[Bug 1586894] Re: Xenial upgrade installs i386 kernel despite amd64 userland

[Ryan C. Underwood]

Or just check uname -m and don't install a different arch kernel during
the upgrade. :-)

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https://bugs.launchpad.net/bugs/1586894

Title:
  Xenial upgrade installs i386 kernel despite amd64 userland

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  I had a Trusty 14.04 LTS system and used update-manager -d to trigger
  the release upgrade to Xenial.  Everything went fine, but when I
  rebooted into the kernel 4.4.0-22-generic I was greeted with a
  stacktrace and an error about not being able to execute /sbin/init on
  the initrd.

  I booted into the old kernel and extracted and compared the initrd's
  and everything important was the same.  I then booted with
  boot_delay=250 and after a long wait was able to see "request_module:
  runaway loop modprobe binfmt-464c" messages indicating wrong binary
  format.  Then I looked at the kernel config and noticed that
  CONFIG_X86_64 was not defined on the upgrade kernel; afterwards, I saw
  that linux-image-generic:i386 and friends were installed.

  After replacing linux-image-generic:i386 and friends with the amd64
  variants, all was fine.

  Please ensure that if linux-image-generic is installed or replaced,
  its arch matches the arch of /sbin/init or systemd perhaps?

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.14
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sun May 29 21:22:01 2016
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2016-05-30 (0 days ago)
  VarLogDistupgradeAptclonesystemstate.tar.gz:
   Error: command ['pkexec', 'cat', '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
   Error executing command as another user: Not authorized
   
   This incident has been reported.
  VarLogDistupgradeApttermlog: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-term.log'
  VarLogDistupgradeTermlog:

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