- Running telinit u on a current vivid system under upstart, but with systemd-sysv installed (i. e. select upstart from grub, using init=/sbin/upstart) is returning immediately. strace shows that it's connecting to the upstart socket. dmesg shows that upstart-{udev,file}-bridge restarts and otherwise not much is going on.
- Running systemctl daemon-reexec on that system fails immediately with "Failed to get D-Bus connection: Operation not permitted" as the systemd D-Bus socket isn't available.
Debugging notes:
- Running telinit u on a current vivid system under upstart, but with systemd-sysv installed (i. e. select upstart from grub, using init=/sbin/upstart) is returning immediately. strace shows that it's connecting to the upstart socket. dmesg shows that upstart- {udev,file} -bridge restarts and otherwise not much is going on.
- Running systemctl daemon-reexec on that system fails immediately with "Failed to get D-Bus connection: Operation not permitted" as the systemd D-Bus socket isn't available.