With Xubuntu 19.04 Disco Dingo and the 418.56 nvidia drivers it appears now my system has:
/usr/lib/x86_64-linux-gnu/nvidia-418/xorg
So added the below options to /etc/X11/xorg.conf fixes the issue:
Section "Files" ModulePath "/usr/lib/x86_64-linux-gnu/nvidia-418/xorg" ModulePath "/usr/lib/xorg/modules" EndSection
I'm not sure why the file/folder structure differed with Xubuntu 18.10 and 415.xx nvidia drivers.
With Xubuntu 19.04 Disco Dingo and the 418.56 nvidia drivers it appears now my system has:
/usr/lib/ x86_64- linux-gnu/ nvidia- 418/xorg
So added the below options to /etc/X11/xorg.conf fixes the issue:
Section "Files" x86_64- linux-gnu/ nvidia- 418/xorg" xorg/modules"
ModulePath "/usr/lib/
ModulePath "/usr/lib/
EndSection
I'm not sure why the file/folder structure differed with Xubuntu 18.10 and 415.xx nvidia drivers.