I have a Internal Audio Hardware card and my Laptop (Lenevo IdeaPad) presents a single slot as a combo Microphone and headphone jack.
On Windows, I attach my ipod headphone to jack and speak directly to my computer. I assume there is a microphone which is listening to my voice and I can communicate two-way. On Ubuntu, the microphone always seem to be listening to random noise. So any input by speaking to the computer is not possible. What could be the reason and how do I troubleshoot this?