Bug 514529

Summary:	The "Show FPS" effect is missing from system settings
Product:	[Applications] systemsettings	Reporter:	Valeri <v19930312>
Component:	kcm_kwineffects	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	normal	CC:	kde, plasma-bugs-null
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	CachyOS
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Valeri 2026-01-13 10:16:33 UTC

SUMMARY
The "Show FPS" effect is missing from desktop effects settings.

STEPS TO REPRODUCE
1. Open system settings
2. Navigate to window management -> desktop effects page

OBSERVED RESULT
The "Show FPS" effect is listed and can be toggled on and off.

EXPECTED RESULT
There's no entry for the "Show FPS" effect.

SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux 
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.5-2-cachyos (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION
The effect can still be manually turned on or off, either by editing kwinrc and restarting or by using KWin's D-Bus interface.

Comment 1 David Edmundson 2026-01-13 11:56:24 UTC

This was deliberately hidden as being a developer tool. 

It can also be activated through the UI from the kwin debug console.

Comment 2 Valeri 2026-01-13 12:30:23 UTC

(In reply to David Edmundson from comment #1)
> This was deliberately hidden as being a developer tool. 
> 
> It can also be activated through the UI from the kwin debug console.

I see. I've found it to be a very useful tool for checking if VRR is working or not, so perhaps a separate VRR indicator effect could be added? I know some screens have it as a built-in option, but that's not a thing on laptops.
In conjuction with VRR it's also nice to check if Nvidia Smooth Motion is working (MangoHud does not reflect its effects), but that's probably a sufficiently niche use case for KWin to not worry about it.