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/cpufreq/acpi-cpufreq.ko):
|No such device
Unfortunately
git revert 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8
does not work without merge conflict on top of Linus' tree.
-- Gerhard
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