https://bugs.kde.org/show_bug.cgi?id=421014
Bug ID: 421014
Summary: Plasma shell suddenly freezes
Product: plasmashell
Version: 5.18.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: k...@davidedmundson.co.uk
Reporter: dac...@public-files.de
CC: plasma-b...@kde.org
Target Milestone: 1.0
SUMMARY
Plasma Shell pushes 1 out of 4 CPUs up to 100%
This slows the system down & blocks interactions with Plasma
STEPS TO REPRODUCE
1. Use the computer
2. open typical programs like Thunderbird, Firefox
3. switch different applications
OBSERVED RESULT
1. it slows down and down
2. especially switching between different windows takes a lot of time
3. any interaction with the Plasma Shell components (Application Menu, Editing
Panels, Switching Windows) has a lag and takes time
4. The following command solves the problem:
killall plasmashell ; plasmashell
Source:
https://www.reddit.com/r/kde/comments/6leps0/plasmashell_consumes_all_cpu/djt7xdv/
Problem: This also kills non-qt programs like Thunderbird and Firefox.
EXPECTED RESULT
1. Seamless operation
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.4
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.4.0-28-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-5300U CPU @ 2.30GHz
Memory: 15,5 GiB of RAM
ADDITIONAL INFORMATION
ps -Ao comm,pcpu,cpuid,%mem --sort=-pcpu | head -n 10
COMMAND %CPU CPUID %MEM
plasmashell 61.2 2 2.4
ksysguard 21.4 1 0.8
firefox 15.9 0 7.5
ksysguardd 15.5 0 0.1
thunderbird 8.7 0 4.0
Web Content 3.5 0 3.9
htop 3.1 0 0.0
Xorg 2.8 0 2.8
chrome 2.6 1 3.7
==> no idea how to show that CPU 4 is at 100%
Ksysguard does not show how each process is distributed along different
processes.
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