https://bugs.kde.org/show_bug.cgi?id=420492
Bug ID: 420492
Summary: 20.04.0 significantly slows down mouse scrolling
Product: okular
Version: 20.04.0
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: okular-de...@kde.org
Reporter: dragonrmar...@gmail.com
Target Milestone: ---
SUMMARY
20.04.0 update breaks fast scrolling in Okular. Most noticeable with a
"hyperscroll" mouse wheel.
STEPS TO REPRODUCE
1. open any PDF or EPub file in 20.04.0
2a. with a hyperscroll mouse, free scroll the mouse wheel inside the document
panel
2b. with a normal mouse, scroll as fast as possible inside the document window
3. downgrade to 1.9.3 and repeat step 2
OBSERVED RESULT
Scrolling the same amount of clicks scrolls down less lines in 20.04.0 compared
to 1.9.3. Scrolling with a hyperscroll wheel significantly limits the speed of
scrolling to make free scrolling unusable. This bug is only observed when
scrolling in the document panel. Scrolling in the navigation panel or in the
scrollbar on the right produces the expected scroll speed.
EXPECTED RESULT
The scroll speed in the document panel is as fast as in the other panels and
keeps the same speed as 1.9.3
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.18.4.1-1
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.2 (built against 5.14.2)
ADDITIONAL INFORMATION
Mouse: Logitech G502 with free scroll
also tested with a generic mouse with normal scroll wheel
videos of the scrolling attached:
https://youtu.be/wIts9r-meME
https://youtu.be/nfDjuFkjQLE
--
You are receiving this mail because:
You are watching all bug changes.
