Ok, here I am again as I promised. the problem: when I try to make a recording in my laptop (integrated mic), I am able to hear myself (when I reproduce it afterwards) but with a lot of noise. I read a solution of going to alsamixer and disabling "L-R" in capture, but when I do that,I am not able to hear anything. Any suggestions? Thx!
Another thing (I don't know if that has to do with it) is that when I go to volume control->recording, every time I see a small red "x" in every mic (microphone, capture, internal mic) and if I enable them, close and reopen volume control the same "x"s appear.
lspci |grep -i audio
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)