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Date: Tue, 18 Feb 2014 13:32:44 +0200
Message-ID: <CANUX_P1TdHUXdauuB=dnShtg9PdMBCi=G3hn0gZ9m8F4b7o=jw@mail.gmail.com> (sfid-20140218_123251_050241_80B10207)
Subject: Re: Power saving features for iwl4965
From: Emmanuel Grumbach <egrumbach@gmail.com>
To: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Tino Keitel <tino.keitel@tikei.de>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	Pedro Francisco <pedrogfrancisco@gmail.com>
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Sender: linux-wireless-owner@vger.kernel.org

On Tue, Feb 18, 2014 at 12:57 PM, Stanislaw Gruszka <sgruszka@redhat.com> wrote:
> On Tue, Jun 11, 2013 at 08:51:20PM +0200, Tino Keitel wrote:
>> On Mon, Jun 03, 2013 at 16:18:05 +0200, Stanislaw Gruszka wrote:
>>
>> > Could you try this experimental patch?
>>
>> Hi,
>>
>> on top of kernel 3.9.4 (with TuxOnIce patch), iwconfig wlan0 power on
>> now saves more than 1 W on my ThinkPad X61s with iwl4965. I can finally
>> switch to a recent kernel. Thanks a lot.
>
> This patch stuck on mailing list far too long, I'll post it. Even if it
> crash firmware on 3945, power save is disabled by default.
>

I'd be very surprised if this patch helped. I guess you took the code
from iwlwifi in which we have enabled shadow registers for 7000
series. This HW is problematic but it doesn't exit on 4965.