From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751801Ab2JGV1x (ORCPT ); Sun, 7 Oct 2012 17:27:53 -0400 Received: from mail-bk0-f46.google.com ([209.85.214.46]:49187 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751278Ab2JGV1s (ORCPT ); Sun, 7 Oct 2012 17:27:48 -0400 Message-ID: <5071F3CF.8070907@gmail.com> Date: Sun, 07 Oct 2012 23:27:43 +0200 From: Daniel Mack User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120911 Thunderbird/15.0.1 MIME-Version: 1.0 To: Helge Hafting CC: linux-kernel@vger.kernel.org, alsa-devel Subject: Re: 3.6.0 regression, distorted sound failure while using jack and hd-audio References: <20121007213452.08e29880@tenkende-august.homelinux.net> In-Reply-To: <20121007213452.08e29880@tenkende-august.homelinux.net> X-Enigmail-Version: 1.4.4 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (cc alsa-devel) On 07.10.2012 21:34, Helge Hafting wrote: > My sound setup works fine with 3.5.4, but have serious problems with 3.6.0 > > It is sound through jack that breaks, simply using "aplay" directly with the > alsa device works. > > When I use jack, my setup works fine with 3.5.4. But boot into 3.6.0, > and I get badly distorted sound as if using an extremely overdone reverb effect. > And jack reports tons of xruns, several per second. > > This can be worked around by going from 256 to 512 frames/period in the jack > settings. But that also double the latency, which makes keyboard playing less > pleasant. > > It is not a case of 256 frames/period being (almost) too extreme for the machine. With kernel 3.5.4, > I can use 128 frames/period and get mostly ok sound, with only an occational > xrun (and a correseponding pop in the sound). So I use 256 because that's solid. > But with 3.6.0, not even 256 is enough. And it is not an occational pop, but > awful distortion all the time. > > I don't really know what has changed from 3.5.4 to 3.6.0. The hd-audio driver? > Something in alsa? Or the scheduling? > > Machine: Dell precision M6600 laptop, 8GB, 2.2GHz quad-core i7. > Usually at 800MHz to save power, this is enough for making sound. > Kernels: 64-bit 3.5.4 or 3.6.0 > Distro: funtoo > > Audio according to lspci: > 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04) > > Please tell if there is anything I should try. I can test other kernel versions > or try patches. > > Helge Hafting > -- > 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/ >