Linux General

[prakhars962]

I am trying to boot into Arch Linux live with a secure boot enabled USB. I am getting this error: OS Loader signature found in Secure boot exclusion database (dbx). Bootable device failed Secure  boot verification.

Is Windows 11 or the Dell BIOS updates blacklisting the Linux to boot?

[ejn63 · Accepted solution]

It is an issue with the distribution you're trying to install having an entry in the exclusion (not allowed) database.  The  technical details are linked below.

https://support.microsoft.com/en-us/windows/windows-11-and-secure-boot-a8ff1202-c0d9-42f5-940f-843ab...

[prakhars962]

Actually I wanted to uninstall Windows 11 and install Arch Linux. looks like I have to disable the secure boot but I won't install in legacy mode. Thanks for the info btw.

[ejn63]

There is no Legacy mode  in this system -- you must use a Linux distribution that supports UEFI boot (a separate issue from there being secure boot support).