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SubjectRe: [2.6.25-rc3] ACPI _PPC limiting processor speed...
On Mon, Feb 25, 2008 at 11:48 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
> On Mon, 25 Feb 2008 21:29:24 +0000 "Daniel J Blueman" <daniel.blueman@gmail.com> wrote:
> > My 2.2GHz [1] Thinkpad T61 is unable to get past 1.2GHz, seemingly
> > because of the _PPC ACPI objects [2].
> >
> > Given that the _PPC object is different for both cores, is this more
> > of a BIOS bug or an ACPI interpreter problem? The problem was present
> > in 2.6.24-rc, 2.6.24 final and since.
> >
> > BIOS is 7LETA9WW/2.09, so current - would any further information be
> > useful for debugging this problem, and would dumping the ACPI tables
> > be useful?
> >
> > Thanks,
> > Daniel
> >
> > --- [1]
> >
> > freq-table: table entry 0: 2201000 kHz, 0 index
> > freq-table: table entry 1: 2200000 kHz, 1 index
> > freq-table: table entry 2: 1600000 kHz, 2 index
> > freq-table: table entry 3: 1200000 kHz, 3 index
> > freq-table: table entry 4: 800000 kHz, 4 index
> >
> > --- [2]
> >
> > cpufreq-core: CPU 0: _PPC is 3 - frequency limited
> > cpufreq-core: CPU 1: _PPC is 0 - frequency not limited
>
> (cc linux-acpi)
>
> If nothing happens, please raise a report at bugzilla.kernel.org, thanks.

I've raised this into a Bugzilla entry for tracking and history, and
dumped ACPI tables in binary and hex formats:

http://bugzilla.kernel.org/show_bug.cgi?id=10110

Let me know of anything else useful. If I get time in the next days,
I'll try find a previous working kernel and start bisecting for the
regression.

Thanks,
Daniel
--
Daniel J Blueman


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