I need to install the audio bugfixes that are in the 3.9 kernel. I am currently running 12.04 LTS. I see that the mainline kernel directory does not contain a 3.9 kernel for the precise release. Is it possible to install a mainline kernel for 13.04 or 13.10 on 12.04, or is there another way to get a 3.9 kernel for 12.04? Thanks, Nataraj