[Mageia-dev] No sound after reboot.

Charles A Edwards CAE at eslrahc.com
Thu Dec 15 03:02:40 CET 2011


On Wed, 14 Dec 2011 10:27:55 +0000
Colin Guthrie <mageia at colin.guthr.ie> wrote:

> > Sound card is c-media and is properly detected in both harddrake and
> > alsaconf and uses the snd_cmipci driver and is set to use
> > pulseaudio.
> > 
> > Driver and modules are loaded
> > 
> > [root at SuperSize ~]# lspcidrake -v |grep AUDIO
> > snd_cmipci      : C-Media Electronics Inc|CM8738 [MULTIMEDIA_AUDIO]
> > (vendor:13f6 device:0111 subv:584d subd:3731) (rev: 10)
> > [root at SuperSize ~]# lsmod |grep snd 
> > snd_cmipci             40460  0 
> > gameport               14963  1 snd_cmipci
> > snd_pcm                84041  1 snd_cmipci
> > snd_page_alloc         18101  1 snd_pcm
> > snd_opl3_lib           18620  1 snd_cmipci
> > snd_timer              28855  2 snd_pcm,snd_opl3_lib
> > snd_hwdep              13515  1 snd_opl3_lib
> > snd_mpu401_uart        13992  1 snd_cmipci
> > snd_rawmidi            29657  1 snd_mpu401_uart
> > snd_seq_device         14136  2 snd_opl3_lib,snd_rawmidi
> > snd                    70007  8
> > snd_cmipci,snd_pcm,snd_opl3_lib,snd_timer,snd_hwdep,snd_mpu401_uart,snd_rawmidi,snd_seq_device
> > soundcore              14491  1 snd
> > 
> > But the card is not detected by pulseaudio
> > Running PulseAudio Volumne Control:
> > Shows only for Dummy Output
> > Configuration:
> > Shows: No cards available for configuration  
> 
> Generally this relates to a permissions issue (although it can also
> indicate a problem with dbus)
> getfacl
> 1. cat /proc/asound/cards
> 2. getfacl /dev/snd/pcm*
> 3. sudo fuser -v /dev/snd/pcm*

[charles at SuperSize ~]$ cat /proc/asound/cards
 0 [CMI8768        ]: CMI8738-MC8 - C-Media CMI8768
                      C-Media CMI8768 at 0x9c00, irq 18

[charles at SuperSize ~]$ getfacl /dev/snd/pcm*
: Removing leading '/' from absolute path names
# file: dev/snd/pcmC0D0c
# owner: root
# group: audio
user::rw-
group::rw-
other::---

# file: dev/snd/pcmC0D0p
# owner: root
# group: audio
user::rw-
group::rw-
other::---

# file: dev/snd/pcmC0D1p
# owner: root
# group: audio
user::rw-
group::rw-
other::---

# file: dev/snd/pcmC0D2c
# owner: root
# group: audio
user::rw-
group::rw-
other::---

# file: dev/snd/pcmC0D2p
# owner: root
# group: audio
user::rw-
group::rw-
other::---

I do not use sudo so there is no output for the 3rd query but from #2
it would appear that it is indeed a permission issue as user charles
is not listed as having access.

I've worked around the issue (a band-aid only) by adding user charles to
the audio group and again have working sound.


    Charles


-- 
AUTHOR
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Mageia release 2 (Cauldron) for x86_64$
On SuperSize....http://www.eslrahc.com
Registered Linux user #182463
3.1.5-tmb-server-1.mga2 x86_64
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