https://bugs.kde.org/show_bug.cgi?id=451803
Bug ID: 451803
Summary: Long press Tab + Alt triggers window switching when it
should not
Product: kwin
Version: 5.24.3
Platform: openSUSE RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: input
Assignee: kwin-bugs-n...@kde.org
Reporter: d0...@foxmail.com
Target Milestone: ---
SUMMARY
By default, Alt+Tab binds to window switching, and Tab+Alt binds to nothing.
However, only short press Tab+Alt does nothing as expected, but holding down
Tab longer, and pressing Alt erroneously bring up the window-switch UI.
This is especially annoying in full-screen games requiring the user to keep
holding tab, and use alt to interact with in-game mechanics.
Note: Using Kwin on Xorg.
STEPS TO REPRODUCE
1. Open a Konsole. I will use simple `xdotool` script to make this consistent,
but one can trigger the same with manual input.
2. These following inputs have inconsistent behavior:
1. Hold Alt for 0.1 sec, then Tab, window switched
- `xdotool keydown Alt; sleep 0.1; xdotool keydown Tab; sleep 0.1;
xdotool keyup Alt; xdotool keyup Tab`
2. Hold Tab for 0.1 sec, then Alt, window NOT switched
- `xdotool keydown Tab; sleep 0.1; xdotool keydown Alt; sleep 0.1;
xdotool keyup Alt; xdotool keyup Tab`
3. Hold Tab for 2.0 sec, then Alt, window switched (inconsistent behavior)
- `xdotool keydown Tab; sleep 2; xdotool keydown Alt; sleep 0.1;
xdotool keyup Alt; xdotool keyup Tab`
^ This might take a few tries to trigger. It triggers over 50% of the
time for me.
OBSERVED RESULT
Short Tab+Alt and holding Tab, then press Alt have inconsistent shortcut
behavior. Also, Tab+Alt should not trigger the same shortcut as Alt+Tab in the
first place.
EXPECTED RESULT
Ideally, Tab+Alt should not trigger the same shortcut as Alt+Tab. At least, the
duration of holding Tab should not affect the behavior of pressing Tab after.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Opensuse Tumbleweed
KDE Plasma Version: 5.24.3
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION
This might also happen to other 2-key short-cuts?
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