From: "John W. Linville" <linville@tuxdriver.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
Marcel Holtmann <marcel@holtmann.org>,
Kalle Valo <kalle.valo@iki.fi>,
"Guy, Wey-Yi W" <wey-yi.w.guy@intel.com>,
Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: powersaving when interface is up but not associated
Date: Wed, 22 Apr 2009 16:44:08 -0400 [thread overview]
Message-ID: <20090422204408.GK3288@tuxdriver.com> (raw)
In-Reply-To: <1240431356.30082.18.camel@johannes.local>
On Wed, Apr 22, 2009 at 10:15:56PM +0200, Johannes Berg wrote:
> Hi!
>
> Just had this idea -- when our networking interfaces are UP, but not
> actually doing anything, the RF chains consume power. This is, often,
> the default state, since you'll have your wifi on due to NM wanting to
> find APs, but not associated, for example when on the road. Sure, you
> can manually turn it off, but...
>
> However, it doesn't seem necessary. When we are not associated to an AP,
> and there are no extra interfaces in mac80211 active like monitor
> interfaces, it seems that we could very well turn off the radio while
> not scanning. It would be entirely trivial for mac80211 to do this,
> probably a 20 line patch or so (need some bookkeeping about why radio is
> disabled so it's not just four lines).
Makes sense to me...
--
John W. Linville Someday the world will need a hero, and you
linville@tuxdriver.com might be all we have. Be ready.
next prev parent reply other threads:[~2009-04-22 20:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-22 20:15 powersaving when interface is up but not associated Johannes Berg
2009-04-22 20:44 ` John W. Linville [this message]
2009-04-23 8:00 ` Kalle Valo
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