Re: [LAD] [LAU] Audigy soundcard silent after upgrade to Ubuntu Studio

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.

David Morrell wrote:
> frank pirrone wrote:
>
>> Here's my /var/lib/alsa/asound.state file. You can try moving yours
>> aside by renaming it, and dropping this in to see if it makes any
>> difference. I have the Audigy2 card in this ArtistX/Ubuntu 9.10 Dell
>> Workstation, and it is fully functional.
>>
>
> Amazing! Eureka etc. Thanks very much indeed, Frank. I've put about 15
> hours into this problem and you've solved it. Now the question is, how
> did a bad asound.state file get created as a default during
> installation? Does anyone know where I should go to alert someone who
> can look at this?
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)?

-- 
David Morrell
Web site: www.davidmorrell.ozeweb.net (when I get it on air again :) 
<http://www.davidmorrell.ozeweb.net>
Email:     dsmorrell56@email-addr-hidden <mailto:dsmorrell56@email-addr-hidden>
Ph: 0408 842 955 / 03 6343 5131
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