Means to disable the integrated graphics

hello, I think I have installed nvidia driver of GF117M [GeForce 610M/710M/810M/820M / GT 620M/625M/630M/720M] in my laptop with linux Centos 8. But when I start the application “NVIDIA-x Server Settings” I got this massage: “You do not appear to be using NVIDIA X driver. Please edit X configuration file (just run 'nvidia-xconfig), and restart X server”. Definitely I run nvidia-xconfing, but I do not know what else to do. I have Optimus and I read on the website nvidia that I need "means to disable the integrated graphics"n Thanks for helping and sorry for my ignorance

Disabling the integrated is only possible if the notebook has a hardware mux (rare) and has an option in bios for it.
Oherwise, you’ll have to set up PRIME:

I installed Ubuntu, everything was fine, thanks anyway