I recently updated my Ubuntu to 14.04, which also resulted in the installation of kernel 18.104.22.168
Booting this kernel always resulted in a black screen, so I simply got rid of it and am now using the old one (3.5.0-17).
To install an Nvidia driver I need the Linux-header (kernel source) for the running kernel, which is part of the 12.04 repositories, but not the 14.04 ones. Does anyone know a solution for this problem - so either a fix for the new kernel or how I can install the headers? By the way: I was not able to install/boot Ubuntu 14.04 or any other newer Linux distribution from DVD; I had the same black screen problem.
I am using an Acer TravelMate 8573, if you need any other information please ask!