[Bug 1723806] Re: 1.108ubuntu15.4 hangs on upgrade

[Mathieu Trudel-Lapierre]

Whether ubiquity is installable is a different issue than console-setup
breaking on upgrade though. The ubiquity change is being reverted, but
we still need to figure out why the console-setup upgrade fails.

I've attempted to set up a virtual machine with Ubuntu Server, where I
can approximate the upgrade procedure for both server or desktop (by
changing whether and which plymouth splash shows). I haven't been able
to reproduce the issue yet.

It really looks to me like it's an issue with speaking to plymouth while
doing updates unattended, but am I wrong on that assumption?

And if it's indeed unattended upgrades, what does /boot/grub/grub.cfg
look like on the affected system?

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https://bugs.launchpad.net/bugs/1723806

Title:
  1.108ubuntu15.4 hangs on upgrade

Status in console-setup package in Ubuntu:
  New

Bug description:
  There is an SRU for 1.108ubuntu15.4 in xenial-proposed that hangs for
  me on upgrade, causing updates to get stuck across the system. Haven't
  tracked it down further than that but wanted to report a bug quickly
  to prevent further promotion of the package.

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