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Description of problem: Redhat 9 (from the ISO) only displays part of the screen on my Dell, which the probe says has a GeForce 2 MX (generic) and a NEC LCD1830. The bottom half of the image appears in the top half of my LCD, and the bottom half is blank. Booting "linux lowres" does display correctly.
We do not support probing LCD sizes, so sometimes it is necessary to override the defaults using the 'lowres' or 'resolution=<width>x<height>' command line. These are documented for exactly this case. There are not plans to support probing LCDs at this time.
It's fine to not probe LCDs. It's not fine to expect expert users to have to read the paper docs every time they install Redhat -- it's easy to add information into the 1st stage of booting saying that LCD users should use the "lowres" option. By the way, I did look in the manual, and the troubleshooting guide says nothing about all LCDs needing lowres. There is also no "What's different about installing this version of Redhat" section. I took a survey of my friends in the office, and all of them said they had never read the installation guide before -- installation always just worked, and they considered that to be a great feature of Redhat.