The problem still persists but I found a curious thing: in my X550LA if I start the computer directly in Ubuntu, the microphone doesn't work, no matter what I do.
If I start the notebook with Windows 7, access the built-in microphone with any tool or website and then restart in Ubuntu, the problem is gone: the microphone works perfecty.
The problem still persists but I found a curious thing: in my X550LA if I start the computer directly in Ubuntu, the microphone doesn't work, no matter what I do.
If I start the notebook with Windows 7, access the built-in microphone with any tool or website and then restart in Ubuntu, the problem is gone: the microphone works perfecty.
I don't know why but it works like this...