What surprised me was what it did to /etc/X11, namely:
1. the symlink /etc/X11/X was broken, rather than being made to point at /usr/X11/bin/Xorg as was done with a clean install.
2. there was no xorg.conf file created.
The output of "man Xorg" refers one to what appear to be configuration programs.... which weren't there. Looking around on the web for one such program turned up a man page saying that it ran "Xorg -configure", so I tried that, and then just ran Xorg with the option to explicitly specify the newly created configuration file.
It didn't work; the error message complained about the lack of a proper number or numeric range on the VertRefresh line. Examining that file turned up that Xorg -configure emitted a file containing something on the order of the following lines:
HorizSync 30.0 - 95.0 HorizSync 0.0 - 0.0 VertRefresh 50.0 - 0.0
I got reid of the duplicate and corrected the upper end of the VertRefresh from the XF86Config file that was fortunately left behind, and that has apparently done the trick.
James Jones
