" or "reboot" is startet, the shutdown process hangs directly after "Uptime hh:mm:ss". The system is dead, no keyboard, no mouse nothing. Only the reset button helps.
This is independend from ACPI or APM. Both are disabled on that machine.

The described problems or either on SMP machines or on single CPU machines that I have tested (two single and one SMP).
>How-To-Repeat:
Starting the shutdown process with "shutdown -h now", "shutdown -r now", "shutdown -p now" or "reboot"
>Fix:

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