Hi there

I got an Dell XPS 16 which already has the latest ubuntu (oneiric) on. I'm using Ubuntu on this machine since 9.04.
When I create a bootable usb disk and try to install it into an other partition I get graphical errors and cannot see the menu.

But something is working in the background because I can see something moving like a console displaying changing text and if I type enter something seems to change.

My graphic card is a ati mobility radeon hd3670

Hopefully someone can help?