FYI: VTE (Debian package name: libvte-2.91-0) no longer ships gnome-pty-helper as of version 0.42.
VTE, and in turn gnome-terminal, no longer does utmp/wtmp logging at all. See https://git.gnome.org/browse/vte/commit/?id=299c700 and https://bugzilla.gnome.org/show_bug.cgi?id=747046 for further details. cheers, egmont