Still trying to get it running. Updated CentOS 7, ATI video card, trying to use the radeon driver, and, using the previous kernel, X appears to come up, but gdm fails; with the 514 kernel, X fails to start. And here's a twist: I just rebooted, with radeon.modeset=1 on the kernel line... and for no reason I know of, I get *six* logs, Xorg.[0-5].log. Does this suggest anything to anyone? I can't imagine it's trying to start X six times.... mark