Sorry to hear that - a desktop is not much use when vid mis-behaves (LOL - DAMHIKT)
However, should you want to try again - perhaps some clue will be found in/var/log directory ?
It (or) your home section should contain Xorg.O.log file. as well as . xorg.errors
If driver is loaded, lsmod will inform (# lsmod | grep nvidia)_
(if not, find location of the driver -try (insmod -f) or @ least modprobe "name_of_driver")
They may contain sufficient data to pin down cause of failures
Am presuming you are now using generic "vesa" or "nv" for driver section of xorg.conf ?
They are more than adequate , until 3d acceleration is desired
OTOH- if you prefer to wait for VL7 - a developer is certain to show up & answer
your original query ( if nothing else, this dialogue "bumps" the queue)
Best of luck