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SubjectRe: CPUFREQ/speedstep on Intel 955X chipset based system
On Sun, May 29, 2005 at 11:53:03PM +0200, Michael Thonke wrote:
> Matthias-Christian Ott schrieb:
>
> > Michael Thonke wrote:
> >
> >> Hello,
> >>
> >> I recently bought an Asus P5WAD2 motherboard which uses the Intel 955x
> >> chipset.
> >> I noticed that CPUFREQ/speedsteps with the same kernel and same
> >> config from
> >> my system with Intel 925XE and Intel Pentium 640 does not work on the
> >> system with
> >> Intel 955X chipset (the processor is the same). In Windows it works
> >> perfectly on 925XE
> >> and 955X chipset.
> >> The kernels I used
> >>
> >> 2.6.12-rc5 vanilla with git4 patch
> >> 2.6.12-rc5-mm1.
> >>
> >> I attached the output of dmesg and `cat /proc/cpuinfo`
> >>
> > Please turn on cpufreq debugging (see Documentation/ for details) and
> > post the output.
> >
> Hello,
>
> the debug infos show following when I try to modprobe speedstep-centrino.
>
> speedstep-centrino: Invalid control/status registers (1 - 1)
> speedstep-centrino: <6>speedstep-centrino: invalid ACPI data
> speedstep-centrino: <6>speedstep-centrino: found unsupported CPU
> with Enhanced SpeedStep: send /proc/cpuinfo to Jeremy Fitzhardinge
> <jeremy@goop.org>
> speedstep-centrino: Invalid control/status registers (1 - 1)
> speedstep-centrino: <6>speedstep-centrino: invalid ACPI data
>
> cpuinfo follows

Can you please try acpi-cpufreq driver instead. That should work in this case.

Thanks,
Venki

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