linux-kernel - Re: [Alsa-user] another in kernel alsa update that breaks backward compatibilty?

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Date:	Wed, 09 Aug 2006 18:13:13 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Gene Heskett <gene.heskett@...izon.net>
Cc:	linux-kernel@...r.kernel.org, alsa-user@...ts.sourceforge.net,
	Sergei Steshenko <steshenko_sergei@...t.ru>
Subject: Re: [Alsa-user] another in kernel alsa update that breaks backward compatibilty?

At Wed, 09 Aug 2006 12:07:26 -0400,
Gene Heskett wrote:
> 
> On Wednesday 09 August 2006 11:46, Sergei Steshenko wrote:
> >On Wed, 09 Aug 2006 11:40:02 -0400
> >
> >Gene Heskett <gene.heskett@...izon.net> wrote:
> >> Greetings;
> >>
> >> The old fart is back again. :)
> >>
> >> I've just done a divide and conquer on kernel versions, and have found
> >> that while I DO have a kde audio signon for kernels 2.6.18-rc1-rc3-rc4,
> >> I do not have any other functioning audio, including the kde sound
> >> effects I normally get.  xmms and tvtime are mute, as are the firefox
> >> plugins to play videos from the network. 2.6.17.8 and below works great
> >> yet.
> >>
> >> So whats the fix?
> >
> >Demand stable ABI.
> 
> It does not appear to be so.  And ATM booted to 18-rc1, I didn't see an 
> error message when rc.local made a call of "[root@...ote gene]# alsactl 
> restore
> alsactl: set_control:894: warning: name mismatch (Mic Boost (+20dB)/Mic 
> Boost (+20dB) Switch) for control #45
> alsactl: set_control:896: warning: index mismatch (0/0) for control #45
> alsactl: set_control:898: failed to obtain info for control #45 (Operation 
> not permitted)
> [root@...ote gene]#

This kind of problems can be fixed by calling "alsactl restore" with
-F option.  The warnings may be still there but the values are handled
better.

The behavior with -F could be default, but it's kept so just for the
compatibility reason.


Takashi
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