[Bug 1235231] Re: plymouth loses output to /dev/console (such as ci-info: messages)

[Scott Moser]

Theres a plea for review/accept at http://irclogs.ubuntu.com/2013/11/25/%23ubuntu-devel.html#t14:18 that is met with 2 questions:
 a.) why isn't this in plymouth package (because slangasek requested it not be)
 b.) why isn't this in cloud-init package (because its not at all related to cloud-init)

Rbasak mentioned that disabling plymouth does have fallout, for example
lightdm is 'start on started plymouth'. Other upstart jobs on my system
that mention plymouth are:

$ grep -r plymouth /etc/init  -l | grep -v "/plymouth"
/etc/init/console-font.conf
/etc/init/lightdm.conf
/etc/init/failsafe.conf
/etc/init/setvtrgb.conf
/etc/init/mountall.conf
/etc/init/friendly-recovery.conf

lightdm and failsafe are the ones that seem most worrysome there.

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Title:
  plymouth loses output to /dev/console (such as ci-info: messages)

Status in The Plymouth splash screen:
  Confirmed
Status in “cloud-init” package in Ubuntu:
  Confirmed
Status in “plymouth” package in Ubuntu:
  Confirmed

Bug description:
  During early boot, plymouth captures writes to /dev/console.  As I
  understand it, it is supposed to re-play that content later.  Whether
  or not it intends to is not the issue.  In our cloud-images (and in
  other cases) users may write data to /dev/console that needs to be
  seen on the other side (ie a serial logger or 'get-console-ouptput'
  api call).

  See the attached 'my-logger.conf' for an upstart job that simply
  writes data early in boot to /dev/console.  Sometimes data "lost" is
  available in /var/log/boot.log, but sometimes it doesn't even seem to
  make it there.  bug 682831 has an attachment 'myhack-init' that does a
  similar thing but starts outputting by replacing /sbin/init and then
  calling /sbin/init itself.

  Related bugs:
   * bug 682831:  lost console output early in boot

  == Original bug report ==
  On precise cloud images, I get a console output line like this:

  ci-info: eth0  : 1 192.168.122.204 255.255.255.0   52:54:00:7f:d8:ca^M

  On saucy cloud images, this is missing.

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