[okular] [Bug 421780] Most ways of scrolling a document not working (Qt 5.15)

[David Hurka]

https://bugs.kde.org/show_bug.cgi?id=421780

David Hurka <david.hurka at mailbox.org> changed:

           What    |Removed                     |Added
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             Status|CONFIRMED                   |NEEDSINFO
         Resolution|---                         |WAITINGFORINFO

--- Comment #14 from David Hurka <david.hurka at mailbox.org> ---
Bernhard and abulhair seem to be the only ones who stated to have this problem.

@Nate, you confirmed this bug, how did you reproduce it?

@Bernhard, you seem to be able to compile Okular. Can you run the autotests and
post the results? Maybe that gives us some insight.

Additionally, can you run the autotests provided in
https://bugreports.qt.io/browse/QTBUG-88249 (and maybe
https://bugreports.qt.io/browse/QTBUG-88249 )? These are not made for this
problem, but AFAIR do some debugging output on QScroller.

Additionally, can you check whether the problem persists if you uncheck “Use
smooth scrolling” in the config dialog?

A guess on the problem source: QScroller internally relies on QScreen
properties. If your physical screen reports some very wrong properties,
QScroller doesn’t work.

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