Although I originally shared Daniel's doubt, I reported it to Debian and shared the patch (bug linked above).
** Bug watch added: Debian Bug tracker #905277 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=905277 ** Also affects: gdm3 (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=905277 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1782152 Title: GDM blocks SIGUSR1 used in PAM scripts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1782152/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
