[mdlug] Location of xorg.conf in Ubuntu 18.04

[R Kannan]

Hello,

I recently had changed one of my two monitors and I am having a tough 
time getting new settings stick in X11/nVidia . I have to go to nVidia X 
server settings every time to reset after logging in. I have tried 
modifying /etc/X11/xorg.cof and files under /usr/share/X11/xorg.conf.d 
with no success. It always seem to go back to the original settings on 
starting X. Google seems to indicate that these are the locations for 
xorg.conf.

Any help is appreciated.

Thanks