On 6/27/14, Theo de Raadt <dera...@cvs.openbsd.org> wrote: >> On 2014-06-26, Scott Vanderbilt <li...@datagenic.com> wrote: >> > Having done a little man page reading on boot-time configuration, I >> > learned about the existence of ukc. I'm wondering whether something >> > like >> > >> > ukc> disable acpi0 >> > >> > might circumvent the kernel panic and allow the boot to successfully >> > complete. I'm hoping that since this is a server, ACPI is non-essential. >> > >> > Just grasping at straws in an effort to get this machine up and running >> > >> > again. >> >> I think you should consider ACPI essential on pretty much any x86 >> machine from the last 4-5 years or so - servers, laptops, standard PCs. > > Yes, ACPI is essential. It is the modern way to interface to the hardware; > it is the modern BIOS API.
viva pragmatism! http://www.openbsd.org/lyrics.html#45 :) --patrick > The other BIOS interfaces (MPBIOS and PCIBIOS) are totally unreliable and > rotting on most machines these days. The vendors include support, but > they > do not verify their correctness. > >> In an emergency such as this you might get away with it briefly, but >> some devices are likely not to work, and it's not recommended leaving >> it like that for any length of time, ACPI is involved in a lot of >> system controls (thermal controls, power etc) and most modern machines >> are just not designed/tested to work without it. > > Stuart is correct. Those of you turning off ACPI are relying on an > interface model we have repeatedly described as broken.