https://bugs.kde.org/show_bug.cgi?id=463808
Bug ID: 463808
Summary: Quickly pressing alt+tab in succession from a window
that is capturing the cursor won't keep mouse focus
Classification: Plasma
Product: kwin
Version: 5.26.5
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: matheus.scattolinanse...@outlook.com
Target Milestone: ---
SUMMARY
This does not happen in the X11 session, only wayland is affected here.
If the current focused window is capturing the pointer, pressing alt+tab twice
(apparently under 1s), effectively switching to another window and quickly
going back, the mouse focus is completely lost, as in you can't interact with
the window using the mouse pointer anymore.
This is particularly obvious in full screen games, as you can't use the mouse
within the game window after alt+tabbing twice, yet the cursor is visible on
the screen, it's simply not relayed to the window anymore.
The workaround is to manually minimize the window or pressing alt+tab again,
then waiting a second, then alt tabbing back. It kinda feels like there's a
timer component to it
Keyboard focus in this scenario works as expected regardless
STEPS TO REPRODUCE
1. Open fullscreen game: native/wine, it doesn't matter
2. Press alt+tab twice quickly
3. Cursor is visible on top of the window, but you can't interact with it
anymore
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