ACPI utilities

[Peter Jeremy]

I have an Athlon system which isn't co-operating with the ACPI in
-stable (I haven't tried -current yet).  I notice that the general
recommendation in -current is to provide the output of acpidump but
none of the ACPI userland has been MFC'd.

I just had a quick try and building the -current userland on -stable
and found this is non-trivial because it appears that the APIs are
different between the two versions - AcpiOs{Read,Write}{Port,Memory}()
have different prototypes.

Any suggestions on the way forward?

Peter