[Bug 1558565] [NEW] Unprivileged system LXC containers refuse to start after upgrade to Ubuntu 16.04

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System was previously running Ubuntu 14.04 LTS 64-bit and Linux
containers worked very well.  Linux containers are unprivileged
containers started by the system using dedicated UID and GID mapped
ranges, not userns containers.

Upon upgrade-in-place to 16.04 LTS using "do-release-upgrade -d", the
LXC containers will no longer start.  I see the following in the logs:

      lxc-start 20160317093843.710 ERROR    lxc_utils - utils.c:open_without_symlink:1625 - No such file or directory - Error examining efi in /usr/lib/x86_64-linux-gnu/lxc/sys/firmware/efi/efivars
      lxc-start 20160317093843.727 ERROR    lxc_conf - conf.c:run_buffer:347 - Script exited with status 127
      lxc-start 20160317093843.727 ERROR    lxc_conf - conf.c:lxc_setup:3753 - failed to run autodev hooks for container 'boinc'.
      lxc-start 20160317093843.727 ERROR    lxc_start - start.c:do_start:793 - failed to setup the container
      lxc-start 20160317093843.727 ERROR    lxc_sync - sync.c:__sync_wait:51 - invalid sequence number 1. expected 2
      lxc-start 20160317093843.727 ERROR    lxc_start - start.c:__lxc_start:1286 - failed to spawn 'boinc'
      lxc-start 20160317093849.276 ERROR    lxc_start_ui - lxc_start.c:main:344 - The container failed to start.
      lxc-start 20160317093849.276 ERROR    lxc_start_ui - lxc_start.c:main:346 - To get more details, run the container in foreground mode.
      lxc-start 20160317093849.276 ERROR    lxc_start_ui - lxc_start.c:main:348 - Additional information can be obtained by setting the --logfile and --logpriority options.

I did try converting to unprivileged containers to see if it would help
(which is the state the system is in now), but it did not help.

I'm more than happy to work with you to help debug this, so please let
me know how I can help.

Thanks,
Brian

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lxc2 (not installed)
ProcVersionSignature: Ubuntu 4.4.0-13.29-generic 4.4.5
Uname: Linux 4.4.0-13-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
Date: Thu Mar 17 09:46:14 2016
InstallationDate: Installed on 2015-05-04 (317 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lxd
UpgradeStatus: Upgraded to xenial on 2016-03-16 (0 days ago)

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


** Tags: amd64 apport-bug xenial
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Unprivileged system LXC containers refuse to start after upgrade to Ubuntu 16.04
https://bugs.launchpad.net/bugs/1558565
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