Hello,
We may guess from the screenshot you are using ROME but please try to provide as much informations as possible.
See also How to get better results when posting about problems
The first question then coming to mind would be is your system fully updated?
How to update OpenMandriva system
We are sorry that you are encountering such problem.
IMHO we can admit that to deal with nvidia on OpenMandriva might be bit more tricky experience mainly because just a few (if not none) of our developers own nvidia graphic, so basically we have to rely on user’s feedbacks and bug reports.
Among them there are some that did not experience any issue however.