'Server with GUI' Failing After NVIDIA Driver Install

Hello,

I am trying to install NVIDIA graphics drivers 390.59 on my RHEL-7.5 dell laptop. After installing them, the laptop fails to boot. It gets to the gray background screen after the spinning wheel but then freezes. After modifying the xorg.conf file I have eliminated all of the errors in xorg.0.log, but it still does not boot (there are some warnings that I cannot work out how to eliminate).

Can anyone please suggest what else I can investigate to find out what is preventing the GUI from booting properly? I do not know which other logs might show the failure.

Thanks!