Ubuntu 16.04 Sound Won't Unmute

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

2 Answers

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.