Re: 3.19 on Nokia n900: audio quality awful

Aaro Koskinen
2015-01-06T20:39:28Z

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.