Should install OpenGL via cuda package?

I want to know what is the consequence of not installing OpenGL via the cuda package? I mean, if I install the driver and toolkit on an Ubuntu, will opengl softwares use GPU or not?

Currently, I have installed cuda-10 driver and toolkit (without opengl) on Ubuntu 18.04 while nouveau has been blacklisted. However, when I run glmark2 [1] programs, no process is offloaded on GPU and I see 300% PCU usage.

On the other hand, I remember that when I installed opengl via cuda package, I had some problems with the display. For example, high cpu usage and other things.

So, I would like to know what is the recommendation of Nvidia for Ubuntu regarding opengl?

[1] https://github.com/glmark2/glmark2

correct, if you don’t install the OpenGL libraries bundled with the NVIDIA GPU driver installer, then OpenGL apps won’t use the GPU.