Connect LG Optimus 2X to Windows/Ubuntu via Bluetooth/Data Cable to use Internet

I want to connect my LG Optimus 2X (P990) to my PC to use the Internet. I tried using the LG PC Suite 4 available for windows, but it crashes as soon as I make a connection with my phone. And, There's no option in the suite to use the Internet connection from the phone. Also, I can't get Ubuntu to detect a connection from my phone (both Bluetooth and Data Cable). Please help me out with this. Thanks in advance.