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c.f. bug 424647
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To: gentoo-user@g.o
From: Bob Sanders <rsanders@...>
Subject: Re: Sound Card Testing and Verification
Date: Mon, 6 Dec 2004 09:46:17 -0800
> 
> # lspci | grep audio
> 0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801AA AC'97
> Audio (rev 02)
> 
> But if I try to play any audio file, I get no sound! in mplayer it
> gives me an error box saying: "audio_setup: Can't open audio device
> /dev/dsp: Permission denied"
> 
> I'm using fluxbox and I don't know how to increase/decrease the volume!!
>

What session manager are you using?  The error described, typically means
that upon login the audio devices were not reassigned to the user.  If
you do an ls -l /dev and ls -l /dev/snd, the owner should be the logged in
user.  I know Entrance does not properly re-assign the ownership. 

The other possibility is the user is not in the audio group of /etc/group

Bob
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References:
Sound Card Testing and Verification
-- Yousef Raffah
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Updated May 04, 2012

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