Hi, > I hoped that > sudo add-apt-repository ppa:gnome3-team/gnome3-staging > sudo add-apt-repository ppa:gnome3-team/gnome3 Maybe you just shouldn't use a ~ 7.5 years old release? Even the various "current" LTSes contain 3.22: https://packages.ubuntu.com/search?keywords=libgtk-3-0 Regards, Rene