Messages in this thread | | | Subject | RE: acpi_cpufreq broken after _PDC patch | Date | Sat, 4 Feb 2006 07:14:40 -0800 | From | "Pallipadi, Venkatesh" <> |
| |
Please use Enhanced speedstep config option as well under Ppower Management->cpufreq (with ACPI option under it enabled too). That will configure speedstep-centrino driver, which should work here. Speedstep-centrino driver is a better option than acpi-cpufreq, as it will do much faster P-state transition.
Thanks, Venki
>-----Original Message----- >From: Gerhard Schrenk [mailto:deb.gschrenk@gmx.de] >Sent: Saturday, February 04, 2006 7:03 AM >To: Pallipadi, Venkatesh >Cc: linux-kernel@vger.kernel.org >Subject: acpi_cpufreq broken after _PDC patch > >Hi, > >commit 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 breaks acpi_cpufreq for >an Intel Centrino notebook with Pentium M 1.60GHz (it's a Medion MD >95600 (aka MSI S260) notebook). > >|gps@medusa:~/scratch/kernel-tree$ git bisect bad >|05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 is first bad commit >|diff-tree 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 (from >d2149b542382bfc206cb28485108f6470c979566) >|Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> >|Date: Sun Oct 23 16:31:00 2005 -0400 >| >| [ACPI] Avoid BIOS inflicted crashes by evaluating _PDC only once >| >| Linux invokes the AML _PDC method (Processor Driver Capabilities) >| to tell the BIOS what features it can handle. While the ACPI >| spec says nothing about the OS invoking _PDC multiple times, >| doing so with changing bits seems to hopelessly confuse the BIOS >| on multiple platforms up to and including crashing the system. >| >| Factor out the _PDC invocation so Linux invokes it only once. >| >| http://bugzilla.kernel.org/show_bug.cgi?id=5483 >| >| Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> >| Signed-off-by: Len Brown <len.brown@intel.com> > >The error message is > >|gps@medusa:~$ sudo modprobe acpi_cpufreq >|FATAL: Error inserting acpi_cpufreq >|(/lib/modules/2.6.15-rc3-bisect1/kernel/arch/i386/kernel/cpu/c pufreq/acpi-cpufreq.ko): >|No such device > >Unfortunately > > git revert 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 > >does not work without merge conflict on top of Linus' tree. > >-- Gerhard > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |