https://bugs.kde.org/show_bug.cgi?id=521742
Bug ID: 521742
Summary: Severe lag and stuttering on specific websites after
updating KWin to 6.7.0
Classification: Plasma
Product: kwin
Version First 6.7.0
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Description:
After updating my system, I am experiencing severe performance degradation,
lagging, and heavy stuttering when trying to browse specific websites, such as
dashboard/canvas-heavy pages (e.g., https://inquisitio.netlify.app/).
The issue is highly reproducible and completely breaks the usability of the
affected web pages under the new KWin version.
Steps to reproduce:
Log into a Plasma 6.7.0 Wayland session on a machine with Ivy Bridge Intel
integrated graphics (HD 4000).
Open any modern web browser (tested with Chromium/Firefox).
Navigate to https://inquisitio.netlify.app/
Attempt to scroll or interact with the page.
Actual Results:
The website lags massively, stuttering constantly and dropping frames to an
unusable level.
Expected Results:
The website should render and scroll smoothly at full refresh rate, as it did
on previous versions.
Additional Information & Workaround:
Downgrading only the kwin package from 6.7.0-1 back to 6.6.5-3 completely
resolves the issue, confirming that the regression is introduced in the latest
KWin release.
The system is fully updated on CachyOS running Linux Kernel 7.0.11.
System Information (Fastfetch):
OS: CachyOS x86_64
Host: 2356BQ5 (ThinkPad T430s)
Kernel: Linux 7.0.11-1-cachyos
Shell: bash 5.3.15
DE: KDE Plasma 6.7.0
WM: KWin (Wayland)
WM Theme: Breeze
CPU: Intel(R) Core(TM) i5-3320M (4) @ 3.30 GHz
GPU: Intel HD Graphics 4000 @ 1.20 GHz [Integrated]
Memory: 2.28 GiB / 7.57 GiB (30%)
Locale: hu_HU.UTF-8
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