gdm3 3.22.3-3+deb9u2 / usr / share / gdm / dconf / 90-debian-settings

/usr/share/gdm/dconf/90-debian-settings is in gdm3 3.22.3-3+deb9u2.

This file is owned by root:root, with mode 0o777.

It is a symlink to /etc/gdm3/greeter.dconf-defaults