https://bugs.kde.org/show_bug.cgi?id=464405
Bug ID: 464405
Summary: Individual widgets can cause plasmashell to hang or
crash
Classification: Plasma
Product: plasmashell
Version: 5.26.5
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: generic-performance
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
SUMMARY
I have seen that if a particular panel widget hangs, the whole panel becomes
unresponsive to input (both mouse & keyboard). This can be seen better when
your system have low memory & some of the widgets get swapped to disk.
STEPS TO REPRODUCE
1. Do something which can cause your PC's memory to get exhausted. Then open
any intensive widget (such as the application menu, audio menu or digital
clock.
2. If your system have swapped those widgets, those will take a few seconds to
open. With that time, try moving the mouse over some other widget. They won't
respond to mouse hover/click. Even keyboard shortcuts won't work (such as the
Super key to open the application menu).
3. This issue can also be reproduced by introducing lag/runtime errors to any
widget on purpose.
OBSERVED RESULT
Anything which is under plasmashell just stops responding to any input. The
right-click menu on the desktop, application menu or any other widget doesn't
work for a few seconds.
EXPECTED RESULT
Plasmashell should be responsive even if a widget stops responding.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.15.88-1-LTS (64-bit)
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
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