https://bugs.kde.org/show_bug.cgi?id=422372
--- Comment #4 from Nicolas Fella <nicolas.fe...@gmx.de> --- I think what happens is this: The first (lower) screen is processed fine. When the second screen (upper) screen is processed the geometry of the first is subtracted. This results in two region parts. An upper one, above the second screen, and a very narrow one (1 x something pixels) to the left or right of the first screen, because by pure chance the x position of the screen was 1 instead of 0. (I can give you a mediocre drawing if that helps). Both these rects are then checked for being a top screen, which is true for both, although the narrow one arguably shouldn't be considered top. Then further down in the calculation something seems to go wrong because of the very narrow rect -- You are receiving this mail because: You are watching all bug changes.