[LAU] Audigy soundcard silent after upgrade to Ubuntu Studio

frank pirrone frankpirrone at gmail.com
Tue Nov 3 15:20:19 EST 2009

David Morrell wrote:
> Here's the next instalment. First, the background.
> The problem was that a Creative Audigy2 card that had worked perfectly 
> in Ubuntu 8.04 suddenly went silent after an upgrade to Ubuntu Studio 
> 9.04. It still worked perfectly in Windows on the same dual boot machine.
> <snip>
> I've done a bit more testing and reported it on the Ubuntu bug reporting 
> system as follows. The bug is at;
> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/406356
> To reproduce the bug then repair the damage, do the following.
> Delete /var/lib/asound.state (to mimic a fresh install, when it has not 
> yet been created)
> Run
>     alsactl init
> The sound card is probed. Alsactl reports;
>     Unknown hardware: "Audigy2" "SigmaTel STAC9750,51" "AC97a:83847650" 
> "" ""
>     Hardware is initialized using a guess method
> A version of asound.state is created that lacks (at least) a master 
> volume mute switch. There is no sound output.
> Restore the previously good asound.state, run 'alsactl restore' and the 
> card works again.
> Does this mean that something (I don't know what) needs to be improved 
> so it can recognise this card (Audigy 2 Value [SB0400)?

My understanding was that the functionality/setup of the Audigy driver 
was buggered in the 9.04 J.J. kernel module.  Once you've fiddled with 
alsamixer, and created a working /var/lib/alsa/asound.state file it 
should be fine.  I believe this is fixed in the 9.10 K.K. version.


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