Bug 510903

Summary:	Plasma 6.5, ContrastEffect seems to be turned on behind all transparent desktop elements
Product:	[KDE Neon] neon	Reporter:	PK <pieterkristensen>
Component:	Packages User Edition	Assignee:	Neon Bugs <neon-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	jr, neon-bugs-null
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	desktop with panel plasma 6.4 Screenshot of the desktop (with panel) from plasma 6.5 transparent konsole plasma 6.4 transparent konsole plasma 6.5 dashboard menu plasma 6.4 dashboard menu plasma 6.5

Description PK 2025-10-22 05:09:37 UTC

Yesterday I received Plasma 6.5 on my Neon User Edition machine.
All transparent desktop-elements (kwin menu's, panel, widgets, plasmoids, menu dashboard) have the "ContrastEffect" enabled behind them.
This effect could be activated before by editing the file plasmarc in het root-folder of a plasma-theme in ~/.local/share/plasma/desktopthemes/myTheme
By default it is not activated.
I don't know where the error lies (upstream? Neon-build). But it doesn't look right.

SUMMARY
ContrastEffect behind transparent desktop-elements allways active in Plasma 6.5

STEPS TO REPRODUCE
1. Start Plasma 6.5 

OBSERVED RESULT
All transparent desktop-elements have the ContrastEffect activated in their background. This makes imho the whole desktop look less fresh and crispy

EXPECTED RESULT
if the ContrastEffect is not turned on (default) is should not work

Operating System: KDE neon User Edition
KDE Plasma Version: 6.5.0
KDE Frameworks Version: 6.19.0
Qt Version: 6.9.2
Kernel Version: 6.14.0-33-generic (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-6300U CPU @ 2.40GHz
Memory: 8 GiB of RAM (7.6 GiB usable)
Graphics Processor: Intel® HD Graphics 520
Manufacturer: Dell Inc.
Product Name: Latitude 5480

ADDITIONAL INFORMATION

Comment 1 PK 2025-10-22 07:31:52 UTC

Created attachment 185988 [details]
desktop with panel plasma 6.4

This is a screenshot of the desktop (with panel) from plasma 6.4

Comment 2 PK 2025-10-22 07:33:24 UTC

Created attachment 185989 [details]
Screenshot of the desktop (with panel) from plasma 6.5

Same as above: screenshot of the desktop (with panel) but from plasma 6.5

Comment 3 PK 2025-10-22 07:35:24 UTC

Created attachment 185990 [details]
transparent konsole plasma 6.4

transparent konsole plasma 6.4

Comment 4 PK 2025-10-22 07:37:06 UTC

Created attachment 185991 [details]
transparent konsole plasma 6.5

Same as previous transparent konsole plasma but then plasma 6.5. Notice the coloration through the transparent konsole.

Comment 5 PK 2025-10-22 07:38:26 UTC

Created attachment 185992 [details]
dashboard menu plasma 6.4

Dashboard menu plasma 6.4

Comment 6 PK 2025-10-22 07:40:21 UTC

Created attachment 185993 [details]
dashboard menu plasma 6.5

dashboard menu plasma 6.5. Again the background is strangely colored imho...

Comment 7 PK 2025-10-23 17:14:56 UTC

There seems to be a bugrapport of this item https://bugs.kde.org/show_bug.cgi?id=510818

And in reddit there is an item about it https://www.reddit.com/r/kde/comments/1od8jm4/plasma_65_blur_changed_and_looks_strangewrong_was/

I don't at all recognize kde/plasma in this change. The whole thing became ugly and there is no choice.