Sound Input device (microphone) not working

I have recently updated my laptop OS from Ubuntu 12.04 to 14.04

After updating the OS, my laptop's input device ie., microphone is not working.

Earlier it was working with Ubuntu 12.04.

Also there is no sound input device driver detected

I am using Dell Vostro 1014.

after running command $ gstreamer-properties, output is:

I think my microphone is working but is not being betected by ubuntu as in above screenshot.

But after running Pulse Audio Sound Control, it shows input sound progress, it means input device is working but not being detected. Even by Sound Recorder.

After running alsamixer the output is:

I had a similar problem - no sound input device driver detected. I used pavucontrol, as explained in this Ask Ubuntu answer and it solved the problem:

• Install pavucontrol: sudo apt-get install pavucontrol
• Run:pavucontrol
• Go to the Input Devices tab
• Click the lock icon to unlock the channels
• Under Port, select the correct microphone (front or rear)

try this in terminal for no sound:

sudo alsa force-reload

restart device and check if sound is workin?

if it doesnt do this:

sudo apt-get remove --purge alsa-base pulseaudio

sudo apt-get install alsa-base pulseaudio

Restart device and check ..This should probably do the job!

Open a terminal and issue the command alsamixer you will get a screen like this:

use the right arrow to highlight the Front Microphone

if it's muted as shown above, hit the 'M' key to toggle Mute off.

then use the up arrow to increase the gain (sensitivity) your end result should look similar to this. Hit the Esc key to exit. Your Microphone should now work as advertised.

Had the same problem. Solved it like this:

• Run pavucontrol from the terminal window.
• Check microphone level and mute switch in tab Input Devices.
• Open tab Recording.
• In parallel, start the recording function in the wanted application. E.g. press record in Audacity or start a test call in Skype.
• In the Recording tab of pavucontrol, now a source selection becomes available. Select the right one. Worked for me.

To me it is (was) confusing that the source selector is not always present in pavucontrol.

Goto PulseAudio volume control --> Configuration, choose "Analog Stereo Duplex" under the Profile section.

Restart your machine.

*Tried in Ubuntu 16.04 LTS