[Bug 1889509] Re: grub boot error : "symbol 'grub_calloc' not found

[Robert C Jennings]

@marin-n & @hggdh2,

I see that you have both reported failures on Azure.  @marin-n, from
your grub versions it looks like you're on focal.  I'd like to learn
more so I can recreate and get this addressed.

I would like to find out:
- which image release and build you are running:
$ cat /etc/lsb-release
$ cat /etc/cloud/build.info

- the image source (publisher/offer) and the vmSize:
$ curl  --silent -H Metadata:true "http://169.254.169.254/metadata/instance/compute/?api-version=2017-08-01" | python3 -c 'import json,sys; data=json.load(sys.stdin);print("\n".join([data["vmSize"], data["publisher"], data["offer"]]));'

- anything special you've done with your config that would be relevant.

Thank you so much.

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https://bugs.launchpad.net/bugs/1889509

Title:
  grub boot error : "symbol 'grub_calloc' not found

Status in grub2 package in Ubuntu:
  Confirmed
Status in grub2 package in Debian:
  New

Bug description:
  After updating grub2 (to 2.02~beta2-36ubuntu3.26) and rebooting, my
  server does not boot:

  Booting from Hard Disk 0...
  error: symbol `grub_calloc' not found.
  Entering rescue mode...
  grub rescue> _

  I rebooted 3 servers in this way (all running Ubuntu 16.04.6 LTS) and
  all hung.

  A lot of other people are reporting the same problem at:

  https://askubuntu.com/questions/1263125/how-to-fix-a-grub-boot-error-symbol-grub-calloc-not-
  found.

  ---

  Above most likely means that dpkg debconf no longer knows about the
  correct drives to install grub onto.

  Please boot & mount all the target disks and execute

  $ sudo dpkg-reconfigure grub-pc

  You will be asked which drives to install grub onto, and then grub
  will be installed onto them, and more importantly, it will remember
  where to install grub to, on all future upgrades.

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