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Thread: No sound / only dummy output

  1. #1

    Question No sound / only dummy output

    Hey,
    I've restarted my laptop after a few weeks and I can't play any sound (it has worked before the restart).
    If I go to system settings > multemedia, it shows only dummy output for sound. I can't even play test sound via YaST.

    Output from alsa-info.sh: http://pastebin.com/ypCNXhAw

    I have 13.1, KDE 4.11.5
    alsa and pulse should be installed:
    Code:
    jaa@suse:~> rpm -qa | grep alsa
    alsa-firmware-1.0.27.git20140207-2.1.noarch
    alsa-1.0.27.2-174.1.x86_64
    alsa-devel-1.0.27.2-174.1.x86_64
    alsa-utils-1.0.27.2-116.1.x86_64
    alsa-plugins-1.0.27-81.1.x86_64
    alsa-plugins-pulse-1.0.27-81.1.x86_64
    pyalsa-1.0.26-18.1.x86_64
    alsa-oss-1.0.25-44.1.x86_64
    alsa-oss-32bit-1.0.25-44.1.x86_64
    alsa-plugins-jack-1.0.27-81.1.x86_64
    alsa-tools-1.0.27-66.1.x86_64
    alsa-tools-gui-1.0.27-66.1.x86_64
    jaa@suse:~> rpm -qa | grep pulse
    pulseaudio-module-x11-5.0-1.1.x86_64
    libpulse-mainloop-glib0-5.0-1.1.x86_64
    pulseaudio-5.0-1.1.x86_64
    libpulse0-32bit-5.0-1.1.x86_64
    pulseaudio-module-jack-5.0-1.1.x86_64
    libpulse0-5.0-1.1.x86_64
    alsa-plugins-pulse-1.0.27-81.1.x86_64
    pulseaudio-utils-5.0-1.1.x86_64
    libpulse-devel-5.0-1.1.x86_64
    libxine2-pulse-1.2.3-89.5.x86_64
    Any idea what could be wrong? Thanks for any help!

  2. #2
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    Default Re: No sound / only dummy output

    Quote Originally Posted by Jaa-c View Post
    Any idea what could be wrong? Thanks for any help!
    I get something similar on my work desktop. I'm pretty sure that's because there is no sound card installed. A dummy sound device is created.

    Is it possible that you have a hardware failure?
    openSUSE Leap 15.3; KDE Plasma 5.18.6;

  3. #3

    Default Re: No sound / only dummy output

    Quote Originally Posted by nrickert View Post
    Is it possible that you have a hardware failure?
    No, I also have windows installed and sound works OK.

  4. #4
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    Default Re: No sound / only dummy output

    Quote Originally Posted by Jaa-c View Post
    Hey,
    I've restarted my laptop after a few weeks and I can't play any sound (it has worked before the restart).
    If I go to system settings > multemedia, it shows only dummy output for sound. I can't even play test sound via YaST.

    Output from alsa-info.sh: http://pastebin.com/ypCNXhAw
    I can't see anything that explains only the dummy output for sound in your post, but I note from that script you have the speakers switched OFF on your PC's openSUSE:
    Code:
    Simple mixer control 'Speaker',0
    
      Capabilities: pvolume pswitch
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 74
      Mono:
    
      Front Left: Playback 0 [0%] [-74.00dB] [off]
    
      Front Right: Playback 0 [0%] [-74.00dB] [off]
    Last edited by oldcpu; 15-Mar-2014 at 02:49.

  5. #5

    Default Re: No sound / only dummy output

    Quote Originally Posted by oldcpu View Post
    I can't see anything that explains only the dummy output for sound in your post, but I note from that script you have the speakers switched OFF on your PC's openSUSE:
    Well I don't know, how to turn it on.. All the usual volume controls are on 100% (alsamixer, yast,..). But I gues the dummy output is the real problem....

  6. #6
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    Default Re: No sound / only dummy output

    Install pavucontrol from the Packman repo. That gives you the IMHO best tool to analyze and fix your audio issue. Like oldcpu states, it's clear that the speaker volume is at 0.
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  7. #7

    Default Re: No sound / only dummy output

    Quote Originally Posted by Knurpht View Post
    Install pavucontrol from the Packman repo. That gives you the IMHO best tool to analyze and fix your audio issue. Like oldcpu states, it's clear that the speaker volume is at 0.
    I did, but it also shows only dummy output.
    __
    edit:
    OK, so I've noticed that speakers were actually muted in alsamixer (I don't know how I've missed it before), so I turned it on. It still doesn't work with pulseaudio, but if I disable pulseaudio in YaST, the sound works (it shows default instead of dummy device in system settings)...

    I would still like to get pulseaudio working, but at least I have sound now...

  8. #8

    Default Re: No sound / only dummy output

    Quote Originally Posted by Jaa-c View Post
    But I gues the dummy output is the real problem....
    One thing that could cause only a dummy output to appear is when you have timidity running as system daemon, as it blocks the sound card for PulseAudio.
    Did you enable this maybe? Check in YaST->System->Services Manager.

    There may be other stuff that could block the sound card, so maybe try to disable other things as well that might have to do with sound, like speech-dispatcher or festival f.e.
    When they start up at boot, no PulseAudio is running yet, so they might use Alsa directly instead of PA which would cause PA to not be able to grab the sound card.

    You could also try to disable PulseAudio as a test in YaST->Hardware->Sound->Other->PulseAudio Configuration. Does the sound work then after a reboot?

  9. #9
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    Default Re: No sound / only dummy output

    Quote Originally Posted by Jaa-c View Post
    Well I don't know, how to turn it on.. All the usual volume controls are on 100% (alsamixer, yast,..)
    hmmmm ... I can't see your alsamixer output, but that statement I quote is difficult for me to accept. alsamixer is nominally very good. Possibly there is an additional alsamixer menu you need to bring up ?

    As a different approach, did you try the 'amixer' command to turn on the 'speaker' ? ie something like:
    Code:
    amixer -c 0 -- sset 'Speaker' on 90%
    where I am guessing at the syntax. Note where I have spaces and dashes is critical. Don't deviate from my syntax (assuming I have it correct).

    Then if that is successful, try testing the audio with:
    Code:
    speaker-test -c2 -D hw:0,0  -l2 -twav
    I'm guessing 2 channel with the -c2 and also guessing you have this setup to send sound not to your HMDI device but to your speakers.

    Quote Originally Posted by Jaa-c View Post
    . But I gues the dummy output is the real problem....
    I can't see anything in the script to support that. Please, can you provide a screen print or something, that can help us understand that assessment ?

    Did you try tuning pulse audio ?

    There is guidance here in a couple of blogs:


  10. #10
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    Default Re: No sound / only dummy output

    Quote Originally Posted by Jaa-c View Post
    OK, so I've noticed that speakers were actually muted in alsamixer (I don't know how I've missed it before), so I turned it on. It still doesn't work with pulseaudio, but if I disable pulseaudio in YaST, the sound works (it shows default instead of dummy device in system settings)...

    I would still like to get pulseaudio working, but at least I have sound now...
    ok , ... I missed this edit.

    Well done !!

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