Bug 508088 - Cannot preview Cover Switch and Flip Switch task switchers on Wayland
Summary: Cannot preview Cover Switch and Flip Switch task switchers on Wayland
Status: CONFIRMED
Alias: None
Product: systemsettings
Classification: Applications
Component: kcm_kwintabbox (other bugs)
Version First Reported In: 6.4.4
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: wayland-only
Depends on:
Blocks:
 
Reported: 2025-08-10 16:00 UTC by Patrick Silva
Modified: 2025-08-11 20:47 UTC (History)
3 users (show)

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Description Patrick Silva 2025-08-10 16:00:26 UTC 
STEPS TO REPRODUCE
1. use Wayland
2. open Task Switcher KCM
3. select Cover Switch or Flip Switch task switcher
4. click on the button used to preview the selected task switcher

OBSERVED RESULT
nothing happens after the last step

EXPECTED RESULT
preview of the selected task switcher opens

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1
Graphics Platform: Wayland
Comment 1 Ismael Asensio 2025-08-10 16:26:23 UTC 
I can reproduce it on the Wayland session (the preview shows up on X11)

../kwin/tabbox/coverswitch/contents/ui/main.qml:28:5: QML QQuickWindowQmlImpl: Accessible attached property must be attached to an object deriving from Item or Action
qt.qpa.wayland: Failed to create grabbing popup. Ensure popup  QQuickWindowQmlImpl(0x724e8c001c00) has a transientParent set and that parent window has received input.
../kwin/tabbox/coverswitch/contents/ui/main.qml:46: TypeError: Cannot read property 'currentVirtualDesktop' of undefined
../kwin/tabbox/coverswitch/contents/ui/main.qml:45: TypeError: Cannot read property 'currentActivity' of undefined

Most of these errors also show up in the x11 session, except the qt.qpa.wayland related one