Comment 4 for bug 1430479

Stracing "telinit u" shows some interesting actions:

lstat("/run/systemd/system/", 0x7fff0ff73700) = -1 ENOENT (No such file or directory)

→ OK, that's the check whether systemd is running, it's expected to fail under upstart

execve("/lib/sysvinit/telinit", ["telinit", "u"], ... ) = 0

→ Hm, that's from upstart-bin, also looks ok

connect(3, {sa_family=AF_LOCAL, sun_path=@"/com/ubuntu/upstart"}, 22) = 0
[...]
sendmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\3\1\0\0\0\0\1\0\0\0P\0\0\0\1\1o\0\23\0\0\0/com/ubuntu/Upstart\0\0\0\0\0\2\1s\0\25\0\0\0com.ubuntu.Upstart0_6\0\0\0\3\1s\0\7\0\0\0Restart\0", 96}, {"", 0}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 96
exit_group(0) = ?
+++ exited with 0 +++

Hm, nothing unusual here.