Security Boot Fail

[dawg1 (Joseph Andre)]

I am new to Linux and heard about Fedora Silverblue. So I installed it on an old laptop in order to try it but decided it is not really for me. I tried to install another Linux distro using an ISO on a USB stick, but every time I choose to boot the system from it, I get this “Security Boot Fail” message and this is as far as things go. I have noticed that since installing silverblue my uefi is not set to secure and there is no way of taking that secure mode off. Does silverblue turn on secure boot when it is installed? If so how can I get silverblue to remove the secure boot? Can anyone give me any advice as to what to do? Thank you

[theprogram (MatH)]

So you can get into your BIOS?

And secure boot is turned off?

And when you boot from a USB you get ’ secure boot fail’?

[dawg1 (Joseph Andre)]

This is the problem. The BIOS is the first place I went to. I tried to turn off the secure boot, but it will not allow me to do so. I even tried to reset the BIOS setting to factory, but it hasn’t changed a thing. Prior to installing silverblue I had no problems. Now I can’t do a thing. One thing that is off is that when I hit F12 for boot option, I have 3 boot option 2 Fedora and the ISO.

[theprogram (MatH)]

I don’t use Silverblue so I can’t comment on that version of Fedora.

What I can say is that Fedora or any Linux distro cannot alter your BIOS.

Can you post some photos of your boot options and BIOS options?
Its hard to understand why booting into a USB is not possible.

[dawg1 (Joseph Andre)]

[hricky (Hristo Marinov)]

Fedora Silverblue does not have the ability to change the BIOS settings on the computer. The following may be relevant:

Merely booting Fedora 42 Live media adds a "Fedora" entry to the UEFI boot menu

Problem As the Fedora Linux 42 release was halfway out the door, we became aware of an issue with many of the Live images in the release. This issue also affects two of the Fedora 41 live images. Affected images will add an unexpected entry to the UEFI boot manager list as soon as the medium is booted, even if you do not go on to install Fedora. The new entry is added to the top of the list (so it’s the first priority on boot). The entry is titled “Fedora”, and attempts to boot the Fedora live …

[dawg1 (Joseph Andre)]

i have followed the instructions on the link you sent me and although the 2nd fedora has disappeared, I still cannot boot from a USB ISO for another distro. Prior to installing Silverblue I had no problems booting other distro. Now, every time I try I get this “Security Boot Fail” message. Sorry but so far I am not impressed with Silverblue,

[theprogram (MatH)]

Thanks for those photos above.

Can you select the USB option as boot priority one, and take a photo of the error message?

[theprogram (MatH)]

I can’t understand how Silverblue affected your BIOS. It is technically impossible.

Can you format your hard drive in another computer?

[pg-tips (P G)]

@dawg1

I still cannot boot from a USB ISO for another distro. Prior to installing Silverblue I had no problems booting other distro.

What distros did you use on this machine before Silverblue?

Which distro are you trying to boot now?

What model is your laptop?

[alinausssieland (Al the Teutonian)]

Surely I must be missing something.
No 1 you can do.. Turn off computer, plug in USB drive with new OS. Turn on and go straight into bios, move USB up to the top line (in your picture from position 3 to position 1. Save and restart. That will get you onto your USB drive on boot-up.
But, there also should be a setting in the BIOS that allows you to boot from USB if a USB is detected. That is the one to turn on for future ability to boot from a live USB.

[dawg1 (Joseph Andre)]

It’s ok. I did further research online and found a way to override the secure boot. However, I still can’t understand why secure boot only came on after installing silverblue. Anyway, the secure boot has been removed and I have now loaded another distro. Thank you for the fix about the double fedora fix in the BIOS.