Aug 13, 2019 · First, the MOK is created and prepared for installation while the OS is running, and a one-time password is created to protect the second phase of the installation process. Then, the system is rebooted, and the shimx64.efi will detect that a MOK installation process has been started, and shows the blue MOK Manager screen at boot. At that point ...

Nov 30, 2021 · The actual MOK will be located in /var/lib/shim-signed/mok/ directory once it has been created. It is a two-part cryptographic key: the public part, also called certificate, will be in the MOK.der file. This is the part that gets registered into the system firmware.

Mar 24, 2021 · If you don't do the "Enroll MOK" on the next reboot right after running update-secureboot-policy --enroll-key, the enrollment procedure will be on hold, waiting for you to either complete it by selecting "Enroll MOK" on a subsequent boot, or to cancel it with sudo mokutil --revoke-import within Linux.

Nov 29, 2023 · The MOK password prompt typically only runs once at initial machine set up. It is probably running more often because it has never succeeded. Typically the MOK password utility is only activated when secure boot is enabled AND you install a driver that must be compiled (like the nvidia dkms driver).

Feb 20, 2024 · That directory should contain two files: MOK.der is the public key that can be used to check the validity of the signatures, and a corresponding MOK.priv, the private key that can be used to create signatures. To restart the MOK enrollment procedure with an existing key (with which your NVidia modules are already signed), run:

Jun 20, 2023 · From time to time my NVIDIA drivers (signed with MOK) are not being loaded on my dual boot machine (Ubuntu 22.04 and Windows 11). I'm resolving the issue by reinstalling the same drivers with the same signing keys. Signing keys are on the same path all the time (I'm not deleting them or moving somewhere else).

Sep 7, 2020 · I am trying to enroll a MOK under Ubuntu 20.04.1 for supporting some third-party kernel modules while keeping Secure Boot enabled. The system boots fine with the stock kernel and modules, but I am having issues with using the Mok Manager to enroll the generated MOK that is being used to sign third-party kernel modules.

May 29, 2024 · The concept of MOK is not officially part of Microsoft's Secure Boot. It's implemented by Shim, a special loader that actually overrides the firmware's Secure Boot handling – it has its own signature verification code that allows MOK-signed loaders to completely bypass the built-in SB verification.

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Dec 10, 2022 · Some time ago I have installed Ubuntu 22.04 and installed proprietary nvidia drivers on it. That triggered creation of the new MOK (Machine Owner Key). In a meantime I have decided to reinstall the...