Bug#638913: linux-source-3.0.0: cpu frequency speedstep_centrino Intel(R) Pentium(R) M processor

[Grzegorz Kochański <rumi078@gmail.com>]

2011/8/23 Ben Hutchings <ben@decadent.org.uk>

On Tue, 2011-08-23 at 13:30 +0100, Ben Hutchings wrote:
> On Tue, 2011-08-23 at 09:33 +0200, Grzegorz Kochański wrote:
> >
> >         It works on my T42 with the 1.8 GHz version of this processor,
> >         using
> >         lenny, squeeze and sid kernel versions.  The BIOS version is
> >         3.05a.
> >         Maybe there was a regression in a later BIOS version?
> >
> >         Ben.
> >
> >
> > I have applied the newest BIOS version available at lenovo support for
> > my T42 (model 2374):
> > BIOS Version   3.23 (1RETDRWW)
> > BIOS Date       2007-06-18
> > Embedded Controller Version 3.03
> > CPU Type    Intel(R) Pentium(R) M processr,
> > CPU Speed   1.53GHz
> [...]
>
> Previously you said 1.73 GHz... and Wikipedia doesn't mention a 1.53 GHz
> version so I think that was correct.
>
> Is 'Intel(R) SpeedStep technology' enabled in the BIOS?
>
> Have you run any other kernel version or distribution, in which the
> acpi-cpufreq driver?

                     ...works?

Ben.

sorry for so not long responding,
I was fighting with  Embedded Controller Version 3.03 and finally it is 3.04, but nothing else has changed.

I did not make a mistake BIOS presents:
CPU Speed   1.53GHz

what is the source of /proc/cpuinfo ?
when I load and unload patched speedstep-centrino module /proc/cpuinfo stucked with single frequency, even it was changed by ondemand kernel governor.

so it seems to be still BIOS problem...

rgds
rumi