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user258532
Asked: 2015-03-21 10:21:47 +0800 CST

Ubuntu 14.04 - sound not working, "Dummy Output"

  • 772

Today, I discovered the sound of my laptop (Acer Aspire E1 532) not working anymore.

The sound settings say "Dummy Output", and

sudo aplay -l

returns 

aplay: device_list:268: no soundcards found...

I have applied all the hints given here.

Is there another hint?

sound

4 Answers

  1. I had to roll back the kernel as well:

    sudo apt-get remove linux-image-3.16.0-34-generic

    now I have this kernel version

    $ uname -r
3.16.0-30-generic

    I have tried everything I could find in Internet; nothing helped, only the previous kernel

    • 1
  2. Best Answer

    I saw that somebody has solved that sound problem by "rolling back" the kernel version.

    I used

    uname -r

    giving me the kernel version. I removed that kernel version with: 

    sudo apt-get remove linux-image-3.13.0-46-generic

    During the removal, I saw that a new DKMS sound driver was being installed. After rebooting, the sound worked! And

    uname -r

    now gives me

    3.13.0-45-generic

    as the kernel version.

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  3. Can you open a bug in lanchpad for these issues, so we can debug further? A bug can be opened by running the following from a terminal:

    ubuntu-bug linux

    • 0

  4. My laptop (a Dell Inspiron), no longer recognized the laptop speakers.

    I reloaded the kernel using

    sudo apt-get install linux-image-generic-lts-utopic

    Went back to the standard sound control and found the access to the laptop speakers had been restored.

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