I had a similar question, the title entries on the boot menu are not clear. The second menu line (use tab to see the command line) passes the parameter "nomodeset" to the kernel. Your issue might be with your video card not liking the kernel-configured video in Ubuntu 10, I think you can solve your issue by booting with the second menu line and then installing your manufacturer's video driver if you need better resolution, (or to fix your black screen issue) do you have an older Nvidia card, by chance? The nomodeset parameter instructs the kernel to not load video drivers and use BIOS modes until X is started. Make sure you install your video driver from the command line before you startx. Since you are booting from a live CD, the driver install will not be persistent unless you generate a customized DVD, would suggest a HDD install (or a different video card).



