Well, as always, it seems that Cubase and HiDpi do not go hand in hand. When opening some plugins and having the GUI focused, Cubase becomes slow and clumsy, and the channel measurement becomes unusable. In addition to other scaling problems in general, some GUIs lose definition, but that is already a matter of 3rd parties, which from my side has been reported.
The case is that with my problem in question it seems that it only happens on the main screen of the laptop (3840x2160). In the second one with FullHD resolution it does not happen.
Question, Is there a solution for this in Nvidia settings?
Data: Nvidia Quadro P2000, Studio Controller, latest available.