[Bug 1815002] Re: quick-boot-lvm.patch caused regression - menu always appear if root is on Btrfs

[RussianNeuroMancer]

> RussianNeuroMancer's argument is different; he argues that using Esc
to access the GRUB menu during UEFI boot DOES work reliably and
therefore we should default to booting fast.

Just in case, I want to note, that it works with 2.02+dfsg1-5ubuntu8 but
not with 2.02+dfsg1-5ubuntu8.2. Could you please clarify where this
difference between 2.02+dfsg1-5ubuntu8 and 2.02+dfsg1-5ubuntu8.2 came
from? More information in Comment #14.

> The right solution is for us to make sure we always have writable
space where we can store grubenv between boots, so that we don't have to
choose between two suboptimal user experiences.

What is outcome of discussion mentioned by Mathieu in Comment #17?

> Instead of trying to fix the patch that introduced the problem. We
should fix the default partitioning when using LVM on Ubuntu, maybe this
bug should focus on that, so we don't see this problem on Ubuntu 19.04

Or store grubenv on esp partition as per Comment #17. I hope for this
one, as it's seems like less disturbing change for end users (no need
for repartition) and developers (no need for change default
partitioning).

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Title:
  quick-boot-lvm.patch caused regression - menu always appear if root is
  on Btrfs

Status in grub2 package in Ubuntu:
  Opinion

Bug description:
  Comments about this regression:

  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1800722/comments/12
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1800722/comments/13

  In my case menu starting to always appear on various devices from
  small tablets to workstations. First time it happened with laptop
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/736743/comments/95
  and since then more devices became affected. I not 100% sure, but
  seems like at least one unsuccessfully boot is required to reproduce
  this issue, but maybe I am mistake here and issue starting to happen
  for all Btrfs users.

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