From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout06.t-online.de ([194.25.134.19]:48426 "EHLO mailout06.t-online.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750862Ab1AVVBw (ORCPT ); Sat, 22 Jan 2011 16:01:52 -0500 Message-ID: <4D3B4057.5000206@t-online.de> Date: Sat, 22 Jan 2011 21:38:47 +0100 From: =?ISO-8859-15?Q?Richard_Sch=FCtz?= MIME-Version: 1.0 To: linux-wireless@vger.kernel.org Subject: ath9k prevents CPU from entering C4 state (kernel 2.6.37 regression) Content-Type: text/plain; charset=ISO-8859-15; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: 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. used wireless device: 05:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) -- Regards, Richard Schütz