I have the very same issue. I'm using all packages from GNUI/Debian/sid.
GNOME-Shell: 3.20.2-1 nvidia: 352.79-7 Thanks! -- Pascal Obry / Magny Les Hameaux (78) The best way to travel is by means of imagination http://photos.obry.net http://www.obry.net gpg --keyserver keys.gnupg.net --recv-key F949BD3B
