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When trying to update firmware for the "UEFI dbx" as shown here: enter image description here enter image description here I always get a "failed to update firmware!" message, as shown below: enter image description here It sais that "user needs to do an action to complete the update" but it is not clear what the action is supposed to be. Rebooting does nothing to change this.

Calixte
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1 Answers1

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You can try the install on the commandline for some more information.

sudo fwupdmgr update

And then when approving the update it will fail with a somewhat more specific message,

Blocked executable in the ESP, ensure grub and shim are up to date: /media/root/C7A1-263C/EFI/ubuntu/shimx64.efi Authenticode checksum [007f4c95125713b112093e21663e2d23e3c1ae9ce4b5de0d58a297332336a2d8] is present in dbx

Which lead me to the answer here: https://askubuntu.com/a/1436957/463508 but since in my case it referenced a file in some /media/root/C7A1-263C which I couldn't find, I looked a bit further and found https://askubuntu.com/a/1450728/463508 which helped me to a solution that worked for me:

sudo fwupdmgr update --force -y
Buurman
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