Well, how are you trying to connect to the Internet? Are you using a wired or wireless connection? If wired, then you'll have to try and find out what networking chipset is used by your motherboard and then see whether or not anyone has gotten it working with Linux. If wireless, it's more or less the same, only the odds of success are significantly lower.
Finally, a minor point but some won't be as kind. It's Ubuntu Linux, not Linux Ubuntu. Linux is the OS, Ubuntu is the distribution.
hello every1. i have finished my first build and i have installed linux ubuntu version 9.04 but i am having some difficulties with getting my motherboard to work with it. the make is an ECS A780GM-A black series. i was wondering if there is a special driver for it or what do i have to do.. the problems i am having is not being able to connect to the internet as far as i can tell that's the only thing because the monitor works and my keyboard and mouse's wireless sensor r plugged into a usb port on the board. any help is greatly appreciated. oh also idk if this is important or not but the hard drive is connected via SATA and the cd drive is connected via IDE