mgetty does not work in single user mode

I modify /etc/inittab so that mgetty should work in single user
mode. However it does not work in single user mode but work in
runlevel 6. Why?
s1:12345:respawn:/sbin/mgetty /dev/ttyS1 -s 115200 -r

/var/log/messages:
Oct 23 16:35:35 xenontc mgetty[1679]: data dev=ttyS1, pid=1679,
caller='none', cc
onn='DIRECT', name='', cmd='/bin/login', user='root'
Oct 23 16:46:19 xenontc init: Going single user

/var/log/mgetty.log.ttyS1:
10/23 16:29:31 yS1 mgetty: interim release 1.1.33-Apr10
10/23 16:29:31 yS1 check for lockfiles
10/23 16:29:31 yS1 locking the line
10/23 16:29:31 yS1 WARNING: DCD line still active, check modem
settings (AT&Dx)
10/23 16:29:31 yS1 lowering DTR to reset Modem
10/23 16:29:32 yS1 waiting...
10/23 16:35:35 ##### data dev=ttyS1, pid=1679, caller='none',
conn='DIRECT', namm
e='', cmd='/bin/login', user='root'

On 2007-10-23, (E-Mail Removed) <(E-Mail Removed)> wrote:
> I modify /etc/inittab so that mgetty should work in single user
> mode. However it does not work in single user mode but work in
> runlevel 6. Why?
> s1:12345:respawn:/sbin/mgetty /dev/ttyS1 -s 115200 -r
>
In single user mode, the file /etc/nologin is created. Users cannot
normally log in while that file exists. You could modify the /etc/pam.d
files to remove references to pam_nologin, or you could use a different
runlevel (in Debian-based distros, runlevels 2-5 are identical ny
default).

On Oct 23, 5:00 pm, wong_po...@yahoo.ca wrote:
> I modify /etc/inittab so that mgetty should work in single user
> mode. However it does not work in single user mode but work in
> runlevel 6. Why?
> s1:12345:respawn:/sbin/mgetty /dev/ttyS1 -s 115200 -r
>
> /var/log/messages:
> Oct 23 16:35:35 xenontc mgetty[1679]: data dev=ttyS1, pid=1679,
> caller='none', cc
> onn='DIRECT', name='', cmd='/bin/login', user='root'
> Oct 23 16:46:19 xenontc init: Going single user
>
> /var/log/mgetty.log.ttyS1:
> 10/23 16:29:31 yS1 mgetty: interim release 1.1.33-Apr10
> 10/23 16:29:31 yS1 check for lockfiles
> 10/23 16:29:31 yS1 locking the line
> 10/23 16:29:31 yS1 WARNING: DCD line still active, check modem
> settings (AT&Dx)
> 10/23 16:29:31 yS1 lowering DTR to reset Modem
> 10/23 16:29:32 yS1 waiting...
> 10/23 16:35:35 ##### data dev=ttyS1, pid=1679, caller='none',
> conn='DIRECT', namm
> e='', cmd='/bin/login', user='root'

It should be 'S' instead of '1' when starting single user mode:
s1:S2345:respawn:/sbin/mgetty /dev/ttyS1 -s 115200 -r