[Mageia-dev] No sound after reboot.

Thu Dec 15 10:41:55 CET 2011

'Twas brillig, and Charles A Edwards at 15/12/11 02:02 did gyre and gimble:
+> 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.
+
+Yeah this is a solution but it only fixes audio and this problem affects
+way more than just audio... it's just that audio tends to be the first
+thing people notice :)
+
+So some follow-up questions for you:
+ 1) Is this a clean install?
+ 2) Did you upgrade from mga1?
+ 3) Are you using systemd?
+ 4) What is the output from "systemd-loginctl"
+ 5) Do you have a /etc/pam.d/system-auth.rpmnew?
+ 6) Have you properly fixed up system-auth.rpmnew to include the missing
+stuff?
+
+Cheers
+
+Col
+
+
+
+-- 
+
+Colin Guthrie
+colin(at)mageia.org
+http://colin.guthr.ie/
+
+Day Job:
+  Tribalogic Limited http://www.tribalogic.net/
+Open Source:
+  Mageia Contributor http://www.mageia.org/
+  PulseAudio Hacker http://www.pulseaudio.org/
+  Trac Hacker http://trac.edgewall.org/
+