[Bug 1714431] [NEW] Can not login after switch to runlevel 3 from 1

[Ike Panhc]

Public bug reported:

No login prompt or anything on console after switch to runlevel 3/5 from
1

Step to reproduce
1) Make sure root password is set
2) login as root on console
3) `init 1` switch to runlevel 1
4) login again as root
5) `init 3` or `init 5` and no login or prompt

root at D05-2:~# init 1
root at D05-2:~# 
Ubuntu 16.04.3 LTS D05-2 ttyAMA0

D05-2 login: root 
System is going down.

Password: 
Last login: Fri Sep  1 07:28:04 UTC 2017 on ttyAMA0
Welcome to Ubuntu 16.04.3 LTS (GNU/Linux 4.10.0-33-generic aarch64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  Get cloud support with Ubuntu Advantage Cloud Guest:
    http://www.ubuntu.com/business/services/cloud

0 packages can be updated.
0 updates are security updates.


root at D05-2:~# init 5
[  103.499358] cloud-init[4497]: Cloud-init v. 0.7.9 running 'init-local' at Fri, 01 Sep 2017 07:28:40 +0000. Up 103.12 seconds.

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1714431

Title:
  Can not login after switch to runlevel 3 from 1

Status in systemd package in Ubuntu:
  New

Bug description:
  No login prompt or anything on console after switch to runlevel 3/5
  from 1

  Step to reproduce
  1) Make sure root password is set
  2) login as root on console
  3) `init 1` switch to runlevel 1
  4) login again as root
  5) `init 3` or `init 5` and no login or prompt

  root at D05-2:~# init 1
  root at D05-2:~# 
  Ubuntu 16.04.3 LTS D05-2 ttyAMA0

  D05-2 login: root 
  System is going down.

  Password: 
  Last login: Fri Sep  1 07:28:04 UTC 2017 on ttyAMA0
  Welcome to Ubuntu 16.04.3 LTS (GNU/Linux 4.10.0-33-generic aarch64)

   * Documentation:  https://help.ubuntu.com
   * Management:     https://landscape.canonical.com
   * Support:        https://ubuntu.com/advantage

    Get cloud support with Ubuntu Advantage Cloud Guest:
      http://www.ubuntu.com/business/services/cloud

  0 packages can be updated.
  0 updates are security updates.

  
  root at D05-2:~# init 5
  [  103.499358] cloud-init[4497]: Cloud-init v. 0.7.9 running 'init-local' at Fri, 01 Sep 2017 07:28:40 +0000. Up 103.12 seconds.

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