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

[Jacob Lindquist]

Same problem. Have been trying to fix this all day. Upgraded 19.04 tó 19.10 it failed and enters grub rescue with grub_file_filters not found. Boot-Repair did not help. 
/dev/sda1 is my boot (Ext4 512 MB)
/dev/sda2 Partition 2 extended partition 240 GB
/dev/sda5 Partition 5 240 GB LUKS (encrypted)
And a /dev/mapper/luks-xxxxxxx.../ a LVM2 PV 

I am lost and have no idea what to do. :(

Jacob

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https://bugs.launchpad.net/bugs/1848797

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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