Bug 514990 - Scrolling any type of document quickly using the scroll wheel causes severe stuttering
Summary: Scrolling any type of document quickly using the scroll wheel causes severe s...
Status: REPORTED
Alias: None
Product: okular
Classification: Applications
Component: general (other bugs)
Version First Reported In: 25.12.1
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-01-23 21:04 UTC by pvpdmail
Modified: 2026-01-23 21:04 UTC (History)
0 users

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Description pvpdmail 2026-01-23 21:04:05 UTC
SUMMARY
When using the scroll wheel to scroll fast over a document, there is severe stuttering (to the point of freezing) to the application. When dragging the document at the same or faster speeds with a mouse there is no such stuttering. When scrolling with a touch pad (KDE connect remote input) there was also no such stuttering. The stuttering is not followed or caused by abnormally high CPU/GPU or disk usage.

STEPS TO REPRODUCE
1. Scroll as fast as you can with a scroll wheel

OBSERVED RESULT
Document of any kind stutters or freezes

EXPECTED RESULT
Smooth scrolling experience

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.6-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 16 GiB of RAM (15.5 GiB usable)
Graphics Processor: AMD Radeon RX 6700 XT

ADDITIONAL INFORMATION
This has been an issue for a long time; ie I can't recall of a release where this didn't exist. Free-spinning scroll wheels are affected the most by this issue for obvious reasons. Touch pads seem to be unaffected, but I could only test with KDE connect, so take it with a grain of salt.  I can attach a screen recording of the stuttering if requested.