ACPI was the culprit

[David Rhodus]

Unless you have compiled your kernel with 'device acpica'
you are not using ACPI under DragonFly.
-DR

Dave Leimbach wrote:

So for FreeBSD 5.2.1 at least ACPI was the reason I couldn't boot the
installer CD.  Choosing either a "Safe Mode" or "Disable ACPI" boot 
worked.

Is there a way to disable this at boot time in DragonFly as well by 
interrupting the loader process?

Dave