[okular] [Bug 421634] Presentation mode misrendering with two monitors and screen scaling

[Oliver Sander]

https://bugs.kde.org/show_bug.cgi?id=421634

--- Comment #5 from Oliver Sander <oliver.sander at tu-dresden.de> ---
I confirm that the problem goes away when I set QT_SCALE_FACTOR instead of
QT_SCREEN_SCALE_FACTORS.  However, I don't usually set these variables per
hand.  Rather, I use the slider in the control center, and that set
QT_SCREEN_SCALE_FACTORS for me, not the other one.

> Does this mean we'll have to replace QDesktopWidget in presentationwidget.cpp anyway?

I guess, maybe for the transition to Qt6.  Doesn't look very difficult, though.

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