Grub Says: "Attempting to Decrypt Master Key" on Every Boot

The system is recently upgraded to 21.10 Every boot starts with this simple text message. I need to enter the LUKS passphrase. Once done .. it boots as before, and with the nice GUI, asks again for the LUKS passphrase.

This issue appaered after using a grub tool to update grub with new kernel, because after the 20.10 upgrade, I still had grub with a kernel from 19.xx or so kernel.

Please help me restore "normal" boot - straight to graphic LUKS passphrase question.

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Robert Thorne

Robert Thorne

Automotive & Future Transportation Editor

Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.

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