From: "Thomas Bächler" <thomas@archlinux.org>
To: Christian Lamparter <chunkeey@googlemail.com>
Cc: "Richard Schütz" <r.schtz@t-online.de>, linux-wireless@vger.kernel.org
Subject: Re: ath9k prevents CPU from entering C4 state (kernel 2.6.37 regression)
Date: Sun, 23 Jan 2011 00:49:33 +0100 [thread overview]
Message-ID: <4D3B6D0D.6070002@archlinux.org> (raw)
In-Reply-To: <201101222352.42913.chunkeey@googlemail.com>
[-- Attachment #1: Type: text/plain, Size: 715 bytes --]
Am 22.01.2011 23:52, schrieb Christian Lamparter:
> On Saturday 22 January 2011 21:38:47 Richard Schütz wrote:
>> I noticed that from kernel 2.6.37 on (i've tested 2.6.38-rc2, too) ath9k
>> prevents my CPU (Intel Atom N450) from entering the C4 power state. It
>> only goes down to C2 (there's no C3) instead. In 2.6.36(.3) everything
>> is still fine. The CPU will only go down to C4 with 2.6.37 when the
>> wireless interface is brought down.
>
> "ath9k: Fix a DMA latency issue for Intel Pinetrail platforms."
> http://www.spinics.net/lists/linux-wireless/msg58264.html
I experience the same problem, and I do not have a Pinetrail. I run
Intel Core i5-520M (Arrandale) with an AR9280 Rev 2.
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 262 bytes --]
prev parent reply other threads:[~2011-01-22 23:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-22 20:38 ath9k prevents CPU from entering C4 state (kernel 2.6.37 regression) Richard Schütz
2011-01-22 22:52 ` Christian Lamparter
2011-01-22 23:49 ` Thomas Bächler [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D3B6D0D.6070002@archlinux.org \
--to=thomas@archlinux.org \
--cc=chunkeey@googlemail.com \
--cc=linux-wireless@vger.kernel.org \
--cc=r.schtz@t-online.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.