Microphone is not working. Any (quick) fix?
**** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog] Subdevices: 1/1 Subdevice #0: subdevice #0
by these steps :-
have you tried cleaning out the mic jack? gunk in the jack could make the card detect a mic plugged in even though it should be using the built-in...
check /dev/snd for files ending in c. these denote capture devices, if they're not present then you're stuffed from the start.
another user already noted the initialized as muted problem, but it's still something to re-check.
fire up audacity and check the input devices -- usually the third drop down under buttons -- to make sure you're using the appropriate mic(front/rear)
if you can select the appropriate mic and record in audacity but the default capture device is inappropriate then select the proper one in sound preferences. some webcams may steal the mic, just something worth noting.