grub2 error: symbol `grub_file_filters' not found

This document (000019919) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 15 SP2 Running on Microsoft Azure


After upgrading a gen2 VM running on Microsoft Azure to SLES 15 SP2, the system fails to boot and prints the following error to the Azure VM console: 
   Loading Linux 5.3.18-24.49-default ...
   error: symbol `grub_file_filters' not found.
   Loading initial ramdisk ...
   error: symbol `grub_file_filters' not found.

   Press any key to continue...


If the system was rebooted, the issue can be fixed with these steps: 
1- Create a recovery disk and set up a SLES15 SP2 gen2 chroot environment as described here:
2- Install the secure-boot shim to the recovery disk:
3- Swap out the VM's OsDisk in the Azure Portal WebUI or azure cli with the recovery disk created in step 1:
az vm update -g <resource group> -n <vm name> --os-disk <recovery disk>

If the system was not rebooted after the upgrade, kindly run: 



The issue is escalated to SUSE Engineering and Microsoft.


Reported to Engineering

Additional Information

SUSE and Secure Boot: The Details

Change the OS disk used by an Azure VM using the CLI:


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000019919
  • Creation Date: 19-Mar-2021
  • Modified Date:22-Mar-2021
    • SUSE Linux Enterprise Server

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