I know I’m confused. I was under the impression, correctly you say, that nouveaus and nVidia divers are mutually exclusive, but then I was told, in one of the discussions about my upgrade, that nouveau was the name for the openSUSE version of the nVidia driver. I’ll dismiss that from my mind.
So I restored the blacklist and rebooted. The result was that my screen is now the wrong size for my monitor. I removed the blacklist and the screen was still the wrong size, albeit a different one. I’ve tried flipping back and forth with no success in getting the right sized screen.
In each case, the KDE display settings do not give me an option of another screen size. I’m currently using the repo version of the driver and will continue to do so.
The current screen size is pretty unusable, so we’re back to my original question: how do I set the screen size for the right one for my monitor?