On Tue, Oct 27, 2009 at 10:22:59PM -0700, Fred Snurd wrote:
quoted text
> 
>From the dmesg (below), this appears to be an old APM-based
>motherboard.  The shutdown(8) manpage states that  not all hardware
>supports automatic power down.  That's fine if this hardware doesn't
>support it, but given the "Attempting to power down..." message, I am
>curious if it might be possible.
> 
> apm0 at bios0: Power Management spec V1.2
> apm0: AC on, battery charge unknown
> acpi at bios0 function 0x0 not configured

Your dmesg show that your machine can do apm and acpi. OpenBSD uses
always apm if both is possible. Sometimes these old machines can
poweroff only with acpi, but not with apm. You can try to disable apm in
the kernel config. OpenBSD then uses acpi. Maybe this works for
poweroff. I have a old machine that can't poweroff with apm, but can do
it with acpi.

Regards
Rene
-- 
Reni Maroufi
info@maroufi.net