fsck: broken file system with background check remains broken after bootup

[Wilkinson, Alex]

    0n Tue, Jan 04, 2005 at 09:50:10PM -0600, Craig Boston wrote: 

    >Yes, in FreeBSD 5.3 if ACPI is enabled and working properly, pressing
    >the power button will initiate a graceful shutdown (similar to shutdown
    >-p).  This feature is enabled by default if it is available, so you
    >don't have to do anything special to get it.

How can I confirm that ACPI has been setup to do this ? 

# acpidump -d | grep <???>

 - aW