AMD Motherboards - Secure boot "auto disabling"

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Secure boot "auto disabling"

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=74270
Printed Date: 25 Oct 2024 at 7:35am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Secure boot "auto disabling"

Posted By: stevex
Subject: Secure boot "auto disabling"
Date Posted: 25 Oct 2024 at 2:50am

On all my computers I use linux and I setup them to boot using secure boot.

One of my computers has the B450M Pro4 motherboard.

The problem is that after setting up the secure boot and confirming that is enable at the first boot (with mokutil), on the boot after it (the second boot) the motherboard seems to restart few times before reaching Grub and when finally Linux starts the secure boot is disabled without me doing anything for this behaviour.

More, I noticed that if I for example enroll a new key on the first boot, the second boot I manage the key enrollment and then it boot normally in secure mode, but then on the next boot (the third) again is doing this strange behaviour:

$ mokutil --sb-state
SecureBoot disabled
Platform is in Setup Mode

How is it possible?

Note that this is the only one of my computers that is behaving in this way.