Bug 512668 - Dragging icons very laggy and sometimes fails
Summary: Dragging icons very laggy and sometimes fails
Status: REPORTED
Alias: None
Product: plasmashell
Classification: Plasma
Component: Task Manager and Icons-Only Task Manager widgets (other bugs)
Version First Reported In: 6.5.0
Platform: Other Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-11-27 09:55 UTC by pallaswept
Modified: 2025-12-11 17:51 UTC (History)
2 users (show)

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Description pallaswept 2025-11-27 09:55:54 UTC 
SUMMARY

Since Plasma 6.5, I have noticed that when I drag icons in the icons and text task manager, it is very laggy, and fails sometimes. It's as though it's only updating every 500ms or so. I have confirmed this with a new user account.

STEPS TO REPRODUCE
1. Open several apps
2. Click and drag one of them to move it. Move fast for better reproduction

OBSERVED RESULT
Icon lags behind the mouse cursor. When stopping the cursor, sometimes the icon is left behind. Moving the cursor again by 1 px will cause the icon to 'catch up'.

EXPECTED RESULT
Icon stays below the cursor

SOFTWARE/OS VERSIONS
> kinfo
Operating System: openSUSE Tumbleweed 20251125
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
Kernel Version: 6.17.8-2-default (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 32 GiB of RAM (31.2 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 3090

ADDITIONAL INFORMATION