i have installed Ubuntu on about 6 other computer without a hitch but it won't install on my dads dell studio 7100 w/ a phenom 2 proc and an amd hd 5850. it gets to the screen with the five loading dots and than the monitor doesn't detect my computer and sleeps I've tried 6 times on this one computer with no succes
If it is just a video problem, you might get to a text console by pressing <ctrl><alt><F1>. At least that will get you to the point where you can do things like reconfigure the video drivers and so on. I'd start with 'sudo lspci -v'|less' to check out the video driver H/W. Then search that with Ubuntu and see if you find any hints to get things working.
Another useful command might be 'sudo lshw -c video' to identify video H/W
Wow, an update for my progress after 6+ months... I must've been busy
I got Ubuntu to work on my Soltek computer last night, apparently any video card I put in the AGP slot wouldn't work, didn't work last night, until I took the motherboard out of the case and breadboarded the whole thing... I think something in the case was preventing me from seating the video card all the way... Will put it all together tonight and hopefully it'll finally work with Ubuntu 10.04!