F11 - Acer Aspire 5738Z built-in mic not working

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http://forums.fedoraforum.org – Hi all. Can somebody help me solve this problem? Everything works fine except the damn built-in microphone. I did follow this guide to no avail (that is, no errors, but still no go with the mic - no problem with the speakers). The only application I have to test the mic is Skype and when I try to make a test call I only hear a loud noise instead of my voice. No problems when I use my USB headset. Also note I'm kinda newbie, but willing to learn. ;) TIA. Alessandro (HowTos)