Bug 503506

Summary: With NVIDIA GPU, the default Color-scheme-following Plasma Breeze style Makes Audio Volume widget's popup take much longer to open
Product: [Plasma] plasmashell Reporter: Rotlug <rotlug77>
Component: Audio Volume widgetAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal CC: isma.af, kde, kdedev, nate, strong.drum0546, uhhadd
Priority: NOR    
Version First Reported In: 6.3.4   
Target Milestone: 1.0   
Platform: NixOS   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Rotlug 2025-04-29 08:01:23 UTC
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SUMMARY
When using the breeze plasma style, specifically the one that follows the color scheme, system tray dialogs (for example the network, audio dialogs etc.) take much longer to appear compared to other plasma styles.

STEPS TO REPRODUCE
1. Switch to Breeze (Follows color scheme)
2. Try to open Audio Volume dialog

OBSERVED RESULT
Dialog takes a few seconds to open

EXPECTED RESULT
Dialog should open instantly

SOFTWARE/OS VERSIONS
Operating System: NixOS 25.05
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.0
Kernel Version: 6.14.2 (64-bit)
Graphics Platform: Wayland
Processors: 6 × AMD Ryzen 5 3500X 6-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1660 SUPER

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2025-04-29 14:06:05 UTC
I can't reproduce this; clicking on any system tray icons opens their popups instantly no matter which Plasma theme I'm using. I've got everything built from git master on top of Fedora KDE 41, an AMD GPU, and Qt 6.8.2

Could be a local config issue, or a GPU driver issue (I see you're using NVIDIA: my condolences), or a Qt 6.9 thing, or something else.

First let's try to rule out a local config issue. Can you create a new user account on the same machine, log into it, and then reproduce the problem with the Breeze (follows color scheme) theme applied?
Comment 2 Rotlug 2025-04-29 16:08:08 UTC
I Just made a new user and i can still reproduce the issue.
Comment 3 Nate Graham 2025-04-29 16:24:09 UTC
Ok, so not configuration. Could be NVIDIA, could be Qt 6.9, could be something else.

Is the issue seen with other Plasma styles the follow the color scheme? Or only with Breeze? An example is Utterly-Round.

Also, does the issue only affect System Tray popups, or all panel popups? E.g. the one for the Kickoff Application Launcher.
Comment 4 Rotlug 2025-04-29 16:30:55 UTC
After following your instructions i noticed that the issue only affects the Audio Volume popup and not all panel/system tray popups.
The issue also happens in utterly-round, by the way.
Comment 5 Nate Graham 2025-04-29 16:32:25 UTC
Interesting. I wonder what that widget is doing. Off the top of my head, it does have some custom drawing the for volume sliders which could perhaps be related.
Comment 6 TraceyC 2025-04-29 17:02:07 UTC
I am able to reproduce this on git-master on top of Solus using the original test steps, nvidia gpu
On my system, there is not a huge delay opening the systray sound applet, but it is noticeable compared to other themes


❯ kinfo
Operating System: Solus 4.7
KDE Plasma Version: 6.3.80
KDE Frameworks Version: 6.14.0
Qt Version: 6.8.3
Kernel Version: 6.14.4-318.current (64-bit)
Graphics Platform: Wayland
Processors: 16 × 11th Gen Intel® Core™ i7-11800H @ 2.30GHz
Memory: 64 GiB of RAM (62.5 GiB usable)
Graphics Processor 1: Intel® UHD Graphics
Graphics Processor 2: NVIDIA GeForce RTX 3060 Laptop GPU

nvidia driver 570.144
Comment 7 Nate Graham 2025-04-29 17:03:57 UTC
Dang, so it's NVIDIA.
Comment 8 Lenzoid 2025-05-10 20:52:24 UTC
Can't reproduce it, also Nvidia here but beta drivers.

System Information: 
Operating System: Arch Linux 
KDE Plasma Version: 6.3.80
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel Version: 6.14.2-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5700X3D 8-Core Processor
Memory: 32 GiB of RAM (31.3 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 2070 SUPER
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7B85
System Version: 1.0
nvidia-open-dkms-beta 575.51.02
Comment 9 Nate Graham 2025-10-23 18:19:02 UTC
Forward-duping to Bug 510886 since that one has a bunch of debugging in it.

*** This bug has been marked as a duplicate of bug 510886 ***