Bug 468578

Summary: Desktop Grid is extremely slow when using Lightly app theme
Product: [Plasma] kwin Reporter: marleydq <busvollmitaffe>
Component: effects-desktop-gridAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DOWNSTREAM    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 5.27.4   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description marleydq 2023-04-16 15:28:32 UTC 
SUMMARY
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STEPS TO REPRODUCE
1. Creating two rows of virtual desktops
2.  Using Desktop Grid effect

OBSERVED RESULT
The animation is extremely slow of this effect in particular. Observer works fine albeit slightly slow as well, but nowhere close to as laggy as Grid

EXPECTED RESULT
Before I installed Linux I had used Ubuntu 22.04 and used the feature there and it was extremely fast then. 

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2023-04-17 16:51:49 UTC 
Can you be more specific about what exactly is slow? Is the opening/closing animation? And is it slow, or is it choppy? Or both?
Comment 2 marleydq 2023-04-17 17:11:45 UTC 
(In reply to Nate Graham from comment #1)
> Can you be more specific about what exactly is slow? Is the opening/closing
> animation? And is it slow, or is it choppy? Or both?

https://imgur.com/a/EVP3icF

I made a video. First, I use the overview function to show that it works... okay-ish. It works better than how it did on Kubuntu 22.04. Afterwards, I show Grid and it works a lot worse and is extremely choppy, even though it worked fine in Kubuntu 22.04. It might have something to do with some transparency options.

Edit: I actually realized that this is an issue with the Lightly Plasma theme, not with Kwin. When I change the theme to Breeze it works flawlessly again. Although it is strange considering I used Lightly Plasma in Kubuntu as well and it was fine there, this is probably not an issue with Plasma itself but rather with the custom theme breaking it. You can close this ticket.
Comment 3 Nate Graham 2023-04-18 04:30:23 UTC 
Oh ok, cool!