OK, my bad (and probably Jamin's). I had only installed linux-image-3.5.0-18-generic, while infact I needed to install linux-headers-3.5.0-18-generic and linux-image-extra-3.5.0-18-generic as well. After I installed all packages, I have wireless back, and the sound works as well. I think Jamin has made the same mistake. I apologize for my mistakes.
OK, my bad (and probably Jamin's). I had only installed linux-image- 3.5.0-18- generic, while infact I needed to install linux-headers- 3.5.0-18- generic and linux-image- extra-3. 5.0-18- generic as well. After I installed all packages, I have wireless back, and the sound works as well. I think Jamin has made the same mistake. I apologize for my mistakes.