Arch Linux

Lrouge

Member

Registered: 2010-06-15

Posts: 4

[SOLVED] ALSA and intel soundcard -> not detected, /dev/snd is empty

Hi, there was some topics mounths ago about this but I still can't figure out how to get my sound to work.
The main problem is that my soundcard is not detected and /dev/snd seems a little empty. I can't find the controlc0,1  files either....

Here is some useful info.

root@red red]# ls -l /sys/module/snd/holders/
total 0
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_hda_codec -> ../../snd_hda_codec
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_hda_intel -> ../../snd_hda_intel
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_hwdep -> ../../snd_hwdep
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_mixer_oss -> ../../snd_mixer_oss
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_pcm -> ../../snd_pcm
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_pcm_oss -> ../../snd_pcm_oss
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_seq -> ../../snd_seq
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_seq_device -> ../../snd_seq_device
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_seq_oss -> ../../snd_seq_oss
lrwxrwxrwx 1 root root 0 Jun 15 17:09 snd_timer -> ../../snd_timer

[root@red red]# lsmod | grep '^snd' | column -t
snd_seq_dummy       1439   0
snd_seq_oss         28928  0
snd_seq_midi_event  5412   1   snd_seq_oss
snd_seq             50530  5   snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device      5233   3   snd_seq_dummy,snd_seq_oss,snd_seq
snd_hda_intel       22514  0
snd_pcm_oss         39096  0
snd_hda_codec       68863  1   snd_hda_intel
snd_hwdep           6150   1   snd_hda_codec
snd_mixer_oss       16956  1   snd_pcm_oss
snd_pcm             70924  3   snd_hda_intel,snd_pcm_oss,snd_hda_codec
snd_timer           19684  2   snd_seq,snd_pcm
snd                 57209  10  snd_seq_oss,snd_seq,snd_seq_device,snd_hda_intel,snd_pcm_oss,snd_hda_codec,snd_hwdep,snd_mixer_oss,snd_pcm,snd_timer
snd_page_alloc      7161   2   snd_hda_intel,snd_pcm

[root@red red]# ls -l /dev/snd/
total 0
crw-rw---- 1 root audio 116, 3 Jun 15 17:00 seq
crw-rw---- 1 root audio 116, 2 Jun 15 17:00 timer

Souncard : Don't know the exact name, the "intel hd" one with an ICH7 bridge
Mobo : intel d945gclf (little atom board, not the newer ones)

Notice that line : snd_hda_intel       22514  0
Seems to me that the module is loaded, am I right?

EDIT: Sorry, maybe I am in the wrong section...

Last edited by Lrouge (2010-06-18 18:33:54)

soloport

Member

Registered: 2005-03-01

Posts: 442

Re: [SOLVED] ALSA and intel soundcard -> not detected, /dev/snd is empty

Looks pretty complete to me.  (OK, /dev/snd does look sparse.)  What do you see when you run alsamixer and press the F5 key?

$ sudo su -
# pacman -Sy alsa-utils
# alsamixer

Press F5 and check for:
* Master, Speaker, Front, Line, PCM volume down (if any)
* Any MM (bottom of vertical bar, signifies: line is muted) -- mute / un-mute with the 'm' key

Press Esc key to exit alsamixer + save changes.

Also, right after booting, run:  dmesg | grep -i codec
Look for something like "Realtek" or "ALC662" or similar.

Manually add codec driver: modprobe snd_hda_codec_realtek

ls -al /dev/snd
drwxr-xr-x  2 root root      60 May 28 19:35 by-path                                                                                                                                            
crw-rw----  1 root audio 116, 7 May 28 19:35 controlC0
crw-rw----  1 root audio 116, 6 May 28 19:35 hwC0D2
crw-rw----  1 root audio 116, 5 May 28 19:35 pcmC0D0c
crw-rw----  1 root audio 116, 4 May 28 19:35 pcmC0D0p
crw-rw----  1 root audio 116, 3 May 28 19:35 seq
crw-rw----  1 root audio 116, 2 May 28 19:35 timer

lsmod | grep snd
snd_hda_codec_realtek   179443  1 
snd_seq_dummy           1099  0 
snd_seq_oss            25304  0 
snd_seq_midi_event      4452  1 snd_seq_oss
snd_hda_intel          18921  0 
snd_seq                42628  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          4313  3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_hda_codec          56728  2 snd_hda_codec_realtek,snd_hda_intel
snd_pcm_oss            33693  0 
snd_hwdep               5102  1 snd_hda_codec
snd_pcm                57479  3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_mixer_oss          14810  1 snd_pcm_oss
snd_timer              16117  2 snd_seq,snd_pcm
snd                    43847  11 snd_hda_codec_realtek,snd_seq_oss,snd_hda_intel,snd_seq,snd_seq_device,snd_hda_codec,snd_pcm_oss,snd_hwdep,snd_pcm,snd_mixer_oss,snd_timer
soundcore               5007  1 snd
snd_page_alloc          5809  2 snd_hda_intel,snd_pcm

Lrouge

Member

Registered: 2010-06-15

Posts: 4

Re: [SOLVED] ALSA and intel soundcard -> not detected, /dev/snd is empty

Hi, thanks for looking at my problems!

First, here's the dmesg output ; I hope you will find it useful

dmesg | grep -i codec
hda-intel: No response from codec, disabling MSI: last cmd=0x200f0000
hda-intel: Codec #2 probe error; disabling it...
hda-intel: no codecs initialized

I also forgot to mention the problem about alsamixer (or amixer) : it just wont run...

This is the error output :

alsamixer 
cannot open mixer: No such file or directory

I also forgot to mention i'am on x86_64 arch and that it was working before in i686, so if the problem can't be figured out, i'll do another fresh install to get rid of the problem!

soloport

Member

Registered: 2005-03-01

Posts: 442

Re: [SOLVED] ALSA and intel soundcard -> not detected, /dev/snd is empty

Well then that's the end of the road for me, sorry to say.  Have two Intel d945gclf boards, both running i686 Arch.

Lrouge

Member

Registered: 2010-06-15

Posts: 4

Re: [SOLVED] ALSA and intel soundcard -> not detected, /dev/snd is empty

I guess I'll just have to roll back to i686 then
It was working fine...
EDIT: Strangely, I just switched back to i686 and my /dev/snd is fully populated again after a fresh install.

Last edited by Lrouge (2010-06-17 20:24:38)

soloport

Member

Registered: 2005-03-01

Posts: 442

Re: [SOLVED] ALSA and intel soundcard -> not detected, /dev/snd is empty

Strangely?  Strangely as in unexpected?  How could that be? ;-)  Could you mark [Solved]?