How do you enrol the SteamOS efi

[oscar42763]

I am unable to enrol the steamOS.efi, It doesn't show a EFI bootable when I use the command sudo sbctl sign -s esp/efi/steamos/steamcl.efi, I can't access it anymore.

[Pokepunch]

SteamOS by default won't work with Secure Boot even with steamcl.efi signed.

[downthecrop]

Correct, SteamOS GRUB uses the default shim-lock, you need to utilize a custom bootloader to get into SteamOS under SecureBoot. I have created an EFI you can use use yourself with your own keys or simply checkout my fork here: https://github.com/downthecrop/DeckSecureBoot

[ryanrudolfoba]

This is good info thank you for filling in the gaps and making the process easier. Gonna give this a try sometime. Get Outlook for Android<https://aka.ms/AAb9ysg>

…

________________________________ From: downthecrop ***@***.***> Sent: Tuesday, November 11, 2025 4:10:46 AM To: ryanrudolfoba/SecureBootForSteamDeck ***@***.***> Cc: Subscribed ***@***.***> Subject: Re: [ryanrudolfoba/SecureBootForSteamDeck] How do you enrol the SteamOS efi (Issue #6) [https://avatars.githubusercontent.com/u/4764745?s=20&v=4]downthecrop left a comment (ryanrudolfoba/SecureBootForSteamDeck#6)<#6 (comment)> Correct, SteamOS GRUB uses the default shim-lock, you need to utilize a custom bootloader to get into SteamOS under SecureBoot. I have created an EFI you can use use yourself with your own keys or simply checkout my fork here: https://github.com/downthecrop/DeckSecureBoot — Reply to this email directly, view it on GitHub<#6 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AXMTWIM55UJB55IP4Q2PMUL34GRZNAVCNFSM6AAAAACKKGMNDCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTKMJVG4YTQOBYHA>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>