[ltp] Speed stepping below 798000 Hz

[Dragos Vingarzan]

OK, but my T43p with a 2.13G CPU also does not go below 800Mhz. The 
thing is that in windows it even drops to 300!!!
I'm using 2.6.12-gentoo-r10 and here are the 
/sys/devices/system/cpu/cpu0/cpufreq/ readings:

cartman cpufreq # cat cpuinfo_min_freq
800000
cartman cpufreq # cat scaling_available_frequencies
2133000 1866000 1600000 1333000 1066000 800000

Anybody has any ideas on how to tweak this list? Or do you know a kernel 
patch for it? I would really like to run it at 300 when reading emails 
as the autonomy is really crapy compared to my good old T42...

Also I observer something... if I put in BIOS that on battery it should 
switch to max battery life, also the list of available frequencies 
changes on power disconnect and it locks to only 800000...

Cheers,
Dragos


André Wyrwa wrote:

> Alex Polite wrote:
>
>> On 10/9/05, Noah Dain <noahdain@gmail.com> wrote:
>>
>>> what does:
>>> $ cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
>>>
>>
>> It gives me 798000. Guess I'm out of luck :(
>>
>> Thanks a lot for all the info.
>
>
> Your processor is a PIII-M, that features Enhanced Speedstep, which 
> only has a low and high state, nothing in between.
>
> See:
>
> http://www.thinkwiki.org/wiki/Intel_Mobile_Pentium_III-M
>
> http://www.thinkwiki.org/wiki/SpeedStep
>
> André.