I am using HP Pavilion 15 -no11tu which has been awarded the status of Enabled for Ubuntu.
When ubuntu was shiped with my hp laptop,Everything worked fine including wifi,webcam and bluthooth.
Some days ago I formatted my System and reinstalled ubuntu 12.04.3 lts which i downloaded for ubuntu website. But Insted of connecting my system to internet and after doing all update and upgrade ubuntu didnt detected my system wifi,bluetooth and webcam.
HP does not provide driver support for linux.