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Re: ?? user in group audio -- but only root can play sound

udev may be having adverse impacts on abilities to play sounds from certain cards after reboot. Anyone interested may find sound devices in black listed category they don't want to have black listed. Correcting such black listing for now is beyond my capability since I haven't done enough with udev to be safe working with ityet. 

On Fri, 22 Jan 2016, Gregor Zattler wrote:


Date: Thu, 21 Jan 2016 18:03:52
From: Gregor Zattler <telegraph@gmx.net>
To: debian-user <debian-user@lists.debian.org>
Subject: Re: ?? user in group audio -- but only root can play sound
Resent-Date: Thu, 21 Jan 2016 23:04:43 +0000 (UTC)
Resent-From: debian-user@lists.debian.org

Hi Floris, debian users,
* Floris <jkfloris@dds.nl> [21. Jan. 2016]:

Op Thu, 21 Jan 2016 20:32:21 +0100 schreef Gregor Zattler
<telegraph@gmx.net>:


since a few days my normal user, which is in group sound, cannot
play sound (aplay works but no sound) while root can.


[...]

You are right, the right permissions are set.

Do you have an .asoundrc file in your home directory?

If you have one remove it.
and try aplay again

If you doesn't have one create one with:

pcm.pulse {
   type pulse
}

ctl.pulse {
   type pulse
}

and try
aplay -Dpulse foo.wav


There was no ~/.asoundrc.  I filled one with your example and
tried aplay -D pulse ...  --> no sound


success,


this would be fine :-)



Sorry, now I see you have multiple sound cards.


My fault I should have mentioned it, sorry:  That's it!


use aplay -l to show all your cards


mine is

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC3232 Analog [ALC3232 Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
 Subdevices: 1/1
 Subdevice #0: subdevice #0


Then test them with:
$ mplayer -ao alsa:device=hw=0.0 some-music-file
and change 0.0 to your cards. The first 0 is the card number, the second the
device number.
So I can test 0.0, 0.2, 0.3 and 3.0 and replace some-music-file with your
own music.
 / and * controls the volume

Is there sound on any of the devices?


The analog device is the very first.

mplayer  -ao alsa:device=hw=0.0 <file>

plays sound and I hear it.

I know there are several soundcards.  Therefore I had played with
aplay-l and aplay -D but did not manage to select the device with
aplay -D 0.0.

Since 2015-12-11 my /etc/modprobe/alsa-base.conf ist:
# PCH
options snd-hda-intel index=0 model=auto vid=8086 pid=9c20
# HDMI
options snd-hda-intel index=1 model=auto vid=8086 pid=0a0c

this is (if I remember correctly) from Arch wiki and should
provide a numbering of sound devices such that the analog device
becomes default (first one).  Since then I could hear music, hear
sound from movies but only till a week ago.


If I delete this file and reboot, the numbering of devices is:

**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC3232 Analog [ALC3232 Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0

Now mplayer -ao alsa:device=hw=1.0 works but aplay wav still does
not, mplayer does not without the command line switch and
interestingly mpd still works.

How to tell linux that the analog device is the default device?
(I'll come back to this mailing list when I actually want to hear
sound through the HDMI device).



Thanks a lot!  This at least gives an explanation!

Ciao; Gregor




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