Thank your for your kind reply.
Unfortunately, I hardly understand what should be done.
I have no idea how to uninstall the NVIDIA stuff.
What's the command(s)? How to check if it has been done the right way?
How should that driver's "refresh" be done? What are the commands?
Which drivers should be happy? How do I know they are?
Sorry for being that ignorant. I have no Linux background.
I can imaging it may take too long to explain step be step. I don't want to steal your time. So if it's too complex, just forget about it. I can live without 3D graphics.