[SOLVED] alsa /dev/dsp

jaro · 2015-02-02 15:38:17

Hi

I have some old style programs installed on my linux box that require /dev/dsp to run.
I've upgraded my machine recently and now I find /dev/dsp1 only.

I got several onboard sound cards in my system. "aplay -l" shows me:

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 1: PCH [HDA Intel PCH], device 0: ALC3220 Analog [ALC3220 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0

dmesg shows:

[ 1.868159] sound hdaudioC1D0: autoconfig: line_outs=1 (0x1b/0x0/0x0/0x0/0x0) type:line
[ 1.868161] sound hdaudioC1D0: speaker_outs=1 (0x14/0x0/0x0/0x0/0x0)
[ 1.868162] sound hdaudioC1D0: hp_outs=1 (0x15/0x0/0x0/0x0/0x0)
[ 1.868163] sound hdaudioC1D0: mono: mono_out=0x0
[ 1.868163] sound hdaudioC1D0: inputs:
[ 1.868165] sound hdaudioC1D0: Front Mic=0x1a
[ 1.868166] sound hdaudioC1D0: Rear Mic=0x18
[ 1.873324] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input4
[ 1.873340] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input5
[ 1.873355] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1b.0/sound/card1/input6
[ 1.873369] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input7
...
[ 2.311149] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input12
[ 2.311194] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input13

"lsmod | grep snd" shows:

snd_hda_codec_hdmi 49263 1
snd_hda_codec_realtek 63196 1
snd_hda_codec_generic 63087 1 snd_hda_codec_realtek
snd_hda_intel 26387 0
snd_hda_controller 26938 1 snd_hda_intel
snd_hda_codec 112621 5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep 17244 1 snd_hda_codec
snd_pcm_oss 49005 0
snd_mixer_oss 21998 1 snd_pcm_oss
snd_pcm 88785 5 snd_pcm_oss,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_timer 26614 1 snd_pcm
snd 73436 10 snd_hda_codec_realtek,snd_pcm_oss,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_mixer_oss
soundcore 13031 2 snd,snd_hda_codec

I tried several steps but they didn't help. I still cannot rename /dev/dsp1 to /dev/dsp.
I put the following into ~/.asoundrc:

pcm.!default {
type hw
card 1
}
ctl.!default {
type hw
card 1
}

I prevented the snd_hda_codec_hdmi from beeing loaded at boot.
I want to have my /dev/dsp back :-) Please help me.

When I manualy rename /dev/dsp1 to /dev/dsp everything works fine.

Thanks in advance for help.

Last edited by jaro (2017-08-07 19:31:05)

karol · 2015-02-02 16:57:35

When I needed /dev/dsp I had to run 'sudo modprobe snd-pcm-oss'.

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jaro · 2015-02-03 08:08:08

Thanks for the reply.
Unfortunately it is not that issue.
You can see the module snd_pcm_oss listed above.

Lone_Wolf · 2015-02-03 14:07:28

I put the following into ~/.asoundrc:
...
I prevented the snd_hda_codec_hdmi from beeing loaded at boot.

Hard to predict if it will solve the porblem, but you can simplify your sound configuration a lot.

Create /etc/modprobe.d/50-alsa.conf like this :

options snd-hda-intel index=1,0 # hdmi will be secondary card, analog default

Then revert whatever you did to prevent the snd_hda_codec_hdmi from beeing loaded at boot and remove ~/.asoundrc .
Reboot and you should have both audio outputs present and usable, with the analog output as default.

Arch Linux

#1 2015-02-02 15:38:17

[SOLVED] alsa /dev/dsp

#2 2015-02-02 16:57:35

Re: [SOLVED] alsa /dev/dsp

#3 2015-02-03 08:08:08

Re: [SOLVED] alsa /dev/dsp

#4 2015-02-03 14:07:28

Re: [SOLVED] alsa /dev/dsp

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