17

Possible Duplicate:
My sound stopped working today, how can I fix it?

I'm baffled by this discrepancy:

  1. This speaker test is successful:

    speaker-test -c 6 -D 'surround51:CARD=PCH,DEV=0'

  2. Sound Settings is behaving as if I have no sound card:

    Sound Settings

How do I find out what's causing this problem?

Details

Have a look at aplay -L, pacmd list-cards, lshw, pulseaudio -vvvv, and pavucontrol. I do not use HDMI.

This discussion of a similar problem on a PulseAudio mailing list suggests that changes to /etc/pulse/default.pa might be responsible, but I have not edited this file.

Community
  • 1
ændrük
  • 75,636
  • 74
  • 233
  • 365

2 Answers2

6

Turns out I was running into Bug #590780: Installing "randomsound" package causes Pulseaudio to stop functioning at reboot and didn't know it yet. See this answer:

  1. Run pstree | less
  2. In that, type /arecord and press return to find the arecord process.
  3. Press up once and you'll see its parent. In my case this was randomsound.
terdon
  • 98,183
  • 15
  • 197
  • 293
ændrük
  • 75,636
  • 74
  • 233
  • 365
0

Have you tried to rebuild the alsa sound module? If no, try the following:

sudo apt install module-assistant build-essential

sudo module-assistant prepare,update

sudo module-assistant build,install alsa

sudo depmod

This should reset your sound settings.

gido5731
  • 15
  • 1
  • 7
blackedx
  • 638
  • 1
  • 6
  • 10
  • 1
    Which "sound settings" does this reset, and why do you recommend doing this? I'm not yet convinced that the problem is within ALSA, since it appears to [detect my sound cards correctly](http://paste.ubuntu.com/1149561/). – ændrük Aug 16 '12 at 01:38
  • "Sound settings" corresponding to the image you linked above in your question. ALSA y detecting your sound card but isn't showing it in the "selec device" section. after this it should show it. – blackedx Aug 16 '12 at 02:10