Quando estiver em System Settings -> Window Management -> Task Switcher -> Main
, clique no botão Help
para abrir o artigo de ajuda correspondente. Nele há isto:
Cover Switch and Flip Switch effect are more fancy effects which require OpenGL. Cover Switch displays the windows in a gallery with a large thumbnail of the currently selected window in the center of the screen while all other windows are rotated on the left and right. Flip Switch displays all windows on a 3D stack. The selected window is on top of the stack and navigating through the windows will move the stack so that the new selected window is on the top.
If the effect provides additional settings the configure button will be activated. By clicking this button a configuration dialog will be shown.
Note
When compositing is not active or gets suspended the normal window list will be shown. There is no loss in functionality if an effect is selected and compositing is not active.
Isso significa que sua máquina deve ter OpenGL e que a composição deve estar ativa.
A execução de qdbus org.kde.KWin /KWin supportInformation | grep -E -A5 "^Compositing"
seria informativa.
Se a saída for como:
Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2)
OpenGL version string: 3.0 Mesa 18.0.0-rc5
OpenGL platform interface: GLX
OpenGL shading language version string: 1.30
tanto o Interruptor Flip como o Interruptor de Cobertura devem funcionar.