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Date: Tue, 18 Mar 2008 13:24:33 -0700
From: Sam Leffler <sam@freebsd.org>
Organization: FreeBSD Project
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To: Igor Mozolevsky <igor@hybrid-lab.co.uk>
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Cc: freebsd-current@freebsd.org
Subject: Re: Compiling 6.3->7: lapic frequency madness
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Igor Mozolevsky wrote:
> On 18/03/2008, John Baldwin <jhb@freebsd.org> wrote:
>   
>> On Tuesday 18 March 2008 11:49:29 am Igor Mozolevsky wrote:
>>  > On 18/03/2008, John Baldwin <jhb@freebsd.org> wrote:
>>  >
>>  > > First, which one is broken?  Have you tried a RELENG_7_0 kernel and does
>>  it do
>>  > >  the same as a release CD kernel?
>>  >
>>  > Tried both ISO image and RELENG_7_0, they both work ok, but RELENG_7
>>  doesn't...
>>
>>
>> Ok, and it is cpufreq related?  Which cpufreq drivers are attaching to your
>>  CPU?
>>     
>
> Well, I wouldn't say I'm sure it's 100% cpufreq related, but removing
> it from the kernel fixes the problem... It's also possible that
> cpufreq is interfering with something else... Anyhow, I've got both
> est and p4tcc attaching.
>
>   
I'm having lots of problems with cpu freq throttling on t4x laptops.  
The system gets very sluggish and when I check the frequency it's been 
throttled down.  This happens even on ac (haven't checked what powerd is 
doing then).

    Sam