From owner-freebsd-amd64@FreeBSD.ORG  Wed Jul 12 19:06:10 2006
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Date: Wed, 12 Jul 2006 12:04:19 -0700
From: Michael <spampass@gmail.com>
To: "John Baldwin" <jhb@freebsd.org>
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Cc: freebsd-amd64@freebsd.org
Subject: Re: Turion 64 X2 support in future versions of FreeBSD.
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On 12/07/06, John Baldwin <jhb@freebsd.org> wrote:
> On Tuesday 11 July 2006 17:16, Michael wrote:
> > On 12/07/06, John Baldwin <jhb@freebsd.org> wrote:
> > >
> > > No obvious breakages.  Hmm, does ACPI work fine if you disable apic
> via 'set
> > > hint.apic.0.disabled=1' in the loader?  (When you disable ACPI on amd64
> you
> > > also implicitly disable APIC.)
> >
> > it works fine (no slowing), but i see no second CPU in top output,
> > here dmesg command output (very strange though, since it include
> > strings from previous sessions):
>
> Yes, APIC is required for SMP, but I wanted you to do the test for comparison
> purposes.  Another test you could try is leaving ACPI and APIC enabled and
> just disabling SMP via 'kern.smp.disabled=1' at the loader to see if the
> slow-down only comes from having both cores enabled.

Okay, I did what you requested:
ACPI and APIC enabled, kern.smp.disabled="1" in /boot/loader.conf
Laptop hangs after this strings:

module_register_init: MOD_LOAD (amr_linux, 0xffffffff8062a040, 0) error 6
acd0: DVDR <TSSTcorpCD/DVDW TS-L632D/AS04> at ata0-master UDMA33
ad2: 95396MB <HTS541010G9AT00 MBZOA60A> at ata1-master UDMA100

No progress in about 5 minutes, though it's not completely freezed. If
I press power button something is echoed to screen about ACPI being
not ready.