What is the exact model number of your computer? Do you have a specialized PCI graphics card (Nvidia would be my first guess.)
Thanks.
Here's a slight technical disclaimer on this one. Ubuntu installs can be difficult, and I cannot promise you an answer, but I will work hard to figure out the issue and assist you. If I cannot provide you a solution, I will open up the question to allow other Experts to assist you.
Ok thank you. That particular card has been an issue for both installation and after installation. Just to get Ubuntu installed, try installing in text mode. This way graphics is not a requirement for installation and most of the time you can get a graphics display once you have the operating system installed.
When you download Ubuntu there is an "Alternate Disk" that you can download and use for installation that has this option:
http://www.ubuntu.com/getubuntu/downloadmirrors#alternate
Computer Systems Engineer
Microsoft and Cisco Certified with 17 years experience, CISSP information security professional