By chance (while developing some netplan code), I seem to have found a reproducer for this bug... I don't know what is going on, but calling the 'Trigger' method from the attached 'dbus.c' file will kill the GDM session in a reproducible way.
The invalid `kill(-1, SIGINT);` of line 21, seems to somehow crash the whole DBus/GDM and other services. So there must be some problem inside DBus's error handling, which is somehow triggered during the updates. * WARNING: calling the Trigger method via busctl will kill your GDM session * * compile: gcc -o out dbus.c `pkg-config --cflags --libs libsystemd glib-2.0` * execute: sudo ./out * trigger: sudo busctl call io.netplan.Netplan /io/netplan/Netplan io.netplan.Netplan Trigger ** Attachment added: "dbus.c" https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1871538/+attachment/5414222/+files/dbus.c -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871538 Title: dbus timeout-ed during an upgrade, taking services down including gdm To manage notifications about this bug go to: https://bugs.launchpad.net/systemd/+bug/1871538/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
