{{tag>grub ubuntu troubleshooting}}

====== Grub errors out ======
Example of some error output:
<code>
dpkg: error processing package grub2-common
...
grub-pc depends on grub-common (= 2.04-1ubuntu26.13); however:
  Package grub-common is not configured yet.

...
No apport report written because MaxReports is reached already
                                                              No apport report written because MaxReports is reached already
</code>

Run this:
  sudo apt-get purge grub\*
  sudo apt-get install grub-efi
  sudo apt-get autoremove
  sudo update-grub
  
===== grub_file_filters not found =====
Go to rescue console/boot livecd depending on your environment.

If the server has raid 1 setup follow [[wiki:reinstall_grub_mdraid1_array|Reinstall grub on mdraid1 array]]

====== Tested on ======
  * Ubuntu 20.04.3

====== See also ======
  * [[wiki:error_invalid_environment_block_press_any_key_continue|Invalid environment block error]]
  * [[wiki:reinstall_grub_mdraid1_array|Reinstall grub on mdraid1 array]]
====== References ======
  * https://askubuntu.com/questions/1231781/errors-encountered-while-processing-grub-efi-amd64-signed-and-shim-signed-p