Comment 28 for bug 1867092

I faced this, but not on a Mac. I have an ordinary Desktop PC with a Gigabyte 880GM-USB3 (rev3.1) motherboard. This old motherboard does not have secure boot or MokManager or UEFI etc. It has a legacy BIOS. I installed Ubuntu 20.10 (Groovy Gorilla) yesterday. Each time I start the PC, I'm shown the following message for around 10 seconds and only then it proceeds to grub:
Failed to set MokListRT: Invalid Parameter
Could not create MokListRT: Invalid Parameter
Importing MOK states has failed: import_mok_state() failed: Invalid Parameter
Continuing boot since secure mode is disabled System BootOrder not found. Initializing defaults.
Creating boot entry "Boot0002" with label "ubuntu" for file "\EFI\ubuntu\shimx64.efi"
Failed to set MokListRT: Invalid Parameter
Could not create MokListRT: Invalid Parameter
Import MOK states has failed: import_mok_state() failed: Invalid Parameter
Continuing boot since secure mode is disabled.

I've attached an image of the error screen. The annoying thing about this bug is that each time I start my PC, this message is shown for 10 seconds. Please fix this. Many people still use old computers that don't have MokManager etc. Please take that into account.