[Bug 1775743] Re: [regression] Cosmic daily images 20180606-11 install but boots only to grub prompt on EFI systems

[Łukasz Zemczak]

For now I'm just writing down some of my random thoughts, but looking at
Daniel's diff between the working image and non-working, I don't see
anything straightforward that could have caused it. That being said,
Dimitri had a good idea that one of the livecd-rootfs changes could have
caused it. I now see this which might be somehow related?

https://launchpad.net/ubuntu/+source/livecd-rootfs/2.528

Time-wise it could fit, as the package - even though uploaded on the
28th of May, it actually only migrated from cosmic-proposed to cosmic on
the 5th of June (our images are built without -proposed enabled). Need
to look into the change itself, but it does deal with grub somehow.

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https://bugs.launchpad.net/bugs/1775743

Title:
  [regression] Cosmic daily images 20180606-11 install but boots only to
  grub prompt on EFI systems

Status in grub2 package in Ubuntu:
  In Progress

Bug description:
  Cosmic daily images install successfully but then never boot (stuck in
  grub). I've tried a couple of machines.

  Fails: 20180611
  Fails: 20180608
  Fails: 20180607
  Fails: 20180606
  Works: 20180530

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