Comment 5 for bug 35824

I think I know now what is the problem. New "/etc/X11/xkb/symbols/inet" file contains the following section:

xkb_symbols "logitech_base" {
    key <I01> { [ XF86AudioMedia ] };
    [...]
    key <I2F> { [ XF86AudioRaiseVolume ] };
    key <I30> { [ XF86AudioRaiseVolume ] };
    [...]
    key <I6D> { [ XF86AudioMedia ] };
}

I'm using "logicdp" (Logitech Cordless Desktop Pro) keyboard model and these two buttons, XF86AudioMedia and XF86AudioRaiseVolume, cause previously mentioned problems with KDE. As we can see, there are two definitions for these keys. If I comment out the ones that do not apply to my keyboard, these keys work correctly with KDE.

The older "inet" file worked fine because there was a unique section for every Logitech keyboard model. This new "inet" has generic logitech_base section that is included to every logiXXXX keyboard model.

Well, this is all I can do. Hope this is solved soon somehow - whether it's xkeyboard-config's or KDE's problem.