Re: 2.6.31 regression: iwlagn power_level no longer works

["Gábor Stefanik" <netrolller.3d@gmail.com>]

On Tue, Sep 1, 2009 at 11:26 PM, Andy Lutomirski<luto@mit.edu> wrote:
> On 2.6.30.5, I can echo 1 >/sys/class/net/wlan0/device/power_level, and the
> value changes to 1, my wakeup rate goes way down, and my power consumption
> (as measured by powertop) drops noticeably.
>
> On 2.6.31-rc7, I can still echo 1 to that file, but nothing happens, and the
> value I get if I 'cat power_level' remains at 0.
>
> My kernel configs are as identical as 'make oldconfig' knows how to make
> them.
>
> Any ideas?

Power saving has been disabled temporarily in recent versions, as it
caused too many problems. AFAIK either there is either a modparam to
re-enable it or you can re-enable it using iwconfig (it is simply off
by default). There was talk on the mailing list whether to use a
modparam or iwconfig - I don't remember what the outcome was.

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