https://bugs.kde.org/show_bug.cgi?id=489448
Noah Davis <noaha...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|WAITINGFORINFO |---
Ever confirmed|0 |1
Status|NEEDSINFO |CONFIRMED
--- Comment #6 from Noah Davis <noaha...@gmail.com> ---
It seems that you don't use fractional scaling or any scaling besides 100%, so
I suppose we can rule out fractional scaling being the issue. The magnifier
actually magnifies by 3x, so in theory there should be no problem, but that is
clearly not the case.
I've reproduced the bug on my own system with all screens set to 100% scale.
Curiously, the bug only happens in an obvious way when I'm moving the cursor
with my touchpad. The touchpad has a higher resolution for detecting movement
than my Logitech MX Master 3 mouse does. It seems that in the past, mouse
movement was provided in a more predictable way that mapped more closely to how
you actually see the cursor move. I measured the mouse positions for movement
on my touchpad and mouse and it turns out that mouse positions can now have
weird fractional values like (871.352,402.797). The touchpad and mouse both
have this issue, but it's much worse with the touchpad.
Perhaps this is some kind of Qt or KWin bug? If it's new intentional behavior,
I suppose we'll have to manually adjust the mouse positions we receive to
prevent the issue this bug is reporting.
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