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Date: Tue, 30 May 2006 02:10:38 -0700
From: "David O'Brien" <obrien@freebsd.org>
To: Kevin Oberman <oberman@es.net>
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Cc: Yar Tikhiy <yar@comp.chem.msu.su>, njl@freebsd.org,
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Subject: Re: Freeze due to performance_cx_lowest=LOW
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On Sun, May 28, 2006 at 03:11:54PM -0700, Kevin Oberman wrote:
> This problem has been discussed over on ACPI. It's a problem with the
> local APIC timer which does not run in C3 or lower. Nate is looking at a
> solution for the problem.
> 
> See his message on acpi@ on Sun, 07 May 2006 15:28:29 -0700.
> 
> The fixes are to either not use C3 (or C4 if it's available) or to
> disable APIC.
...
> If the system is UP, there is no really no need for APIC.

AMD64 requires an APIC.  And I do get these lockups on my AMD64 laptop.
So disabling the APIC isn't an option in this case.

-- 
-- David  (obrien@FreeBSD.org)
Q: Because it reverses the logical flow of conversation.
A: Why is top-posting (putting a reply at the top of the message) frowned upon?