[Bug 1848797] Re: After upgrading to 19.10, boot screen shows: "Error: symbol 'grub_file_filters' not found."

[mlmartin]

Had same issue.

Kubuntu 19.04 VM running on Virtualbox Version 6.0.14 r133895, upgraded
via instructions on
https://help.ubuntu.com/community/CosmicUpgrades/Kubuntu as of
28/10/2019

SATA controller with dynamically allocated .vdi file set as storage, non
encrypted.

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Title:
  After upgrading to 19.10, boot screen shows: "Error: symbol
  'grub_file_filters' not found."

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  After upgrading to 19.10 the boot screen shows the following error:

  Error: symbol 'grub_file_filters' not found.
  Entering rescue mode...

  
  I could fix it after i booted Ubuntu 19.10 live and used the chroot repair method as described here  https://wiki.ubuntuusers.de/GRUB_2/Reparatur/#chroot-Methode (german)

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