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

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On 2013-11-25T15:00:16+00:00 Scott Moser wrote:

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 Ubuntu 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' EC2 api call).

This bug is easily reproducible on a local kvm, a cloud such as EC2 or a
local lxc container.  In my opinion, it should be considered "data
loss".  The issue is that a user cannot reliably write data to
/dev/console.

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 (http://pad.lv/682831) has an attachment 'myhack-init'
that does a similar thing but starts outputting by replacing /sbin/init
and then calling /sbin/init itself.

I'd really appreciate it if someone was able to take a look at this.
I'm willing to help reproduce it and can even give access to some cloud-
instances that can reproduce if necessary.

Reply at: https://bugs.launchpad.net/ubuntu/+source/cloud-
init/+bug/1235231/comments/24


** Changed in: plymouth
       Status: Unknown => Confirmed

** Changed in: plymouth
   Importance: Unknown => Medium

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

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