Comment 52 for bug 269294

Hi friends!
First, sorry for my problems with write in english. I will try do my best!
My notebook is an Acer 5520-5912, with chipset nvidia mcp67, audio alc268. I've the same problem with my microphone, and any options (acer, acer-aspire, acer-dmid) that i tried in alsa-base have produced the same problem. When I record my microphone, depending of the volume bar, I have silence or much noise.

I have looking for informations in many places, and I think that the problem is with the kernel >2.6.25, because I founded the same problem with Debian Lenny, Ubuntu Intrepid, Ubuntu Jaunty, and I've learned in some forums that the same occurs with Gentoo, Mepis, etc. In debian Lenny my problem was solved when I "downgrade" to kernel 2.6.25. I've noticed too that in kernel until the version 2.6.25, in "input source" box I have the option "front mic", and for kernel>2.6.25 I have the option "Internal Mic".

I'm trying to help the community, and I hope that my informations can be useful.
Obs: Ubuntu Jaunty Beta is fantastic, I'm running him now!

Thanks from Brazil!