Problem with alsamixer, amixer

Problem with alsamixer, amixer

[Miha Tomsic]

	Hello!

This is an old problem I reported a year or so ago. 

I have SBPCI 128 with ak4531 codec. The problem is that I can't set
capture to certain channels (the channels that are using capture route
CD, Line, PCM 1) if they are muted. Or if capture is already set, muting
those channels will switch capture off.

This is happening if I am using alsamixer or amixer with sset. If I am
using amixer with cset I can set anything I want. 

I guess the problem lies in the ak4531 and the way simple controls are
handled. I don't know enough about alsa internals so poking around the
sources of alsamixer, amixer and ak4531 didn't help me understand what
should I do to make it working.

What is the relation of sset to cset ? 

Can this be addressed generally or should there be a workaround for
ak4531?

Thanks and take care,

	Miha...







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Re: Problem with alsamixer, amixer

[Takashi Iwai]

At 10 Oct 2002 17:08:11 +0200,
Miha Tomsic wrote:
> 
> 	Hello!
> 
> This is an old problem I reported a year or so ago. 
> 
> I have SBPCI 128 with ak4531 codec. The problem is that I can't set
> capture to certain channels (the channels that are using capture route
> CD, Line, PCM 1) if they are muted. Or if capture is already set, muting
> those channels will switch capture off.
> 
> This is happening if I am using alsamixer or amixer with sset. If I am
> using amixer with cset I can set anything I want. 
> 
> I guess the problem lies in the ak4531 and the way simple controls are
> handled. I don't know enough about alsa internals so poking around the
> sources of alsamixer, amixer and ak4531 didn't help me understand what
> should I do to make it working.

can you change each one switch or volume value by the follwoing way?

- call "alsactl -f foo store"
- modify the file "foo"
- call "alsactl -f foo restore"

if it works, then the problem is alsamixer or alsa-lib.
the latest alsamixer can handle playback and capture separately, so
this problem should have been fixed.


Takashi


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Re: Problem with alsamixer, amixer

[Miha Tomsic]

	Hello Takashi!

On čet, 2002-10-10 at 17:18, Takashi Iwai wrote:
> can you change each one switch or volume value by the follwoing way?
> - call "alsactl -f foo store"
> - modify the file "foo"
> - call "alsactl -f foo restore"
> if it works, then the problem is alsamixer or alsa-lib.
> the latest alsamixer can handle playback and capture separately, so
> this problem should have been fixed.

Yes, this works too. Only the simple controls (or simple mixer elements)
don't work correctly.

And I forgot to mention that I am using alsa-*-0.9.0rc3.

Should I get the CVS version? Is the new CVS compatible with rc3? I am
not following the discussions too closely, but will it break rc3 native
ALSA apps? I've seen that there are patches for jack to make it work
with new CVS alsa.

Is rc4 comming any time soon?

Thanks and take care,

	Miha...



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Re: Problem with alsamixer, amixer

[Takashi Iwai]

Hi,

At 10 Oct 2002 17:34:36 +0200,
Miha Tomsic wrote:
> 
> On čet, 2002-10-10 at 17:18, Takashi Iwai wrote:
> > can you change each one switch or volume value by the follwoing way?
> > - call "alsactl -f foo store"
> > - modify the file "foo"
> > - call "alsactl -f foo restore"
> > if it works, then the problem is alsamixer or alsa-lib.
> > the latest alsamixer can handle playback and capture separately, so
> > this problem should have been fixed.
> 
> Yes, this works too. Only the simple controls (or simple mixer elements)
> don't work correctly.

the simple mixer controls via amixer cannot distinguish the switch
direction for playback and capture.  it's a feature :)
try to cset/cget instead.

> And I forgot to mention that I am using alsa-*-0.9.0rc3.
> 
> Should I get the CVS version? Is the new CVS compatible with rc3?

yes, the binary compatibility must be kept.


Takashi


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