Subject: Re: [BUG] no sound on ppc mac mini
From: john stultz <johnstul@us.ibm.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Johannes Berg <johannes@sipsolutions.net>,
       lkml <linux-kernel@vger.kernel.org>
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Date: Wed, 06 Sep 2006 11:53:38 -0700
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On Wed, 2006-09-06 at 14:13 +0200, Takashi Iwai wrote:
> At Tue, 05 Sep 2006 18:08:44 -0700,
> john stultz wrote:
> > 
> > On Wed, 2006-09-06 at 10:50 +1000, Benjamin Herrenschmidt wrote:
> > > > However...  ;)
> > > > 
> > > > It seems the new device doesn't have any volume control. I know the old
> > > > toonie driver used some form of softvol support, but "it just worked",
> > > > where as now I have no control over my system's audio volume.
> > > 
> > > It's a userland problem :) Your alsa config needs to enable the softvol
> > > plugin for it.
> > 
> > Yea. I figured. :( I've played around a bit w/ the .asoundrc file to
> > re-enable softvol (A similar hack was needed originally after the toonie
> > driver went in), but so far I've been unsuccessful.
> 
> I guess adding the following to /usr/share/alsa/cards/aliases.conf
> (or equivalent path depending on your distro) should suffice:
> 
> 	AppleOnbdAudio cards.PMacToonie

Thanks! I'll give that a whirl.

> > > > While not the most terrible of regressions, its a bit irritating (waking
> > > > to loud mail notifications, specifically :). Is this something that I
> > > > have to wait for an alsa userland update to fix, or is the new kernel
> > > > driver just not fully functional yet?
> > > 
> > > Part of the problem is that you can't anymore identify the type of codec
> > > based on the card name thus Alsa old mecanism of having a specific
> > > toonie config file that includes softvol doesn't work any more. The
> > > trick was bad in the first place though because you can have multiple
> > > different codecs anyway, so it didn't scale. (The old driver couldn't
> > > deal with it, but the new one can, though we haven't yet implemented
> > > support for any of the topaz digital codecs).
> > > 
> > > I remember a discussion with the Alsa folks where it was question to
> > > have Alsa userland automatically instanciate softvol if there is no
> > > volume provided by the driver, which is a better approach.
> > > 
> > > Takashi, was this ever implemented ? John, what is your Alsa userland
> > > version ?
> > 
> > 1.0.10-4ubuntu4
> 
> Could you try alsa-lib 1.0.12?  Then you'll have more bonus, not only
> the fixes for this softvol problem ;)

Unfortunately, as good as "more bonus" sounds, that will probably have
to wait until edgy comes out. :)

I appreciate the help and clarifications!
-john

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