This really make me struggle , I have upgrade my dell xps13 9333 from ubuntu 13.10 to 14.04, now I could never connect to the wifi at home. The wifi card can see the wireless network, but cannot connect to it, sometimes it does, but if I ping some external server in the internet, it disconnected the wifi automatically, I have also tried the ubuntu gnome 14.04, it keeps asking the wifi's password, and still cannot connect to the internet. But the laptop can connect to the open wifi in my company, which make me crazy, I cannot figure out which part is wrong.
The encryption of my home is WPA/WPA2 Personal.
Any one can help could be very appreciate.