Return-path: Received: from gerolde.archlinux.org ([66.211.214.132]:45067 "EHLO archlinux.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750840Ab1AVX5l (ORCPT ); Sat, 22 Jan 2011 18:57:41 -0500 Message-ID: <4D3B6D0D.6070002@archlinux.org> Date: Sun, 23 Jan 2011 00:49:33 +0100 From: =?ISO-8859-15?Q?Thomas_B=E4chler?= MIME-Version: 1.0 To: Christian Lamparter CC: =?ISO-8859-15?Q?Richard_Sch=FCtz?= , linux-wireless@vger.kernel.org Subject: Re: ath9k prevents CPU from entering C4 state (kernel 2.6.37 regression) References: <4D3B4057.5000206@t-online.de> <201101222352.42913.chunkeey@googlemail.com> In-Reply-To: <201101222352.42913.chunkeey@googlemail.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig75DAAE32130EB485389EDF5D" Sender: linux-wireless-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig75DAAE32130EB485389EDF5D Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable Am 22.01.2011 23:52, schrieb Christian Lamparter: > On Saturday 22 January 2011 21:38:47 Richard Sch=FCtz wrote: >> I noticed that from kernel 2.6.37 on (i've tested 2.6.38-rc2, too) ath= 9k=20 >> prevents my CPU (Intel Atom N450) from entering the C4 power state. It= =20 >> only goes down to C2 (there's no C3) instead. In 2.6.36(.3) everything= =20 >> is still fine. The CPU will only go down to C4 with 2.6.37 when the=20 >> wireless interface is brought down. >=20 > "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. --------------enig75DAAE32130EB485389EDF5D Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEAREIAAYFAk07bQ0ACgkQEda5KzHP/VD7TACgu8SzP19H92svXStIlcc2uQpM wroAoKhCyB0sYHZbXh+IH4/yIzvLZiHA =QZ92 -----END PGP SIGNATURE----- --------------enig75DAAE32130EB485389EDF5D--