(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!
(EE) NVIDIA(0): *** Aborting ***
(II) UnloadModule: "nvidia"
(II) UnloadModule: "vgahw"
The Faq is your friend ;-)
Q: My X server fails to start, and my XFree86 log file contains the error:
"(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!"
A: Nothing will work if the NVIDIA kernel module doesn't function
properly. If you see anything in the X log file like "(EE)
NVIDIA(0): Failed to initialize the NVIDIA kernel module!" then
there is most likely a problem with the NVIDIA kernel module.
First, you should verify that if you installed from rpm that
the rpm was built specifically for the kernel you are using.
You should also check that the module is loaded ('/sbin/lsmod');
if it is not loaded try loading it explicitly with 'insmod' or
'modprobe' (be sure to exit the X server before installing a new
kernel module). If you receive errors about unresolved symbols,
then the kernel module has most likely been built using header files
for a different kernel revision than what you are running. You can
explicitly control what kernel header files are used when building
the NVIDIA kernel module with the --kernel-include-dir option (see
`sh NVIDIA-Linux-x86-1.0-4496-pkg1.run --advanced-options`
and so on...