From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756069AbbAFUj2 (ORCPT ); Tue, 6 Jan 2015 15:39:28 -0500 Received: from filtteri2.pp.htv.fi ([213.243.153.185]:54819 "EHLO filtteri2.pp.htv.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750995AbbAFUj1 (ORCPT ); Tue, 6 Jan 2015 15:39:27 -0500 Date: Tue, 6 Jan 2015 22:39:18 +0200 From: Aaro Koskinen To: Pavel Machek Cc: Felipe Balbi , pali.rohar@gmail.com, sre@debian.org, sre@ring0.de, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, ivo.g.dimitrov.75@gmail.com Subject: Re: 3.19 on Nokia n900: audio quality awful Message-ID: <20150106203918.GI30544@fuloong-minipc.musicnaut.iki.fi> References: <20150106170433.GA5408@amd> <20150106172545.GK6502@saruman> <20150106175115.GA19487@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150106175115.GA19487@amd> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Tue, Jan 06, 2015 at 06:51:15PM +0100, Pavel Machek wrote: > On Tue 2015-01-06 11:25:45, Felipe Balbi wrote: > > On Tue, Jan 06, 2015 at 06:04:33PM +0100, Pavel Machek wrote: > > > In 3.18, sound is nice and clear. > > > > > > In 3.19, sound is unusable. It produces nasty tone when it should be > > > quiet, and there's at least as much noise as is sound. > > > > > > Unfortunately, list of mixers also changed (and there's cca 120 > > > settings), but a) it does not work with the old list and b) nothing I > > > could figure out did make the sound usable. Some setting resulted in > > > even more noise. > > > > > > Any idea what could have caused it? > > > > $ git bisect start > > $ git bisect good v3.18 > > $ git bisect bad > > > > that'll help find what caused it. > > Telling someone to do hard and time consuming job that probably will > not succeed, instead of actually providing help. Very very funny. No, that was actually really a good advice. You should try to bisect it. It doesn't take that long (I assume you are cross-compiling instead of doing native builds), also Linux maintainers are generally doing a very good job ensuring the tree is bisectable. I would do it myself, but so far I never have set up my N900 to play any audio and I don't have any reference points between "good" or "bad". A.