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I have an acer aspire 722, I recently went to use gmail/talk as well as empathy and realized that the microphone does not work. I checked the sound settings, adjusted microphone level, did a mic test but the level indicator showed no bars.

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Which version of Ubuntu are we talking about here? – Benjamin Aug 27 '12 at 5:21

Now my speakers work & mic work:

  • I installed linux-image-3.4.0-999-generic-pae_3.4.0-999.201205070447_i386.deb
  • and then adjusted mic boost in alsamixer
  • sudo alsactl store
  • added to startup applications: alsactl restore
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linux-image-3.4*? All that's available to me is up to 3.2 in Precise. – Benjamin Aug 27 '12 at 5:30
in precise, you can usually install newer kernels through the hardware enablement stack because precise is LTR – mchid Nov 28 '15 at 21:26

You need to unmute the microphone input. Try running alsamixer in a Terminal window (Ctrl+Alt+T), and checking it there. If it's muted or low, you can unmute and/or increase it in alsamixer.

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  • Open a terminal window by pressing Ctrl+Alt+T and type: alsamixer.
  • Press F6 and choose 1 HDA ATI SB as a sound card to configure by pressing Enter.
  • To see the mic-related sliders, press F5 and move the cursor keys to the right, only the outermost three sliders need to be set to a level of 56 by pressing the Up key
  • Then, by pressing the C key on each of the three sliders, the volume level of each right channel needs to be put to 0
  • finally, quit alsamixer by pressing ESC.


After each reboot, you may need to toggle the Mute button by:

  • Click on the speaker icon on top right panel and choose Sound Settings...
  • Click on the Input tab (second from left) and adjust input volume to Unamplified 100% and say something to see if the input level indicator moves enough. If not, click on Mute to mute and then click again to unmute.

Hope this helps

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