the mixed env could be https://bugzilla.gnome.org/show_bug.cgi?id=777669
here on a new install ubuntu gives a wayland session ** Bug watch added: GNOME Bug Tracker #777669 https://bugzilla.gnome.org/show_bug.cgi?id=777669 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1705157 Title: "Ubuntu" and "Ubuntu on Xorg" randomly start the same session (maybe Wayland maybe Xorg) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-session/+bug/1705157/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs