Thanks @laag. I followed the steps #115 and it worked on my Alienware 13 Ubuntu 14.04 kernel 3.16 . Although the touchpad stopped working after the installation but later found a solution for that as well.
Thanks @laag. I followed the steps #115 and it worked on my Alienware 13 Ubuntu 14.04 kernel 3.16 . Although the touchpad stopped working after the installation but later found a solution for that as well.