Bug 513248

Summary:	Wishlist: Disable slow transition in Night Light
Product:	[Plasma] kwin	Reporter:	madness742
Component:	night color	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	wishlist	CC:	nate
Priority:	NOR
Version First Reported In:	6.5.3
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description madness742 2025-12-12 11:13:26 UTC

SUMMARY
It would be useful to have the option to disable the slow transition in Night Light. It makes the entire display freeze when multiple high resolution monitors are connected, and causes stutters in games.

Relevant AMD bug report: https://gitlab.freedesktop.org/drm/amd/-/issues/3708 

STEPS TO REPRODUCE
1. Connect multiple 3840x2160 displays to the same GPU.
2. Turn on Night Light.

OBSERVED RESULT
The entire display freezes while the colour is changing. It also makes games stutter when this is slowly happening if `Switching times` is set to `Sunrise and sunset`.

EXPECTED RESULT
Ideally this would be fixed in the kernel, but there's not much that can be done according to the comments on the AMD issues tracker.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 43
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
GPU: AMD Radeon RX 7900 XTX (Sapphire Nitro+)

Comment 1 Nate Graham 2025-12-12 16:17:38 UTC

Id the transition causes a problem, the solution is to fix the issue, not provide a way for people to work around it! Let's focus on the issue itself, and see if there's anything we can do in KWin until the driver bug is fixed.