Well I'm still a newbie in Ubuntu. I'm using UBUNTU 12.04 precise edition version. The problem is my WiFi connection. I've been working on it since far too long all by myself and now I think I have really messed it up and I need some expert help. I read many threads of this forum which were related to my problem and still it didn't work for me.
Now the situation is,even rfkill list all command shows nothing. :(