i have a hp dv6qe. i have had no problems with wifi working with the driver installed in 10.04 and 10.11. however once i installed 12.04 i had major problems with my wifi connection. it would always be connected however, the connection would often time out maing the internet not usable. i fixed this by manually reinstalling my wifi driver.

theres a post of me explain how to do this with a link to a youtube video showing how i did it

http://ubuntuforums.org/showthread.php?t=1944493

hope this helps

wifi is back online