alt+tab switcher "cover switch" and "flip-switch" not working

English Applications
1

Hi, I have a problem with the “cover switch” and “flip switch” effetcs of the alt+tab task switcher.

If I go to “System Settings > Workspace > Window Management > Task Switcher” and select “Cover Switch” or “Flip Switch” from the drop-down list of effects, I instead get the default “Breeze” effect.

Also if I look at “System Settings > Workspace > Desktop Behavior > Desktop Effects” I cannot find those two effects, while I seem to remember seeing them previously.

Anybody else having this problem?

Here is information about my Tumbleweed release, if it is of any help:

cristiano@xmper8q3:~> lsb_release -a
LSB Version:    core-2.0-noarch:core-3.2-noarch:core-4.0-noarch:core-2.0-x86_64:core-3.2-x86_64:core-4.0-x86_64:desktop-4.0-amd64:desktop-4.0-noarch:graphics-2.0-amd64:graphics-2.0-noarch:graphics-3.2-amd64:graphics-3.2-noarch:graphics-4.0-amd64:graphics-4.0-noarch
Distributor ID: openSUSE Tumbleweed
Description:    openSUSE Tumbleweed
Release:        20161014
Codename:       n/a

cristiano@xmper8q3:~> plasmashell -v
plasmashell 5.8.2
2

Both of those switchers require OpenGL compositing, so have a look at “System Settings > Display and Monitor > Compositor”.
If the “Rendering backend” is set to XRender, switch it to OpenGL (2.0 or 3.1), and they should reappear in “Desktop Effects” (which only shows working effects)
kwin automatically switches to XRender if there is a problem with OpenGL (or it crashes).

3

That was exactly my case, thank you wolfi323!!

Cris