Description of problem: Tylersburg HEDT, BIOS SO1325. Graphic: nVidia GeForce 9800 GX2 (rev a2). RHEL5.3 Beta GUI installation crash when start X windows, it appear at both x86_64 and i386. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. Insert RHEL5.3 Beta disk to CDROM 2. Boot to install with graphic mode 3. System crash at detect nVidia graphic and start X windows. Actual results: The display has no any output. Expected results: Additional info: