https://bugs.winehq.org/show_bug.cgi?id=37709
--- Comment #5 from Matteo Italia matteo@mitalia.net --- The gdi32-MultiMonitor patch (https://github.com/wine-compholio/wine-staging/tree/master/patches/gdi32-Mul...) does fix the problem. I read that such patch has been rejected because it doesn't fully reproduce Windows behavior, but the current status (one hardcoded monitor name for every display provided by EnumDisplayMonitors) isn't much better and breaks every application using Qt5 out there.