Re: Sound

[Federico Grau <grauf@rfa.org>]

chmod 660 /dev/snd/*

When you did a "chgrp audio /dev/snd/*", that corrected the group membership
issue with the users.  However, if you see the permission bits:
    crw------- 1 root root 116,  0 Feb  8 11:21 controlC0
    user  group  other
    rw-   ---    ---
Only the user has read and write permissions.  The chmod (change mode) command
up top should correct that and give you something like
    crw-rw---- 1 root root 116,  0 Feb  8 11:21 controlC0
    user  group  other
    rw-   rw-    ---

"man 1 chmod" for more details.

best to you,
donfede


On Thu, Feb 08, 2007 at 08:29:40PM -0500, John Dey wrote:
> Hi Frederico,
> 
> Thanks for your response.  I get the following:
> 
> [robo9@robo9 dev]$ ls -l /dev/snd
> total 0
> crw------- 1 root root 116,  0 Feb  8 11:21 controlC0
> crw------- 1 root root 116, 16 Feb  8 11:21 pcmC0D0p
> crw------- 1 root root 116,  1 Feb  8 11:21 seq
> crw------- 1 root root 116, 33 Feb  8 11:21 timer
> 
> which confirms my suspicion.  I changed group to audio and added user  
> to that group.  I changed permission.  But still no luck.  I get the  
> following from aplay:
> 
> [robo9@robo9 Desktop]$ aplay BWV535.wav
> ALSA lib confmisc.c:672:(snd_func_card_driver) cannot find card '0'
> ALSA lib conf.c:3492:(_snd_config_evaluate) function  
> snd_func_card_driver returned error: No such device
> ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
> ALSA lib conf.c:3492:(_snd_config_evaluate) function snd_func_concat  
> returned error: No such device
> ALSA lib confmisc.c:1072:(snd_func_refer) error evaluating name
> ALSA lib conf.c:3492:(_snd_config_evaluate) function snd_func_refer  
> returned error: No such device
> ALSA lib conf.c:3961:(snd_config_expand) Evaluate error: No such device
> ALSA lib pcm.c:2099:(snd_pcm_open_noupdate) Unknown PCM default
> aplay: main:547: audio open error: No such device
> 
> Any further suggestions would be appreciated.  Thanks.
> 
> John
> 
> John
> On Feb 8, 2007, at 5:30 PM, Federico Grau wrote:
> 
> >*** off list
> >
> >Hello John,
> >
> >Check the required permissions with this command:
> >    ls -la /dev/snd
> >
> >On my system I have device file permissions such as:
> >    crw-rw----   1 root audio 116,  24 Sep  9  2005 pcmC0D0c
> >
> >Which means my non-root users need to be in the "audio" group in order  
> >to use
> >the audio devices.
> >
> >donfede
> >
> >
> >On Thu, Feb 08, 2007 at 03:24:40PM -0500, John Dey wrote:
> >>Hello Members,
> >>
> >>I have posted here on the same topic but haven't received any
> >>responses.  I do have some new information that makes me believe that
> >>alsa is working just fine on my PS3 using YDL 5 but needs some
> >>adjustments to permissions on file/sockets.  aplay and speaker-test
> >>works as root but not as user.  What changes do I need to make so that
> >>I can run aplay at user level?  Thanks.
> >>
> >>John
> >>
> >>
> >>---------------------------------------------------------------------- 
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> >-- 
> >Federico Grau
> >Free Software Developer and Sysadmin
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-------------------------------------------------------------------------
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