Hi Igor,

Thanks so much for this!

U-DA-MAN!


Igor Wojnicki wrote:
> Guys I found it!!! Here is the solution!
> 
> 1st the lucid daily build (28.02.10) doesn't perform better than karmic, but 
> it gave me some clues.
> When it logged in (the daily build) as ubuntu I started rythmbox to play.
> I added another user aa.
> I switched to aa, and... the music stopped playing :) 
> then I started rhtythmox as aa, it plays nice.
> Swithed back to ubuntu and.... bummer, aa music keeps playing....
> So I added another user bb and repeated the procedure but swichinch between 
> aa and bb. In either case whichever user starts the music first it gets 
> access to the audio device and it's not willing to give it beack upon 
> switching.
> Why than ubuntu user behaves differently, giving back access to the audio 
> device?
> I checked permissions: System->User Settings->Advanced->User Priviledges.
> It turns out that by default ubuntu DOES NOT have 'Use audio devices checked' 
> hmmm interesting.
> So I unchecked this option for both aa and bb users. Guess what It started 
> working!
> 
> So I went back to karmic to investigate the user privileges there. ANd
> guess what, by default a desktop user has 'Use audio device' checked. So
> I unchecked it and... sound upon user switching started to work :)
> 
> Bottom line. If you want to have a user, which currently uses the
> display, to have access to the sound device with all the benefits from
> sound muting upon user switch, you need to uncheck 'Use audio devices'
> privileges for this user. As a matter of fact I unchecked it for all my
> users.
> 
> These privileges are very confusing then.
> I guess their proper interpretation is that if:
> - checked: the user locks the audio device as long as he wants, no sound 
> switching upon user switching,
> - unchecked: the user which currently uses the display has access to the 
> audio device, sound switching takes place upon user switching.
> 
> Ant the last word. I think it is very sad what happens here. None of the
> developers/packagers could help the community with this problem. But the
> solution was there! It seems that this is a kind of undocumented feature
> nobody knows about. Isn't there something wrong with software/package
> care at ubuntu then?
> 
> Anyway, have fun with your audio now!
>

-- 
[Karmic]&[Lucid] Only one user has sound; no hw shows in Sound Preferences
https://bugs.launchpad.net/bugs/433654
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