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Old 05-14-2005, 12:20 AM   #1
Adrohak
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Registered: Jun 2004
Location: Florida
Distribution: Gentoo
Posts: 148

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XMMS: alsa_get_mixer(): Attaching to mixer hw:0 failed: Permission denied


When I run XMMS as a user, I get this error:
Code:
** WARNING **: alsa_get_mixer(): Attaching to mixer hw:0 failed: Permission denied
And I cannot access my sound-card. I can play it as root, so it must be a permissions problem, but how do I change the permissions on "hw:0?"
 
Old 05-14-2005, 12:34 AM   #2
Adrohak
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Registered: Jun 2004
Location: Florida
Distribution: Gentoo
Posts: 148

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I just noticed that when I press play as a normal user, I get this:
Code:
ALSA lib confmisc.c:550:(snd_determine_driver) could not open control for card 0
ALSA lib conf.c:3463:(_snd_config_evaluate) function snd_func_card_driver returned error: Permission denied
ALSA lib confmisc.c:387:(snd_func_concat) error evaluating strings
ALSA lib conf.c:3463:(_snd_config_evaluate) function snd_func_concat returned error: Permission denied
ALSA lib confmisc.c:945:(snd_func_refer) error evaluating name
ALSA lib conf.c:3463:(_snd_config_evaluate) function snd_func_refer returned error: Permission denied
ALSA lib conf.c:3932:(snd_config_expand) Evaluate error: Permission denied
ALSA lib pcm.c:2068:(snd_pcm_open_noupdate) Unknown PCM default

** WARNING **: alsa_setup(): Failed to open pcm device (default): Permission denied
xmms-mad-Message: failed to open audio output: ALSA 1.2.10 output plugin
Any ideas?
 
Old 05-14-2005, 12:38 AM   #3
Adrohak
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Registered: Jun 2004
Location: Florida
Distribution: Gentoo
Posts: 148

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Also just noticed that when I ran the chmod step in the Alsa set-up guide for ca0106, I got this:
Code:
root : /usr/src/alsa > chmod a+rw /dev/dsp /dev/mixer /dev/sequencer /dev/midi
chmod: cannot access `/dev/dsp': No such file or directory
chmod: cannot access `/dev/mixer': No such file or directory
chmod: cannot access `/dev/sequencer': No such file or directory
chmod: cannot access `/dev/midi': No such file or directory
 
Old 06-24-2010, 03:10 PM   #4
ermeyers
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Registered: Oct 2009
Location: Halifax, PA
Distribution: CentOS, Ubuntu
Posts: 12

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Post SOLVED: xmms and gnome-volume-control PERMISSIONS

SOLUTION:
Code:
chmod -R a+rw /dev/{audio,dsp,midi,mixer,snd}
fixed two related problems on a CentOS release 4.8 machine.

xmms error:
Code:
WARNING **: alsa_get_mixer(): Attaching to mixer hw:0 failed: Permission denied"
gnome-volume-control error:
Code:
Sorry, no mixer elements and/or devices found
 
  


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