Gnome hangs with NVidia driver in F18

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http://forums.fedoraforum.org – I'm attempting to install F18 to my old Dell Dimension 4100 computer. With a fresh install, the gnome desktop appears with a display that is unreadable. The system responds to commands, but the printing in terminals and in menus is mostly blank with occasional colors in some of the character positions. I attributed this to the fact that nouveau is not a perfect driver for nvidia. I have had some minor problems with past installs of F16 and F17, but was able to resolve those by changing the display mode. Based on the above, I installed the nvidia drivers, following mainly the procedure d (HowTos)