[CentOS] Problems with CentOS 7 and X w/ nvidia

Ok, here's a bit more on the issues: I see in Xorg.0.log that it appears
to have loaded the NVidia drivers I built from proprietary. But, and this
may, or may not be significant, the user's home directory is, of course,
NFS mounted.

And his old machine that dies was running CentOS 5.

Is it possible that some of the gnome settings are breaking things with
CentOS 7's default gnome? If so, what kinds of things should I be looking
for?

        mark