Sorry to not be clear, my problem is Scintilla in Geany updating slowly
Interesting. So @elextr, do you consistently have the same problem as me - typing lag in editor?
What desktop are you using? - that would help explain why it has to do with fullscreen. On my GNOME, fullscreen does not seem to be a factor in this. And what fullscreen do you mean? Do you refer to *maximized* (as in window) or actual fullscreen, accessed via F11?