Bug 482861

Summary:	Overview FPS drop animation
Product:	[Plasma] kwin	Reporter:	Sauf <hsaom>
Component:	effects-overview	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	CONFIRMED ---
Severity:	normal	CC:	elizabethj1167, indigosky30, nate, sephiroth_pk, shatz.dan
Priority:	NOR	Keywords:	qt6
Version First Reported In:	6.0.1
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Sauf 2024-03-08 11:57:26 UTC

SUMMARY
I've been using KDE Plasma for the past six months. Overall, the animations look good, but every time I use the overview effect, I experience laggy animations and FPS drops. I've updated to KDE 6, and even with the new overview design, the issue persists.

STEPS TO REPRODUCE
1. Login
2. Trigger overview effect using screen edge or META+W shortcut
3. lower FPS than normal and feeling laggy

OBSERVED RESULT
FPS drops notably than normal usage of plasma

EXPECTED RESULT
Overview desktop effect 144/60 fps and no fps drop/"feeling laggy"

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
(available in About System)
Kernel Version: 6.7.8-zen1-1-zen (64-bit)
KDE Plasma Version: 6.0.1
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION
using both 60hz and 144hz issue persist. in 60hz FPS drops to 38 and in 144hz FPS drops to 117.

Comment 1 Sauf 2024-03-08 12:04:24 UTC

Hardware
AMD Ryzen 5 5600H
16 GB
AMD Radeon RX 6600M Graphics

Comment 2 Bug Janitor Service 2024-03-08 13:53:27 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/5390

Comment 3 Zamundaaa 2024-03-26 16:14:44 UTC

Git commit d59451adcf8f7a4d90659a60bfbe73230091b0e3 by Xaver Hugl.
Committed on 26/03/2024 at 16:06.
Pushed by zamundaaa into branch 'master'.

effects/quickeffect: render qtquick scenes in the normal render pass

If they're rendered in prePaintScreen, the time needed to render them is not
accounted for in compositing scheduling, which may make KWin miss vblank
Related: bug 452119, bug 482034

M  +5    -0    src/effect/offscreenquickview.cpp
M  +9    -10   src/effect/quickeffect.cpp

https://invent.kde.org/plasma/kwin/-/commit/d59451adcf8f7a4d90659a60bfbe73230091b0e3

Comment 4 Axel 2024-07-03 00:20:34 UTC

(In reply to Zamundaaa from comment #3)
> Git commit d59451adcf8f7a4d90659a60bfbe73230091b0e3 by Xaver Hugl.
> Committed on 26/03/2024 at 16:06.
> Pushed by zamundaaa into branch 'master'.
> 
> effects/quickeffect: render qtquick scenes in the normal render pass
> 
> If they're rendered in prePaintScreen, the time needed to render them is not
> accounted for in compositing scheduling, which may make KWin miss vblank
> Related: bug 452119, bug 482034
> 
> M  +5    -0    src/effect/offscreenquickview.cpp
> M  +9    -10   src/effect/quickeffect.cpp
> 
> https://invent.kde.org/plasma/kwin/-/commit/
> d59451adcf8f7a4d90659a60bfbe73230091b0e3

Shouldnt this bug be closed since the merge request was accepted and the other 2 related bugs are RESOLVED?

Comment 5 shatz.dan 2025-02-11 12:17:14 UTC

I'm noticing the same but only the first opening overview on a fresh session. Every next animation is smooth.
I'm opening overview using touchpad gestures if that matters.

AMD gpu, 120hz in-built laptop display.

Comment 6 Riccardo Robecchi 2025-08-27 16:24:29 UTC

I still experience this bug. In my case, the screen freezes for a couple of seconds, and then moves at sluggish speed until the animation is completed.

Linux/KDE Plarma: Endeavour OS
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1

Hardware: Intel Core i5-8250U with Intel UHD Graphics 620 GPU, connected to a 2560x1440 and a 1920x1080 external monitors (the latter mirroring the laptop's monitor).