With systemd.crash_shell=true systemd.confirm_spawn=true (which is very inconvenient to use), I've found out that the crash usually happens somewhere around the start of udev services.
** Also affects: udev (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1495116 Title: booting with amd64 kernel and completely i386 userland is unstable during the system upstart To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1495116/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs