Re: microphone not working in Acer 4736G Model
I don't know if this helps. I opened "alsamixer" in terminal & set it side by side on screen with "sound" from preferences.
First check the input tab in "sound" make sure that the mute box in not ticked.
Second I worked my way along "alsamixer" with my mic plugged in to find which setting triggered a response within "sounds" for me it was the digital control in alsamixer, I had to set to "analog1" - bingo!!!
Hope this is of some help...
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Do it like your mother told you!!
Reg Linux Dude #412975