https://bugs.kde.org/show_bug.cgi?id=408029
Bug ID: 408029
Summary: Scrolling in evince when window does not have focus
does not work (Xinput2-related)
Product: kwin
Version: 5.14.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: p...@ralfj.de
Target Milestone: ---
SUMMARY
When scrolling in an evince window that does not have focus, nothing happens.
STEPS TO REPRODUCE
1. Open evince, make it cover half the screen.
2. Put some other window on the other half and give it focus.
3. Hover the mouse over the evince window without clicking, and turn the scroll
wheel.
OBSERVED RESULT
Nothing happens.
EXPECTED RESULT
It should scroll.
SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux 10
KDE Plasma Version: 5.14.5
Qt Version: 5.11.3
KDE Frameworks Version: 5.54.0
Kernel Version: 4.19.0-5-amd64
OS Type: 64-bit
ADDITIONAL INFORMATION
First reported against evince/GTK at
https://gitlab.gnome.org/GNOME/gtk/issues/949. However, after discovering that
setting GDK_CORE_DEVICE_EVENTS=1 in the environment works around the issue,
they concluded that this has something to do with KWin not supporting Xinput2
(?).
Curiously, when I use two-finger scrolling on my touchpad to scroll, evince
*does* scroll properly. It's only mouse wheel scrolling that gets "lost", and
only when the evince window does not have focus.
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