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
--
Daniel J Blueman
On Mon, 25 Feb 2008 21:29:24 +0000 "Daniel J Blueman" <[email protected]> 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.
On Mon, Feb 25, 2008 at 11:48 PM, Andrew Morton
<[email protected]> wrote:
> On Mon, 25 Feb 2008 21:29:24 +0000 "Daniel J Blueman" <[email protected]> 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