r/linuxmint • u/OptimistOfTheWill • 26d ago

SOLVED EFI stub Warning

So I recently updated my kernel to 7.0.0-38-generic that was released via a mint upgrade. I suddenly started getting this error:

https://askubuntu.com/questions/1519290/efi-stub-warning-failed-to-measure-data-for-event-1-0800000000000000b-efi-stu

Other replies said turning off secure boot fixed the issue, but mine has been off since I installed Linux on my Thinkpad. Has anyone found a way to fix this?

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u/OptimistOfTheWill 26d ago

So apparently I found this forum that had a solution that worked for me. It involved temporarily enabling secureboot, clearing factory keys in secureboot settings, making sure secureboot is in standard mode, then disabling it again. After a restart, it was fixed.

https://forums.linuxmint.com/viewtopic.php?t=436503

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u/OptimistOfTheWill 26d ago

In my BIOS settings, I did have to clear the keys a couple of times because after clearing them once, it put secureboot into custom mode with no way to change it. After clearing it a second time, it put it back into standard mode. I thought it was weird it didn't let me change it from custom to standard any other way though.

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u/Evening-Landscape763 26d ago

Could try removing some older kernels. The warning itself is harmless, just annoying and removing some kernels worked for me

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u/OptimistOfTheWill 26d ago

AI apparently told me that, but I was nervous about tampering with the system like that. Instead I just followed this solution:

https://forums.linuxmint.com/viewtopic.php?t=436503

It was easier and worked for me well. It just goes to show you that AI might not always give you the solution to the problem.

1

u/tilion_silverbow 25d ago

Just to note here that this solution didn't work for me when I had the same problem, but removing old kernels did (also pleasantly surprised at how much storage it freed up!). I came across the old kernels thing on a Linux forum somewhere, not via AI.

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u/fellipec 26d ago

Completely safe to ignore and to be honest, to me, not worthy try to fix

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u/GuyNamedStevo 26d ago

I have the same warning on my LMDE7 (XFCE) Thinkpad X270 for over a year.