https://bugs.kde.org/show_bug.cgi?id=409259
Bug ID: 409259
Summary: Icons-only Task Manager hangs when switch desktops
with pinned apps
Product: plasmashell
Version: 5.16.2
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Icons-only Task Manager
Assignee: h...@kde.org
Reporter: till.seif...@spamfence.net
CC: plasma-b...@kde.org
Target Milestone: 1.0
I'm running KDE NEON with Plasma 5.16.2, but this bug has been present
unchanged in my setup since at least 5.15.
When i switch workspaces the plasmashell (desktop and all panels) freeze for
about 1s–60s and use 100% of one CPU-core in that time. After that they become
responsive again.
I see this only if a have (at the same time):
a) the icon-only task-manager enabled
b) some Apps-icons pinned -> the more apps I pin, the longer the lang becomes.
If i pin IntelliJ, if jumps especially, but every app increases it.
Grouping of icons or not doesd not affect it. Enabling "only icons from current
workspace" does not affect it.
STEPS TO REPRODUCE
1. active one Icon-only Taskmanager plasmoid
2. configure it to only show icons from current workspace (this is to better
see the lag)
3. open Firefox/Krwite/Konsole/Chrome each on one workspace and pin their icons
in the Taskmanager
4. switch to workspaces
5. observe the icons. they update some time after the workspace was switched
6. Pin more Apps (open or not) to increase the delay
EXPECTED RESULT
The panel and taskmanager should update instantly after switching workspaces,
which they do, if i pin no apps, even if many apps are open.
SOFTWARE/OS VERSIONS
Betriebssystem: KDE neon 5.16
KDE-Plasma-Version: 5.16.2
KDE-Frameworks-Version: 5.59.0
Qt-Version: 5.12.3
Kernel-Version: 5.0.5-050005-generic
Art des Betriebssystems: 64-bit
Prozessoren: 4 × AMD A8-6600K APU with Radeon(tm) HD Graphics
Speicher: 23,5 GiB Arbeitsspeicher
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