I want to use the function Walk through windows of current application with the standard assigned shortcut Alt+`. In the shortcuts, it is defined correctly.
However, when I invoke it in e.g. LibreOffice Writer (tried also other apps), it does not work.

I use Kubuntu 14.04 with Slovak as standard keyboard layout.

I wonder if it has something with the keyboard layout. But in the same conditions in Unity, it worked very well. Any idea?