[indiana-discuss] b111a: Power Management and nwam-issue ?

[Antonello Cruz]

Mark Haywood wrote:
> Antonello Cruz wrote:
>> Aubrey Li wrote:
>>> On Tue, Apr 28, 2009 at 3:05 AM, Henrik Johansson 
>>> <henrikj at henkis.net> wrote:
>>>>
>>>> My power management works fine when I first boot my Lenovo T61, but 
>>>> after
>>>> putting it into suspend mode it will always run on the highest 
>>>> frequency.
>> I see the same behavior with a Dell XPS 1330M
>> I've notice that if I disconnect the power adapter and then reconnect, 
>> it goes to a more same behavior.
> So that I can do some investigation ... I assume you are running CPUPM 
> in poll-mode?
That's right, I've attached my power.conf file


Since I cannot type (apparently) here is what happens:
If I suspend/resume, after resume powertop report max P-state 
(2001Mhz(turbo) 100%) and it seems the system is stuck at that cpu 
frequency. This is confirmed with
    kstat -m cpu_info -s current_clock_Hz

If I unplug the power supply, the cpu frequency drops to 800MHz. When I 
plug the power supply back in, the frequency goes up to 2001Mhz and 
gradually goes down to 800MHz again. Frequencies in all steps are 
confirmed with
     kstat -m cpu_info -s current_clock_Hz


Antonello
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