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

[Andreas Jung]

I too had this problem. Same error message in the grub prompt.

I had to burn a live-cd, and boot from it. Reapairing grub from live-
system didn't work, it "failed to get canonical path of /cow". So I
reinstalled the whole System while keeping all my settings, files, stuff
in /home, and so on

that worked quite well and getting things back to normal is done in no
time.

I know, this is no solution to the bug, but I think it's necessary to
give people a hint how to at least access their systems again.

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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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