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:[email protected]]
>Sent: Saturday, February 04, 2006 7:03 AM
>To: Pallipadi, Venkatesh
>Cc: [email protected]
>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 <[email protected]>
>|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 <[email protected]>
>| Signed-off-by: Len Brown <[email protected]>
>
>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 [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
