Bug 506716

Summary: Smooth scrolling doesn't work on some mice
Product: [Applications] okular Reporter: Filip <filip.kendes1>
Component: generalAssignee: Okular developers <okular-devel>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version First Reported In: 25.04.3   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: showcase

Description Filip 2025-07-07 11:48:38 UTC
Created attachment 183037 [details]
showcase

SUMMARY
I have 2 mice. Razer Deathadder v3 and Logitech B100. Okular doesn't have smooth scrolling when using Razer mouse, but it does have it when using Logitech.

I daily drive Razer mouse and smooth scrolling works in other apps like Dolphin, Firefox and Brave Browser

STEPS TO REPRODUCE
1. Open some PDF
2. Enable smooth scrolling 
3. Scroll - You might need to use multiple mice to reproduce

OBSERVED RESULT
Smooth scrolling doesn't work on some mice

EXPECTED RESULT
Smooth scrolling works always

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.4-arch2-1 (64-bit)
Graphics Platform: Wayland