One sojourner's story... With my ATI Xpert98 card and "no-name" monitor (it had "ICON" on the front bezel, but that's all I could find out) I had to constantly play XF86Setup. But I did get things to work.
Finally, after about the third clean install I took careful notes along the way too since when we get into these situations we often "thrash" get things working and then can't remember what we did! I need to make a note that I did quite a few installs on purpose as I was trying different things out with disks and disk partitions and the like. What blew me away the first time I experienced it was the fact that the resolution that the Xserver would "allow" me to use very dependent on the monitor that I selected! Recently I got an AOpen F50L LCD screen. That helped a bit as I had some specs. Then I wanted to build a new machine so while I was at it I picked up a Matrox M200 for $49. When I did the (new) install of Potato from CDs I couldn't believe it. For the first time ever Anxious came up!! It had never detected my ATI card, but was happy with the Matrox. X can seem a bit nasty, but it can be made to work. Course it's nice to get a good soft pillow to put between your head and the wall! It's nice to have some brains left to enjoy *using* the system once you get it configured! I apologize that there is so little advice here - other than spending $50 or so for a supported card. Perhaps the "you are not alone" factor will relieve some of the pain. My system is now stable, enjoyable and becoming more and more of a work horse for me. Cheers, -rick