Aah yes, the joys of Linux installation. You need a stone altar and a live herring. You must sacrifice the herring to appease the mighty Dreadlord Tux. He might grant you a successful installation, but he normally just pecks your eyes out and craps in your mouth.
I may be a Linux fanboy but the installation is still a joke in many cases. For a given macchine, some distros work, others crash completely, some just stop part way through.
For example, my old fileserver had a VIA M10000 itx board. It's been around for a while, and kernel driver support for the hardware is there. Mandrivel 2006 installed fine, Fedora Crap 6 installed flawlessly too. Unbuntu 6.06? No. Stops on both graphical and text-based installs. Remains responsive, but the install just stops. Not even a clue-bearing error message. Wonderful.
The FLOSS hippies still wonder why it's not "the year of the Linux desktop" too. Sigh.
</rant>
If you can't find a simple fix out there, then all you can do is file a bug report with Ubuntu and use a distro that'll install. Welcome to crapland.