[Bug 1631474] Re: No networking with initramfs-tools 0.122ubuntu8.3 and ip=dhcp boot option

[scotte]

I tested with the PPA and it looks good in an initial test. Before,
upgrading initramfs-tools and rebooting would result in AWS instance
being unreachable. Now, it looks good!

$ cat /proc/cmdline
root=LABEL=cloudimg-rootfs ro console=hvc0 ip=dhcp tsc=reliable 

$ dpkg -l|grep initramfs-tools
ii  initramfs-tools                  0.122ubuntu8.3+lp1631474        all          generic modular initramfs generator (automation)
ii  initramfs-tools-bin              0.122ubuntu8.3+lp1631474        amd64        binaries used by initramfs-tools
ii  initramfs-tools-core             0.122ubuntu8.3+lp1631474        all          generic modular initramfs generator (core tools)

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Title:
  No networking with initramfs-tools 0.122ubuntu8.3 and ip=dhcp boot
  option

Status in initramfs-tools package in Ubuntu:
  In Progress
Status in initramfs-tools source package in Xenial:
  New

Bug description:
  initramfs-tools 0.122ubuntu8.3 introduced a serious regression where
  networking is not initialized when the boot option "ip=dhcp" is
  provided. We are seeing this problem in AWS, but cannot confirm if
  this issue is specific to AWS or will occur with different hardware or
  in different environments.

  Removing "ip=dhcp" from the boot options with 0.122ubuntu8.3 results
  in networking being configured.

  The issue does not occur with 0.122ubuntu8.2 or previous versions when
  "ip=dhcp" is set.

  AWS has no console so debugging is not a trivial task. I do have a
  console log with some output, and will update this bug shortly with
  it.

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