libgdm-dev - 43.0-3pureos1~cri1 main

GDM provides the equivalent of a "login:" prompt for X displays: it
asks for a login and starts graphical sessions.
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It supports multiple seats and switching between multiple users.
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The greeter is based on the GNOME libraries and applications, and its
look and design are the same as those of a GNOME session.
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This package contains header and development files.