Bug 466227

Summary: Blur effect with TV Glitch [Burn-My-Windows] effect behaves differently after updating to KDE Plasma 5.27
Product: [Plasma] kwin Reporter: c4expl0s
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: CONFIRMED ---    
Severity: normal CC: nate, trm109, xaver.hugl
Priority: NOR Keywords: regression
Version First Reported In: 5.27.1   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Sample video of the bug in action.
Screenshot of the visual bug occurring on a 'Thumbnail Grid' task switcher.
Kvantum config that might be helpful to reproduce the bug

Description c4expl0s 2023-02-22 03:23:01 UTC
Created attachment 156584 [details]
Sample video of the bug in action.

SUMMARY
Prior to updating KDE Plasma to 5.27, when the desktop effect "TV Glitch [Burn-My-Windows]" (downloaded from the KDE Store) animates a window opening, blur effect is not applied until the TV Glitch animation ends. But now, I can see a blur square while TV Glitch is animating. Same with when a window closes, I can now see the blur effect while the TV Glitch effect for closing a window is animating. This effectively puts a square blurred box behind the animation, which was not present before updating.

This bug is also present alongside the effects "TV Effect [Burn-My-Windows]" and "Glitch [Burn-My-Windows]".

STEPS TO REPRODUCE
1. Open System Settings
2. Go to Workspace Behavior > Desktop Effects
3. Check "Blur" and select "TV Glitch [Burn-My-Windows]" as the Window Open/Close Animation.
4. Open/Close any window to see blur coincide with TV Glitch animation (Which was not the case prior to KDE Plasma 5.27)


OBSERVED RESULT
- Blur square behind TV Glitch animation when opening or closing a window.

EXPECTED RESULT
- Blur effect applied after TV Glitch animation ends when opening a window. Blur effect disappears before TV Glitch animation starts when closing a window.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Garuda Linux x86_64 2.6.15-1
KDE Plasma Version: 5.27.1
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Comment 1 c4expl0s 2023-02-27 11:16:13 UTC
Hello, please note that I have already reported this issue on Burn-My-Windows' Github page, but the developers there believe this might be a KWin issue.

Thank you!
Comment 2 saik 2023-03-29 18:53:17 UTC
Created attachment 157701 [details]
Screenshot of the visual bug occurring on a 'Thumbnail Grid' task switcher.
Comment 3 saik 2023-03-29 18:55:16 UTC
I've attached what I assume is the same bug occurring on my device.

The task switcher, for the first second(ish), displays as a blurred grey box. After a second, it 'loads in' and looks normal.

This only occurs when:
1. Using plasma wayland
2. 'Visualization' for task switchers is on.
3. Using a Burn My Windows 'Window Open/Close Animation' desktop effect.
Comment 4 astroangelfish 2025-02-09 14:23:26 UTC
Created attachment 178093 [details]
Kvantum config that might be helpful to reproduce the bug

Also reproducible with Kvantum and Blur glassy global theme (https://store.kde.org/p/2138237)  with wayland. If my memory did not go wrong, could also be reproducible in X11.

My environment:

Operating System: Arch Linux 
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
Kernel Version: 6.13.1-arch2-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i5-10400 CPU @ 2.90GHz
Memory: 62.6 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 630
Manufacturer: HASEE Computer
Product Name: NKx0Sx