https://bugs.kde.org/show_bug.cgi?id=466551
Bug ID: 466551
Summary: Increased CPU consumption when you scroll through task
applet
Classification: Plasma
Product: kwin
Version: 5.27.1
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: gudvinr+...@gmail.com
Target Milestone: ---
Created attachment 156800
--> https://bugs.kde.org/attachment.cgi?id=156800&action=edit
load
SUMMARY
If I scroll through all open apps on panel, ALL apps that I scroll through
start consuming significant amount of CPU (around 10% each). Load drops to zero
when all apps idling.
It virtually doesn't matter if I use it with KDE apps or not (e.g. I tested
with firefox, systemmanager and dolphin open). kwin process also gets some load
here too. So I suspect that wayland is the culprit here. And since diverse set
of apps starts to behave in a same way I have some doubts that firefox,
systemmanager and dolphin all have same bug at the same time. Well, it could be
wayland-client bug still but that's out of scope of what I am able to debug.
STEPS TO REPRODUCE
1. Open some apps
2. Scroll through tasks rapidly using task applet
OBSERVED RESULT
Significant CPU usage for all apps involved
EXPECTED RESULT
Something more moderate I guess?
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.1
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.12-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX Vega M GL Graphics
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