sudo add-apt-repository ppa:ubuntu-audio-dev/ppa; sudo add-apt-repository ppa:ricotz/unstable;  sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install  linux-sound-base alsa-base alsa-utils gdm ubuntu-desktop  linux-image-`uname -r` linux-alsa-driver-modules-$(uname -r) libasound2; sudo apt-get --reinstall install  linux-sound-base alsa-base alsa-utils gdm ubuntu-desktop  linux-image-`uname -r` linux-alsa-driver-modules-$(uname -r) libasound2; killall pulseaudio; rm -r ~/.pulse*