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dead_parrot
n00b
Joined: 26 Mar 2012
Posts: 27
Location: /EU/PL
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 Posted: Wed Aug 15, 2012 7:44 pm Post subject: Failed to initialize audio driver 'alsa' -sometimes |
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Hi,
I have a strange problem with an access to alsa output which appears sometimes when logged on as a second user. It is the following sequence that reproduces the problem:
1. user 1 is logged on
2. user 1 logs off
3. user 2 logs in
4. user 2 have a sound problem.
Skype and system sounds work fine, but web browsers and mplayer don't. Mplayer gives the following message
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[AO_ALSA] alsa-lib: pcm_dmix.c:985:(snd_pcm_dmix_open) unable to create IPC semaphore
[AO_ALSA] Playback open error: Permission denied
Failed to initialize audio driver 'alsa'
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If I run mplayer as a root it works.
I would be very thankful for any help. |
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PaulBredbury
Watchman
Joined: 14 Jul 2005
Posts: 7310
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| Posted: Wed Aug 15, 2012 9:13 pm Post subject: |
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See if PAM is interfering:
find /etc/security -type f | xargs grep sound |
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dead_parrot
n00b
Joined: 26 Mar 2012
Posts: 27
Location: /EU/PL
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| Posted: Thu Aug 16, 2012 6:48 pm Post subject: |
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| Code: |
find /etc/security -type f | xargs grep sound
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gives
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/etc/security/group.conf:# floppy, play, sound
/etc/security/group.conf:# the sound and play group) after work hours.
/etc/security/group.conf:#xsh; tty* ;sword;!Wk0900-1800;sound, play
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nothing special, I guess. |
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aCOSwt
Bodhisattva
Joined: 19 Oct 2007
Posts: 2537
Location: Hilbert space
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| Posted: Thu Aug 16, 2012 7:18 pm Post subject: Re: Failed to initialize audio driver 'alsa' -sometimes |
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| dead_parrot wrote: |
| Code: |
[AO_ALSA] alsa-lib: pcm_dmix.c:985:(snd_pcm_dmix_open) unable to create IPC semaphore |
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Please post the output of :
1/ Before user1 logs out
2/ After user2 logs in
_________________
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dead_parrot
n00b
Joined: 26 Mar 2012
Posts: 27
Location: /EU/PL
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| Posted: Wed Aug 22, 2012 6:40 pm Post subject: |
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| Thanks for the answer. It's strange, but now I can't reproduce this error. If it's not gone, I will return with the feedback ASAP. |
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