Have the same issue for quite some time. Couldn't find any pattern yet. Also have the impression gdm is waiting for something. It happens for me when I am on Ethnernet as well when on wifi.
Have Dell XPS13 with Ubuntu 18.04.2, kernel 4.18.0-25-generic. Found today dozens in syslog: /usr/lib/gdm3/gdm-x-session[475]: (II) systemd-logind: got pause for 13:67 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1785964 Title: Unable to unlock the desktop session: systemd-logind: got pause for 13:69 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1785964/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
