https://bugs.kde.org/show_bug.cgi?id=434051
Bug ID: 434051
Summary: Panel freeze multiple seconds on actions
Product: plasmashell
Version: 5.21.2
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Panel
Assignee: plasma-b...@kde.org
Reporter: morisset.hug...@gmail.com
Target Milestone: 1.0
Created attachment 136429
--> https://bugs.kde.org/attachment.cgi?id=136429&action=edit
glxinfo
SUMMARY
Panel freeze multiple seconds on actions
STEPS TO REPRODUCE
1. Click any widgets on the panel
2. widget popup opens
3. panel and widget is freeze for multiple seconds
4. The freeze also happens on widget closing
OBSERVED RESULT
I have the panel's clock configured to display seconds, and can clearly see the
freeze happening.
I used perf (`perf record -o /tmp/perf --call-graph dwarf --sample-cpu --pid
$(pidof plasmashell`)
)
to see the flamegraph: https://ibb.co/BgyB7ft
So the problem seems to be with transparency and maybe a regression in libQt?
EXPECTED RESULT
Smooth usage
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: /Kde Neon
(available in About System)
KDE Plasma Version: 5.21.2
KDE Frameworks Version: 5.80.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION
Same freeze also happens with compositor disable
One CPU gets 100% usage during freeze
I've not been able to test with transparency/blur deactivated I didn't find
where the option is, if someone got this information, I'm willing to test
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