Bug 499458 - Screen motion is laggy when scrolling really fast
Summary: Screen motion is laggy when scrolling really fast
Status: REPORTED
Alias: None
Product: okular
Classification: Applications
Component: PDF backend (other bugs)
Version First Reported In: 23.08.1
Platform: Microsoft Windows Microsoft Windows
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-02-03 12:05 UTC by jpotapski
Modified: 2025-02-03 12:05 UTC (History)
0 users

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Description jpotapski 2025-02-03 12:05:17 UTC 
SUMMARY
When scrolling really fast in Okular PDF view, the screen moves much slower than it should.


STEPS TO REPRODUCE
1. Have a mouse with a free floating scroll wheel (Logitech G502).
2. Flick the mouse wheel to scroll a few pages at a time.


OBSERVED RESULT
Screen moves slower than if you were to scroll normally and/or is really laggy.


EXPECTED RESULT
The screen movement should be directly correlated to the mouse wheel movement.


SOFTWARE/OS VERSIONS
Windows: Windows 11 Pro
Version:	24H2
Installed on:	‎06/‎11/‎2024
OS build:	26100.3037
Experience:	Windows Feature Experience Pack 1000.26100.48.0


ADDITIONAL INFORMATION
Here's a video comparing Okular to Google Chrome's PDF viewer. Both times I'm using the same mouse wheel motion:
https://youtu.be/GRwFyHp-nco