I'd try another Distro to see if it's just your netbook and specific version of Ubuntu that's causing the problem. I'm currently running a very interesting version called JoliCloud which will run from a USB stick so you can test it without actually installing on your hard disk. It's one of the nicest versions I've seen and is definitely 'cloud' computing at it's best. It works 100% on my netbook without any amendments click here .
The Linux distro you are using does not appear to have the graphics drivers for your computer. Details of which you have not provided. If it's old then it's time to move on and forget it. If it's new (very) then the drivers may not be incorporated yet. Try another distro.click here for a lot of options.