Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757221Ab0DOVTm (ORCPT ); Thu, 15 Apr 2010 17:19:42 -0400 Received: from mailservice.tudelft.nl ([130.161.131.5]:50976 "EHLO mailservice.tudelft.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756800Ab0DOVTl (ORCPT ); Thu, 15 Apr 2010 17:19:41 -0400 X-Spam-Flag: NO X-Spam-Score: -22.589 Message-ID: <4BC782E5.7070900@tremplin-utc.net> Date: Thu, 15 Apr 2010 23:19:33 +0200 From: =?UTF-8?B?w4lyaWMgUGllbA==?= User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.21) Gecko/20090319 Mandriva/2.0.0.21-1mdv2009.1 (2009.1) Thunderbird/2.0.0.21 Mnenhy/0.7.6.666 MIME-Version: 1.0 To: Takashi Iwai CC: Jaroslav Kysela , "Rafael J. Wysocki" , Linux Kernel Mailing List , alsa-devel@alsa-project.org, Frank Griffin Subject: Re: [REGRESSION bisected] Sound goes too fast due to commit 7b3a177b0 References: <4BC4E812.6050602@tremplin-utc.net> <4BC5A566.8060106@tremplin-utc.net> In-Reply-To: X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1407 Lines: 32 Op 14-04-10 18:01, Takashi Iwai schreef: : >> >> I don't fully grasp the meaning of bdl_pos_adj, so I don't know if it's >> a bug to not play correctly when forcing it to 0. Is it? > > It might be that this was for reducing the load by position > correction mechanism. You might see the hd-audio kernel thread in a > high CPU usage. This might be fixed also by position_fix=1, though. Yes, I had added this option after a regression in the previous kernel which causes the hd-audio thread to take 50% of a CPU. Eventually, it was fixed and not needed anymore. So I guess in the case of my laptop, this is not really a regression, because everything is fine with the default values. In the case of Frank, this looks more like a regression, or at least a bug to solve, because this happens with the default options. However, this report should be taken with care, because this happens on a 2.6.33.2 kernel made by Mandriva, containing many alsa patches of 2.6.34. Frank, how possible would it be to test a 2.6.34-rc4 kernel from Linus? If this bug is confirmed, Takashi, do you know any way to choose automatically position_fix=1 when needed? See you, Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/