Can't get sound to work - no /dev/dsp !!!

BashfulBruce · 2004-01-03 20:43:34

I could really do with some help here, this is the first time I have tried to get sound working under linux. I am using a Abit VT6X4 board with on-board sound (VT82C686A) AC97 compliant chipset. I am using Kernel 2.6 which uses the config from the 2.6 package but with added SCSI support. I created the audio group as per FAQ but with ^snd as well as ^sound in the devfsd.conf. I installed all of the ALSA packages, I added snd_via82xx and snd-pcm-oss to /rc.conf, I added the following to /etc/modules.conf

# ALSA portion
alias char-major-116 snd
alias snd-card-0 snd-via82xx
# module options should go here

# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0

# card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss

When I login (as user or root) I get the dreaded no dev/dsp error.
Now if I ls -la in /dev, I see no dsp file/directory, however, if i touch /dev/dsp I get an access denied error (as root).
If I lsmod I get the following listed, so the modules appear to load ok.

snd_pcm_oss            49412  0
snd_mixer_oss          17056  1 snd_pcm_oss
snd_via82xx            22688  0
snd_pcm                91168  2 snd_pcm_oss,snd_via82xx
snd_timer              22532  1 snd_pcm
snd_ac97_codec         52900  1 snd_via82xx
snd_page_alloc          9220  2 snd_via82xx,snd_pcm
snd_mpu401_uart         6432  1 snd_via82xx
snd_rawmidi            20768  1 snd_mpu401_uart
snd_seq_device          6504  1 snd_rawmidi
snd                    46596  9 snd_pcm_oss,snd_mixer_oss,snd_via82xx,snd_pcm,snd_timer,snd_ac97_codec,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore               7456  1 snd

kakabaratruskia · 2004-01-05 04:20:53

I have the exact same problem, but I have a section in my modprobe.conf for devfs support, and It's no use either.
This is my modprobe.conf

#
# /etc/modprobe.conf (for v2.6 kernels)
#

# ALSA portion
alias char-major-116 snd
alias snd-card-0 snd-intel8x0
# module options should go here

# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0
    
# card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss

# Sound lookup entries for devfs support
alias /dev/dsp sound-service-0-3
alias /dev/sequencer sound-service-0-1
alias /dev/mixer sound-service-0-0

# End of file

zen_guerrilla · 2004-01-05 11:56:49

My config, replace intel8x0 with your sound card & it should work :

alias char-major-116* snd
options snd cards_limit=1
alias snd-card-0 snd-intel8x0
alias char-major-14* soundcore
alias sound-slot-0 snd-card-0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias /dev/sound/dsp snd-pcm-oss
alias /dev/sound/sequencer snd-seq-oss
alias /dev/sound/mixer snd-mixer-oss
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 && { /usr/sbin/alsactl restore; }

farphel · 2004-01-05 14:02:36

I had the same problem a while back. My ALSA drivers were getting loaded, but not the OSS compatible drivers. A hack to get it working for me was to add them to my MODULES line in /etc/rc.conf.

MODULES=(!usbserial !ide-scsi snd-via82xx snd-mixer-oss snd-seq-oss snd-pcm-oss)

Your /etc/devfsd.conf needs to be set up correctly to link /dev/dsp to the appropriate devfs entry.

kakabaratruskia · 2004-01-05 18:07:47

zen_guerrilla wrote:

My config, replace intel8x0 with your sound card & it should work :

alias char-major-116* snd
options snd cards_limit=1
alias snd-card-0 snd-intel8x0
alias char-major-14* soundcore
alias sound-slot-0 snd-card-0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias /dev/sound/dsp snd-pcm-oss
alias /dev/sound/sequencer snd-seq-oss
alias /dev/sound/mixer snd-mixer-oss
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 && { /usr/sbin/alsactl restore; }

Thanks it worked.

Farphel, I already had the modules in my rc.conf, but thanks anyway.

BashfulBruce · 2004-01-07 21:36:33

Still having no luck here. I added snd-mixer-oss snd-seq-oss to the /etc/rc.conf. Farphel, you mentioned setting up the /etc/devfsd.conf to link /dev/dsp to the appropriate devfs entry, could you please give me an example of which lines do this.
I also inserted the following into /etc/modprobe.conf
(i take it modules.conf is now ignored with Kernel 2.6?).

alias char-major-116* snd
options snd cards_limit=1
alias snd-card-0 snd-via82xx
alias char-major-14* soundcore
alias sound-slot-0 snd-card-0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias /dev/sound/dsp snd-pcm-oss
alias /dev/sound/sequencer snd-seq-oss
alias /dev/sound/mixer snd-mixer-oss
install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx && { /usr/sbin/alsactl restore; }

farphel · 2004-01-07 21:51:38

Here's what I've got in my /etc/devfs.d regarding sound.

LOOKUP          snd             MODLOAD         ACTION snd
LOOKUP          dsp             MODLOAD
LOOKUP          mixer           MODLOAD
LOOKUP          midi            MODLOAD
REGISTER        sound/.*        PERMISSIONS     root.users 0660
REGISTER        snd/.*          PERMISSIONS     root.users 0660

DISCLAIMER: It works for me. I think there are other posts on the forum that may have other and/or better examples.

After you make changes to /etc/devfsd.conf, you can restart the daemon with

kill -HUP <pid of devfsd>

.

HTH,
farphel

Mr Green · 2004-01-09 13:10:03

Hi

I am having the same problems .....I have no /etc/devfs.d file or dir whats going on?

Mr Green :mrgreen:

sasdav · 2004-01-09 16:34:23

Well, sound works fine for me in gnome or console, so let me show what I have. First I added a group called audio. Then whenever I add a user I use -G audio,etc to the useradd command. Here's what I have in my files.

modules.conf:
# ALSA portion
alias char-major-116 snd
alias snd-card-0 snd-cs4236 #change this to your own driver
# module options should go here
# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0
# card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias /dev/dsp sound-service-0-3
alias /dev/sequencer sound-service-0-1
alias /dev/mixer sound-service-0-0

devfsd.conf
REGISTER sound/.* PERMISSIONS root.audio 660
REGISTER snd/.* PERMISSIONS root.audio 660

Mork II · 2004-01-11 12:58:59

I also lost /dev/dsp after going 2.6. The solution for me was to clear out modules.conf and modprobe.conf entirely and load everything from rc.conf:

MODULES=(snd-intel8x0 snd-mixer-oss snd-seq-oss snd-pcm-oss)

Mixer settings are restored from rc.local

aumix -w 50 -v 85 -c 50

BashfulBruce · 2004-01-12 16:17:12

Still getting nowhere fast, I can't help but feel that I am doing something fundamentally wrong. I have tried all of the suggetions, even cleared out modprobe.conf and modules.conf to no avail. Maybe, if someone could explain how /dev/dsp is created when using Kernel 2.6 I could troubleshoot this better.

Thanks

Bruce :?

link · 2004-06-25 20:07:20

I'm not sure if this is still an issue, but I've found the only way to load these alsa modules on boot is from within /etc/rc.conf

Adding the line

install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 && { /usr/sbin/alsactl restore; }

Will make the mixer state get restored, but you still need to add the modules to /etc/rc.conf. /etc/rc.sysinit loads each module from that array with /sbin/modprobe, which reads /etc/modprobe.conf for its config.

/dev/dsp is created by devfsd when the snd-<card> module is loaded I believe. Either that or the snd-pcm-oss module.

Arch Linux

#1 2004-01-03 20:43:34

Can't get sound to work - no /dev/dsp !!!

#2 2004-01-05 04:20:53

Re: Can't get sound to work - no /dev/dsp !!!

#3 2004-01-05 11:56:49

Re: Can't get sound to work - no /dev/dsp !!!

#4 2004-01-05 14:02:36

Re: Can't get sound to work - no /dev/dsp !!!

#5 2004-01-05 18:07:47

Re: Can't get sound to work - no /dev/dsp !!!

#6 2004-01-07 21:36:33

Re: Can't get sound to work - no /dev/dsp !!!

#7 2004-01-07 21:51:38

Re: Can't get sound to work - no /dev/dsp !!!

#8 2004-01-09 13:10:03

Re: Can't get sound to work - no /dev/dsp !!!

#9 2004-01-09 16:34:23

Re: Can't get sound to work - no /dev/dsp !!!

#10 2004-01-11 12:58:59

Re: Can't get sound to work - no /dev/dsp !!!

#11 2004-01-12 16:17:12

Re: Can't get sound to work - no /dev/dsp !!!

#12 2004-06-25 20:07:20

Re: Can't get sound to work - no /dev/dsp !!!

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