Xorg 1.16.4 and multimedia keys

[deloptes]

Never give up - after trying different options examining different files I
manage it to break all setup and no kbd or mouse working.
Than I did

apt-get --reinstall install xserver-xorg-input-kbd xserver-xorg-input-evdev
xserver-xorg-input-evdev-dbg

and all is working fine - the multimedia keys are there and work as before
It is interesting to know what did repair the setup