This bug was fixed in the package gdm3 - 3.18.3-0ubuntu2.2
--------------- gdm3 (3.18.3-0ubuntu2.2) xenial; urgency=medium
* d/p/unblock-sigusr1.patch: - Unblock SIGUSR1 before PAM. (LP: #1782152)
-- Dariusz Gadomski <email address hidden> Mon, 23 Jul 2018 14:34:31 +0200
This bug was fixed in the package gdm3 - 3.18.3-0ubuntu2.2
---------------
gdm3 (3.18.3-0ubuntu2.2) xenial; urgency=medium
* d/p/unblock- sigusr1. patch:
- Unblock SIGUSR1 before PAM. (LP: #1782152)
-- Dariusz Gadomski <email address hidden> Mon, 23 Jul 2018 14:34:31 +0200