Bug 513830

Summary:	8000Hz polling rate mice will visually lag capture rectangular region on spectacle.
Product:	[Applications] Spectacle	Reporter:	doomguyf2p
Component:	General	Assignee:	Noah Davis <noahadvs>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde, kde
Priority:	NOR
Version First Reported In:	6.5.4
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description doomguyf2p 2025-12-26 08:25:42 UTC

SUMMARY
Using a 8000Hz polling rate mouse will lag spectacle when using capture rectangular region on spectacle!

STEPS TO REPRODUCE
1. Have a mouse with 8000Hz polling rate
2. Launch spectacle
3. Attempt to capture rectangular region 

OBSERVED RESULT
The tool will become very laggy

EXPECTED RESULT
The capture window should be smooth like it is at lower polling rates

Linux: Arch Linux 
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1

ADDITIONAL INFORMATION
Using Wayland

Comment 1 doomguyf2p 2025-12-26 08:28:17 UTC

Video showcase: https://youtu.be/BXkJaQggvvo

Comment 2 David Edmundson 2025-12-26 23:06:02 UTC

This should be fixed with Qt 6.11 that batches mouse operations