I have an HP dv7 6135dx and there is no audio on the computer. I have already edited the alsa file in modprobe.d. Nothing will get my audio back up and running. I tried running vlc, youtube, and a cd but still no success. It worked when I did a fresh installation of the ubuntu operating system. I blacklisted some unnecessary drivers from running on boot but have already removed them from the blacklist. I am running 12.04 because 12.10 is no working for my computer.