[Bug 1450588] Re: [FFe] /var/log/dmesg No Longer Being Updated

[Steve Langasek]

>From a feature freeze POV, this is ok with me.  I don't know that I
agree it makes sense to reintroduce this log file now after so long if
the information is available elsewhere, but I don't think I need to
block this w/ release team hat.

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https://bugs.launchpad.net/bugs/1450588

Title:
  [FFe] /var/log/dmesg No Longer Being Updated

Status in rsyslog package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Invalid

Bug description:
  [FFe]
   * (re-)introduce a feature to ensure the initial (boot time) kernel 
     messages are preserved
   * This existed up to Trusty (upstart) but was lost afterwards as it had 
     no systemd coutnerpart.
   * It is a "new" feature since we have lacked it for so many releases and 
     worth - a hopefully simple - ack by the release Team

   * It is not a new version or any change to the actual rsyslog code.
     Instead it just adds a new service "dmesg" that will achieve what was 
     lost post trusty. Therefore the potential regression to the existing 
     function should be minimal, if anything the new service might hit 
     issues on some unexpected environments but atm that seems unlikely.

   * It does not add/remove Dependencies nor modify build

   * I ahve made upgrade/install tests as well as Ahasenack doing the same 
     on the MP that is linked.

  
  ---

  After upgrading to Ubuntu 15.04 Vivid, /var/log/dmesg is no longer
  updated after boot.

  It appears that this was previously done via /etc/init/dmesg.conf

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