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dead_parrot
n00b
Joined: 26 Mar 2012
Posts: 12
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
| Code: |
[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: 7020
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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: 12
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
Advocate
Joined: 19 Oct 2007
Posts: 2035
Location: Between the keyboard and the chair
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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
_________________
In theory there are no differences between theory and practice. In practice, there are.
Don't try to understand my posts. Immanuel Kant never did, he thinks that only music and laughter do not have to mean anything. |
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dead_parrot
n00b
Joined: 26 Mar 2012
Posts: 12
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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