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Problem Description
============================
console access is lost if #init 3 ; is run from #init 1 ;
---uname output---
4.2.0-30-generic #35~14.04.1-Ubuntu SMP Fri Feb 19 15:23:48 UTC 2016 ppc64le
ppc64le ppc64le GNU/Linux
Machine Type = 8247-22L
Steps to Reproduce
====================================
login to console of ubuntu 14.04.4 system (either on bare-metal or PowerVM
based lpar ) , use ipmitool console for bare-metal, use mkvterm console from
hmc for PowerVM based lpar.
#runlevel ; to check the current default run level
#init 1;
#init 3; or ; #exit
Console access is lost [hung] cannot regain the console, only solution
is reboot of the server.
=========console logs=======
root@ltcbrazos2-lp18:~# init 1
root@ltcbrazos2-lp18:~# Skip stopping firewall: ufw (not enabled)
wait-for-state stop/waiting
* Stopping rsync daemon rsync [ OK ]
[ OK ]
* Killing all remaining processes... [fail]
* Will now switch to single-user mode
Give root password for maintenance
(or type Control-D to continue):
root@ltcbrazos2-lp18:~#
root@ltcbrazos2-lp18:~#
root@ltcbrazos2-lp18:~# runlevel
1 S
root@ltcbrazos2-lp18:~# init 3
root@ltcbrazos2-lp18:~# exit
* Restoring resolver state... [ OK ]
===========================
Console is hung indefinitely, no login prompt is offered
===========================
Please note the system successfully goes to #init 3 ;
network comes back, SSH works, but cannot access the system via any console.
Userspace rpm: upstart
== Comment: #2 - NAVEED A. UPPINANGADY SALIH <naveed...@in.ibm.com> -
2016-02-26 07:28:47 ==
(In reply to comment #1)
> Hi Naveed,
>
> Can you please check for 'who -r' once you switch to runlevel 3 ?
> What is the intention of the exit command here ? Is it for you to terminate
> your session ? Is the terminal available for you to execute other commands
> as well or does it hang at that stage as well?
>
> Thank you.
you can access the system via terminal using ssh even though console is not
accessible
==========
root@ltcbrazos2-lp18:~# who -r
run-level 3 2016-02-26 07:14 last=S
==========
I think "exit" or "init 3" either of the command does same from runlevel 1 ?
Correct me if I am wrong.
from ssh session if "init 6" or "init 1" is issued again, we are able to
access the console again.
** Affects: upstart (Ubuntu)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: Won't Fix
** Tags: architecture-ppc64le bot-comment bugnameltc-137818 severity-medium
targetmilestone-inin---
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[upstart] console access of the server is lost when trying to change runlevel 3
from runlevel 1
https://bugs.launchpad.net/bugs/1557990
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