Bug#603487: linux-image-2.6.32-5-amd64: CPU runs on lowest frequency only, does not increase anymore on demand (as it used to do before)

[Florian <fbugs@gmx.net>]

On 11/15/2010 02:23 AM, Ben Hutchings wrote:
> On Sun, 2010-11-14 at 18:30 +0100, fbugs wrote:
> [...]
>> #cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
>> 1199000
>> #echo 2530000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
>> #cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
>> 1199000
>>
>> #cpufreq-info | grep "hardware limits\|current policy"
>>   hardware limits: 1.20 GHz - 2.53 GHz
>>   current policy: frequency should be within 1.20 GHz and 1.20 GHz.
> 
> OK.  I can't find any change that would explain this.  Please submit a
> bug upstream at <https://bugzilla.kernel.org> under product 'ACPI',
> component 'Power-Processor', and include:
> 
> - The precise model of computer and processor.
> - The last version that worked, i.e. Debian's version 2.6.32-9.  You can
> specify that this is close to stable version 2.6.32.9.
> - The information from cpufreq-info and the result of writing to
> scaling_max_freq.
> 
> Let us know the bug number or URL so we can track it.
> 
> Ben.
> 



Ok. Before I go to kernel.org's bugzilla: I have found out with the help
of snapshot.debian.org that the last working debian kernel version was
2.6.32-20:

---
cpufreq-info | grep "hardware limits\|current policy"
  hardware limits: 1.20 GHz - 2.53 GHz
  current policy: frequency should be within 1.20 GHz and 2.53 GHz.
---

>From 2.6.32-21 on it stopped working. Does this help and/or shall I
anyway submit an upstream bug report?

thanks,

Florian



Lenovo ThinkPad X201, model 3680A78
ThinkPad BIOS 6QET52WW (1.22 ), EC 6QHT30WW-1.11
Intel Core i5 CPU M 540  @ 2.53GHz stepping 02