https://bugs.winehq.org/show_bug.cgi?id=38009
--- Comment #2 from Stefan Dösinger stefan@codeweavers.com --- By Wine, called by the application
I didn't spot that codepath, I came to the conclusion that xinerama_init was only called on driver load. I'll have a look.
This problem happens on the Nvidia driver (with the Xrandr 1.1 fallback) and open source drivers (with newer xrandr) fwiw.