different user causes 'no such device'

different user causes 'no such device'

[william estrada]

Hi guys,

   I have what seams like a interesting problem.  I have written an ALSA app
to record wav files and it runs while I am logged in an terminal as the
logged in Gnome user or root.  But when I su to another user, it can't
find the default sound card.

   I am running FC6.  I tried changing own of /dev/dsp to 'nobody', that did
not work.

   Anyone know of this problem and a fix for it.

   Thanks for your time.

-- 
William Estrada
MrUmunhum@popdial.com
Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net )
Ymessenger: MrUmunhum

> MSGrec - Version 1.1, Mt-Umunhum-Wireless.net
> WavMSG: Paused: enter 'q' to stop, <ENTER> to start.
> ALSA lib confmisc.c:848:(snd_func_card_driver) cannot find card '0'
> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device
> ALSA lib confmisc.c:397:(snd_func_concat) error evaluating strings
> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_concat returned error: No such device
> ALSA lib confmisc.c:1248:(snd_func_refer) error evaluating name
> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_refer returned error: No such device
> ALSA lib conf.c:3972:(snd_config_expand) Evaluate error: No such device
> ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM default

Re: different user causes 'no such device'

[william estrada]

Thanks, I will try this.

William Estrada
MrUmunhum@popdial.com
Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net )
Ymessenger: MrUmunhum



Takashi Iwai wrote:
> At Wed, 03 Oct 2007 12:55:27 -0700,
> william estrada wrote:
>> Hi guys,
>>
>>    I have what seams like a interesting problem.  I have written an ALSA app
>> to record wav files and it runs while I am logged in an terminal as the
>> logged in Gnome user or root.  But when I su to another user, it can't
>> find the default sound card.
>>
>>    I am running FC6.  I tried changing own of /dev/dsp to 'nobody', that did
>> not work.
>>
>>    Anyone know of this problem and a fix for it.
>>
>>    Thanks for your time.
>>
>> -- 
>> William Estrada
>> MrUmunhum@popdial.com
>> Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net )
>> Ymessenger: MrUmunhum
>>
>>> MSGrec - Version 1.1, Mt-Umunhum-Wireless.net
>>> WavMSG: Paused: enter 'q' to stop, <ENTER> to start.
>>> ALSA lib confmisc.c:848:(snd_func_card_driver) cannot find card '0'
>>> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device
>>> ALSA lib confmisc.c:397:(snd_func_concat) error evaluating strings
>>> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_concat returned error: No such device
>>> ALSA lib confmisc.c:1248:(snd_func_refer) error evaluating name
>>> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_refer returned error: No such device
>>> ALSA lib conf.c:3972:(snd_config_expand) Evaluate error: No such device
>>> ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM default
> 
> ALSA-native apps access only ALSA device files, usually /dev/snd/*,
> not /dev/dsp*, those for OSS.  In this case, it should be
> /dev/snd/controlC* files.  Check the premission of these files.
> 
> 
> Takashi
> 

Re: different user causes 'no such device'

[william estrada]

Thanks, I did a 'chmod -R 666 /dev/snd/' and it worked.

Now how do I make the hot plugged USB sound device use these setting??

Thanks for your time.

William Estrada
MrUmunhum@popdial.com
Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net )
Ymessenger: MrUmunhum



Takashi Iwai wrote:
> At Wed, 03 Oct 2007 12:55:27 -0700,
> william estrada wrote:
>> Hi guys,
>>
>>    I have what seams like a interesting problem.  I have written an ALSA app
>> to record wav files and it runs while I am logged in an terminal as the
>> logged in Gnome user or root.  But when I su to another user, it can't
>> find the default sound card.
>>
>>    I am running FC6.  I tried changing own of /dev/dsp to 'nobody', that did
>> not work.
>>
>>    Anyone know of this problem and a fix for it.
>>
>>    Thanks for your time.
>>
>> -- 
>> William Estrada
>> MrUmunhum@popdial.com
>> Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net )
>> Ymessenger: MrUmunhum
>>
>>> MSGrec - Version 1.1, Mt-Umunhum-Wireless.net
>>> WavMSG: Paused: enter 'q' to stop, <ENTER> to start.
>>> ALSA lib confmisc.c:848:(snd_func_card_driver) cannot find card '0'
>>> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device
>>> ALSA lib confmisc.c:397:(snd_func_concat) error evaluating strings
>>> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_concat returned error: No such device
>>> ALSA lib confmisc.c:1248:(snd_func_refer) error evaluating name
>>> ALSA lib conf.c:3500:(_snd_config_evaluate) function snd_func_refer returned error: No such device
>>> ALSA lib conf.c:3972:(snd_config_expand) Evaluate error: No such device
>>> ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM default
> 
> ALSA-native apps access only ALSA device files, usually /dev/snd/*,
> not /dev/dsp*, those for OSS.  In this case, it should be
> /dev/snd/controlC* files.  Check the premission of these files.
> 
> 
> Takashi
> 

Re: different user causes 'no such device'

[Takashi Iwai]

At Tue, 09 Oct 2007 09:27:04 -0700,
william estrada wrote:
> 
> Thanks, I did a 'chmod -R 666 /dev/snd/' and it worked.
> 
> Now how do I make the hot plugged USB sound device use these setting??

Usually it's done via udev.  But, how to set up depends pretty much on
the distro and the version you are using...


Takashi