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All of a sudden, sound from all applications plays from both speakers and headphones when I plug in the headphones.

I've checked lots of similar questions but they all apply to older versions of Ubuntu and/or other hardware, and I haven't found a solution yet. I do however have a workaround.

My workaround for now is:

This line at the end of the alsa conf /etc/modprobe.d/alsa-base.conf

options snd-hda-intel model=lenovo

and then in alsa-mixer I have set the volume for Speaker to 00. If I mute the Speaker, no sound comes from the headphones nor from the speakers.

Notes:

  • In alsa-mixer Auto-Mute Mode is set to Enabled
  • Laptop is a Lenovo ThinkPad E420s
  • This has started in the last week, and the kernel was updated on 13/01/2015
  • The headphones work normally with other devices (phone etc).
  • It's not specific to any application.
  • There are no options in the Sound Settings dialog that help (or that haven't been clicked to death already)

My codecs: 

msturdy@mariachi:~$ cat /proc/asound/card*/codec* | grep Codec  
Codec: Conexant CX20590   
Codec: Intel CougarPoint HDMI

Kernel:

msturdy@mariachi:~$ uname -a
Linux mariachi 3.13.0-44-generic #73-Ubuntu SMP Tue Dec 16 00:22:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Any ideas or possible solutions? I'm all ears!

Community
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msturdy
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1 Answers1

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I noticed the same problem once I got the most recent updates.

I see you're also using alsa-mixer. If you're using it because PulseAudio was giving you problems, then my solution might work.

It seems that PulseAudio got reinstalled (at least partially) with this round of updates. Once I removed Pulse, which you can do with this command:

sudo apt-get autoremove pulseaudio

(with more tips if need be in these instructions) I was able to reconfigure my speakers and headphones again in alsa-mixer, and everything works.

I hope that'll do it for you. (Thanks for the tip, Mitch)

gurk
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