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Date: Thu, 1 Jan 2004 18:40:35 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: J S Goldberg <jsg@san.rr.com>
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cc: freebsd-current@freebsd.org
Subject: Re: RC2 hangs on ACPI boot (ASUS a7n8x, nvidia)
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On Wed, 31 Dec 2003, J S Goldberg wrote:

> I installed both 4.9 and 5.1 ok on my ASUS A7N8X (nvidia
> chipset) with AMD 2500 cpu.  After I cvsup'd to 5.2 a few
> days ago, the kernel would no longer boot, hanging after:
>
> Timecounters tick every 10.000 msec

Configuring the APIC causes interrupt storms on the ASUS A7N8X[-E].

> Having seen other comments about nvidia and ACPI, I
> tried booting the CD with acpi disabled - and it worked.

Turning off ACPI helps by preventing configuration of the APIC.

> So... the point of the post:
>
> 1. The observation of this ACPI problem (might be related
> to others I've seen mentioned recently).
>
> 2. A request for a (cleaner) workaround to booting.  E.g.,
> a way to disable acpi by default.

Remove "device apic" from your config file or turn off acpi
using the <mumble> environment variable.

Bruce