Trinity on newer Dell

Haven't been having luck with a new Dell Precision T5500n (2 x dualcore "E5503" and 12 GB RAM). The problem seems to be the ATI FirePro V7800 card. I can install Ubuntu Natty on it no problem. However, when I try to load the preconfigured Trinity/Maverick disc, I get the little "keyboard = human" screen and can escape to the menu, but when I try to "try Kubuntu without installing" I get the Kubuntu logo with the progress dots ... then nothing. In fact, nothing with the monitor icon indicating that the display lost the signal. Can I install the Trinity packages onto an Ubuntu Natty installation instead? Peter -- Peter Laws / N5UWY National Weather Center / Network Operations Center University of Oklahoma Information Technology plaws(a)ou.edu -------------------------------------------------------------------------- Feedback? Contact my director, Matt Younkins, younkinsm(a)ou.edu. Thank you!