https://bugs.kde.org/show_bug.cgi?id=514990
Bug ID: 514990
Summary: Scrolling any type of document fast using the scroll
wheel causes severe stuttering
Classification: Applications
Product: okular
Version First 25.12.1
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
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.
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