https://bugs.kde.org/show_bug.cgi?id=407196
Bug ID: 407196
Summary: plasmashell wakes up a lot (eating CPU and battery) on
stock configuration
Product: plasmashell
Version: master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Application Launcher (Kickoff)
Assignee: k...@davidedmundson.co.uk
Reporter: d...@dosowisko.net
CC: plasma-b...@kde.org
Target Milestone: 1.0
SUMMARY
Seems like Application Launcher widget is somewhat responsible for elevated CPU
(and battery) usage on plasmashell.
STEPS TO REPRODUCE
1. Run a vanilla clean Plasma session.
2. Wait a but until everything finishes launching and becomes idle.
3. Attach strace to a running plasmashell process ("sudo strace -f -p `pidof
plasmashell`")
OBSERVED RESULT
Lots of repeated polls with timeout values less than 20ms, easily eating
significant amounts of CPU (around 5% here).
EXPECTED RESULT
Some occasional polls, plasmashell achieving <1% CPU usage when idle.
--------------------------------------
Afterwards (additional info gathered when investigating):
STEPS TO REPRODUCE
1. Remove Application Launcher widget from the default panel.
2. Add it back.
OBSERVED RESULT
plasmashell becomes way more CPU friendly.
--------------------------------------
STEPS TO REPRODUCE
1. Restart plasmashell.
OBSERVED RESULT
plasmashell becomes CPU hungry again.
EXPECTED RESULT
plasmashell should still be CPU friendly.
--------------------------------------
STEPS TO REPRODUCE
1. Remove Application Launcher.
2. (optionally) Add Application Menu.
3. Restart plasmashell.
OBSERVED RESULT
Plasma is still CPU friendly
SOFTWARE/OS VERSIONS
Tested with latest (2019-05-03) Neon Developer Edition ISO.
ADDITIONAL INFORMATION
All the steps above suggest that something is wrong with Application Launcher
widget, but only when it's loaded together with Plasma and/or panel (adding it
with a default panel causes the same result as restarting whole Plasma).
--
You are receiving this mail because:
You are watching all bug changes.
