yesterday I installed 16.04 over Windows Vista. It worked perfect, until later I noticed the sound wouldn't unmute. It has a check-mark next to Mute, but it won't let me unmute it. When I go into sound settings, it lets me uncheck the mute button, but still has a little speaker with an x at the top and I can't hear anything.

EDIT: This is my output of sudo lshw |grep -A9 Audio

 description: Audio device
             product: 82801I (ICH9 Family) HD Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 02
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:28 memory:fdff4000-fdff7fff
  • Have you reviewed wiki.ubuntu.com/DebuggingSoundProblems
    – Elder Geek
    Aug 20 '16 at 15:15
  • None of the solutions worked.
    – RedStar12
    Aug 20 '16 at 15:28
  • Please edit your question to provide more information. At the very least provide the output of sudo lshw |grep -A9 Audio
    – Elder Geek
    Aug 20 '16 at 15:50
  • Sorry for late reply. I edited it.
    – RedStar12
    Aug 21 '16 at 23:01
  • Interesting. Is there a mute button on your keyboard? Does the sound work if you boot from live media?
    – Elder Geek
    Aug 22 '16 at 21:28

I am not sure whether this solution work or not, after hours of debugging I have deleted the pulse audio config settings and boom!!!, it worked.

Take backup before doing it and do it at your own risk

  1. take a backup first

    cp -r ~/.config/pulse ~/.config/pulse_bak
  2. remove the pulse config

    rm -rf ~/.config/pulse

Good luck


After hours of frustration and hard work finally found a command that fixed this annoying issue of device not getting unmute, here goes the command

sudo apt-get install pulseaudio-module-x11

After this open pulse audio(just search it) and if that opens normally then your issue is fixed.

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