nvidia-driver rebooting machine on X startup

[falz]

> Maybe someone can build a WITNESS/DDB kernel, since dumping seems to be
> failing?

I compiled these options in last night, but I'm afraid I'm not quite
sure what special steps I need to do to utilize those options, if any.
I built that kernel, booted into it, started xorg with the nvidia
driver, it immediately reboots just as it did before.

Something else that's odd that just started happening that's similar
to the original poster- their xorg.conf was being truncated to zero
bytes. Mine somehow gets changed to what appears to be a different
version. The bottom line in it is about 20 "U"s, and the 'Driver
"nvidia"' lines I added were gone. I have several xorg.conf files
named other things, but none have these characteristics.

--falz