linux-kernel - Re: 3.19 on Nokia n900: audio quality awful

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Message-ID: <20150106202857.GB32308@saruman>
Date:	Tue, 6 Jan 2015 14:28:57 -0600
From:	Felipe Balbi <balbi@...com>
To:	Pavel Machek <pavel@....cz>
CC:	Felipe Balbi <balbi@...com>, <pali.rohar@...il.com>,
	<sre@...ian.org>, <sre@...g0.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <tony@...mide.com>,
	<khilman@...nel.org>, <aaro.koskinen@....fi>,
	<ivo.g.dimitrov.75@...il.com>
Subject: Re: 3.19 on Nokia n900: audio quality awful

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:
> > > Hi!
> > > 
> > > 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.

you're getting code for free, you're getting help for free. Not many
people have N900s lying around. Running a bisection is just politeness.

-- 
balbi

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