https://bugs.kde.org/show_bug.cgi?id=470155
Bug ID: 470155
Summary: Task manager keeps screencast running even if the
tooltip is hidden
Classification: Plasma
Product: plasmashell
Version: 5.27.5
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Task Manager and Icons-Only Task Manager
Assignee: plasma-b...@kde.org
Reporter: k...@hexchain.org
Target Milestone: 1.0
SUMMARY
After bringing a window forward by clicking on a task manager item and leaving
the mouse pointer there, plasmashell does not show a window thumbnail tooltip,
but the underlying screencast session keeps running.
STEPS TO REPRODUCE
1. Open some windows. Ideally, also open qpwgraph to visualize PipeWire
connections
2. Move the mouse pointer to the task manager, click on an item to open another
window, and leave the pointer there
OBSERVED RESULT
The thumbnail window may briefly appear, but in qpwgraph, the screencast
connection exists until the mouse pointer moves away.
EXPECTED RESULT
The screencast connection may need to be closed as soon as the window thumbnail
disappears.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 6.3.3-arch1-1 (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
In my system, this running screencast connection triggers a lot of logs in the
journal like these:
kwin_wayland[1312]: kwin_screencast: Dropping a screencast frame because the
compositor is slow
Makes me think that it affects system performance to some extent, but neither
kwin_wayland nor pipewire uses any noticeable CPU or GPU time (but why does it
think the compositor is too slow?).
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