https://bugs.kde.org/show_bug.cgi?id=463237
Bug ID: 463237
Summary: Unresponsive windows become responsive when losing
focus
Classification: Plasma
Product: kwin
Version: master
Platform: unspecified
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: olib...@outlook.com
Target Milestone: ---
SUMMARY
When a window is unresponsive, the frozenapp effect is applied and the title
has '(Not Responding)' appended. It takes time to determine that a window is
unresponsive when a window is focused. When it is marked unresponsive, when it
loses focus, it is marked responsive again, unless it loses focus before the
unresponsive state is recognised.
I could not determine why this issue occurs. I am not sure if this is a
regression, but I suspect that this is not the intended behaviour. Please move
the issue from general if this is not the appropriate component.
STEPS TO REPRODUCE
1. Open kwrite
2. `kill -SIGSTOP $(pidof kwrite)`
3. Focus kwrite, becomes unresponsive
4. Unfocus kwrite, window incorrectly loses unresponsive state
5. Focus again, window is now unresponsive
--
6. When refocusing a window, if the window is unfocused again *before* being
recognised as unresponsive, it will be correctly recognised as unresponsive in
the background, and if focused and unfocused, loses that state as above.
EXPECTED RESULT
The window should not lose its unresponsive state when it is unresponsive and
loses focus.
ADDITIONAL INFORMATION
A window becoming responsive is not an issue, regardless of focus (SIGCONT).
Add qDebug() << "unresponsive state: " << (unresponsive ? "true" : "false");
just beneath
https://invent.kde.org/plasma/kwin/-/blob/master/src/window.cpp#L3432 to help
identify how the unresponsive state changes. Also/alternatively pay attention
to the window title, as this change is immediate whereas the frozenapp effect
is animated.
This issue is for Wayland. It likely exists on X11 - I have not tested it.
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