use init6 or init9 as /etc/init
(init7 does not contain /tmp/utmp & /tmp/wtmp file writing code)

When ALT+127 keys pressed (at multi user or single user mode select prompt) 
init9 displays "serial port -terminal- login feature has been disabled.."
message but init6 (& init7) does not display this message.
(Except this -message display- difference, init6 and init9 are same.)