> On Thu, 2008-08-07 at 02:35 -0700, S K wrote:
> > Anyone care to help?
> >
> Will you please confirm whether the acpi_cpufreq driver is used on your
> machine?
> Please enable CONFIG_CPUFREQ_DEBUG in kernel configuration and boot the
> system with "cpufreq.debug=7".
> After the system is booted, please attach the output of dmesg.
>
> please attach the output of acpidump using the latest pmtools at
>
http://www.lesswatts.org/patches/linux_acpi/
>
> Of course you can open a new bug in bugzilla and attach the output of
> dmesg, acpidump, lspci -vxxx.
>
>
http://bugzilla.kernel.org/enter_bug.cgi?product=ACPI
>
> Thanks.
>
> > -SK
> >
> > 2008/8/3 S K <nospamnoham@gmail.com>:
> > > Hi,
> > >
> > > I'm attaching the acpidump output. Can someone (ACPI guys??) please
> > > me help figure this out?
> > > Is there any other info that's needed to debug this?
> > >
> > > I can be a tester for this and even do some development within the
> > > limits of my understanding.
> > >
> > > Thanks,
> > > SK
> > >
> > > On Sun, Aug 3, 2008 at 3:31 AM, none <aj504@student.cs.york.ac.uk> wrote:
> > >> S K wrote:
> > >>> Hi,
> > >>>
> > >>> I have an Intel Core 2 Quad and running kernel
> > >>> 2.6.25.11-97.fc9.i686. cpufreq doesn't seem to work. The cpufreq
> > >>> scaling monitor in Gnome says CPU Freq scaling is not supported in my
> > >>> CPU. The CPU can run at 2.0 and 2.5 GHz but mine always runs at 2.5
> > >>> GHz in Linux.
> > >>>
> > >>> So I checked /sys and there is no cpufreq dir in /sys/...
> > >>>
> > >>> # ls /sys/devices/system/cpu/
> > >>> cpu0 cpu1 cpu2 cpu3 cpuidle sched_mc_power_savings
> > >>> # ls /sys/devices/system/cpu/cpuidle/
> > >>> current_driver current_governor_ro
> > >>>
> > >>> I have no clue what cpuidle directory is for.
> > >>>
> > >>> I added cpufreq.debug=7 in kernel boot params and saw the following in
> > >>> the dmesg:
> > >>>
> > >>> speedstep-smi: No supported Intel CPU detected.
> > >>> cpufreq-core: CPU 0: _PPC is 0 - frequency not limited
> > >>> cpufreq-core: CPU 3: _PPC is 0 - frequency not limited
> > >>> cpufreq-core: CPU 1: _PPC is 0 - frequency not limited
> > >>> cpufreq-core: CPU 2: _PPC is 0 - frequency not limited
> > >>> cpuidle: using governor ladder
> > >>> cpuidle: using governor menu
> > >>>
> > >>> I looked at arch/x86/kernel/cpu/cpufreq/speedstep-smi.c and it seems
> > >>> to detect only Pentium IIIs.
> > >>>
> > >>> Anyone know what files have the cpufreq code for Intel Core 2?
> > >>> Does cpufreq support Intel Core 2 Quads? Especially the Q9300? If not,
> > >>> anything I can do to help?
> > >>
> > >> I have an Intel Core 2 Duo and it uses the ACPI cpufreq driver; your
> > >> Quad should do the same. So this is likely an ACPI/BIOS issue.
> > >>
> > >> If you ask ACPI people they will ask you to post the output of acpidump.
> > >> Also you should probably check if you have a BIOS option that needs to be
> > >> enabled for this to work.
> > >>
> > >> BTW, cpuidle is something quite different, it is about how to save power
> > >> when CPU is doing nothing (i.e. idle :-). Cpu frequency scaling is how to
> > >> save power when CPU is working (but doesn't need to run flat out).
> > >>
> > >> Alan
> > >>
> > >
>
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