Bug 499962

Summary:	Programs using Chromium failed to perform Toggle Present Windows
Product:	[Plasma] kwin	Reporter:	duandongyi2019
Component:	effects-window-management	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	cwo.kde
Priority:	NOR
Version First Reported In:	6.3.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description duandongyi2019 2025-02-13 07:37:20 UTC

SUMMARY

Programs using Chromium, such as Chrome and VSCode, experience issues when using "Toggle Present Windows" under Wayland and screen scaling mode. These issues include failure to function, severe frame drops, and stuttering.

STEPS TO REPRODUCE
1.  Open a Chrome or vscode in wayland
2.  Press Ctrl + F10

OBSERVED RESULT
Sometimes failure to function, Sometimes severe frame drops

EXPECTED RESULT
Works same as KDE plasma 6.2.5

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma:  6.3.0
KDE Plasma Version:  6.3.0
KDE Frameworks Version: 
Qt Version:  6.8.2

ADDITIONAL INFORMATION
Launch app in xwayland mode does not make it functions too

Comment 1 duandongyi2019 2025-02-13 07:55:04 UTC

KDE Frameworks Version is 6.10.0
If you need anything else please let me know

Comment 2 duandongyi2019 2025-02-13 07:57:57 UTC

After setting the screen from 1080p/125% and 4K/200% to 1080p/100% and 4K/100%, it works properly.

Comment 3 duandongyi2019 2025-02-17 07:18:54 UTC

Correction: This issue occurs if and only if a 4K display is set to a resolution and scaling of 200% or higher.

Comment 4 duandongyi2019 2025-02-17 07:29:37 UTC

And if i disable all other displays but the 4k/200%, It works properly

Comment 5 duandongyi2019 2025-02-17 07:59:21 UTC

Oh I figue it out! Turn off the night light mode will make it works properly even with 4k/200% with two 1080p / 125% display, The night light mode is the trigger

Comment 6 cwo 2025-02-17 10:50:25 UTC

If it is fixed by turning off Night Light, I would guess it's the same cause as bug 499987; see also bug 500021 where turning off Night Light improved performance.

This should be fixed in 6.3.1, releasing tomorrow, so please reopen if it still happens after you upgrade to that version.

*** This bug has been marked as a duplicate of bug 499987 ***

Comment 7 duandongyi2019 2025-02-19 02:02:26 UTC

Yes, This bug is fixed in 6.3.1, Thanks.