From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomas Pospisek Subject: 100.0% power usage of Device Audio codec (HDA) on wake Date: Fri, 16 Nov 2012 15:23:06 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from brisi.sourcepole.ch (brisi.sourcepole.ch [5.9.57.43]) by alsa0.perex.cz (Postfix) with ESMTP id 421BB26260F for ; Fri, 16 Nov 2012 15:23:14 +0100 (CET) Received: from brisi-br ([192.168.138.1] helo=sourcepole.ch) by vilan-mail with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1TZMp5-0006y8-7J for Alsa-devel@alsa-project.org; Fri, 16 Nov 2012 15:23:13 +0100 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Hello, The kernel of the upcoming Debian release and some recent kernels of Ubuntu seem to be suffering from HDA running at full force upon wakeup and producing a lot of heat (keeping the fan spinning loudly). The bug tracking can be found here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/877560 is there anything known about this problem? What the root of the problem is? How to solve it? Are there patches? Are there kernels that have fixed the problem? Are there workarounds? The problem seems to be impacting quite a few users. *t