ACPI Blacklist question

[Markie]

Hello,

I'm not sure whether I should have posted this to questions or current (since
it's an issue with a recent current) or some other list, but hear me out and
perhaps point me in the right direction?

I recently upgraded a play about box from an older current to one .. a day
before the preemption issues arose. All is well, except I found the box would no
longer shutdown automatically using shutdown -p and hitting the power button
would just put the box into a sort of suspend or sleep state.

Well, just now I looked at dmesg and came across this message "ACPI disabled by
blacklist.  Contact your BIOS vendor.".. I believe this is most likely the
cause. I can't remember exactly what BIOS or motherboard is in there but I can
have a look if that is needed. Can anyone tell me why it's been blacklisted
anyway? I didn't used to have any problems with it at all on the older CURRENT.
In fact I was quite impressed that I could turn it off, cleanly, by just hitting
the power button! I'll mess around and see if I can get ACPI loaded anyway
somehow and see if there's any ill effects with it.

Well anyway, thanks in advance!