linux-kernel - Re: cpufreq doesn't seem to work in Intel Q9300

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Date:	Fri, 8 Aug 2008 03:10:26 -0700
From:	"S K" <nospamnoham@...il.com>
To:	"Alan Jenkins" <alan-jenkins@...fmail.co.uk>
Cc:	"Zhao Yakui" <yakui.zhao@...el.com>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: cpufreq doesn't seem to work in Intel Q9300

On Fri, Aug 8, 2008 at 1:41 AM, Alan Jenkins
<alan-jenkins@...fmail.co.uk> wrote:
> S K wrote:
>> Hi,
>>
>> I already did the cpufreq.debug thing and it was using the
>> smi_speedstep driver instread of the acpi_speedstep (or whatever is
>> the right name).
>>
>> Alan already told me this is likely an ACPI issue. So, I already sent
>> the acpidump in a prev email (Aug 3rd 08). I'm don't have access to my
>> home machine right now. Will send it again later if you can't get my
>> prev email from the archives.
>>
>
> I could be completely wrong though!
>
> I'd not heard of speedstep_smi before (now I look, it doesn't seem to be
> an option in the cpu frequency scaling Kconfig menu?).
>
> I assumed the error messages you had about SMI were just flack.  I
> thought  acpi-cpufreq was the only option on recent machines - and that
> a quad core  probably counts as recent.  The error messages could be due
> to Fedora scripts unconditionally loading several different modules, to
> find one that works.
>
> I'm not sure how you can answer Zhao's question if you don't already
> know.  I expect Fedora C7 does try loading acpi_cpufreq (as well as
> speedstep_smi).  Whether your machine actually supports acpi_cpufreq is
> the question we're trying to answer.  (This is where looking at Windows,
> or BIOS settings, would help).
>
> Alan
>

My machine has acpi-cpufreq module, but when I try to load it, I get:
FATAL: Error inserting acpi_cpufreq
(/lib/modules/2.6.25.11-97.fc9.i686/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko):
No such device

Btw, yes, cpu freq scaling works in Windows XP. What should I look for
in Windows?

I build my own system, so I have gone through my system BIOS several
times and don't remember anything related to freq scaling. But I will
check again.

Btw, my machine is a Shuttle SG33G5. It has other issues too but right
now heat is the biggest concern.

Thanks,
SK
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