Help bios option launch efi shell from filesystem device not wroking

[Trektohi]

so I'm trying to run the EFI Shell, but all I get is a black screen then back to bios. I made a usb with GPT and fat32 file system then I downloaded the edk2 shell.efi and renamed it to shellx64.efi on the root of my usb.

I'm using a rampage iv gene bios 3404

[Nodens]

Not sure if loading EFI shell from a USB drive is supported. I run the EFI shll from the system drive's ESP.

You need to mount the ESP and place shellx64.efi at the root of the partition. Then you'll be able to boot it.

To mount the ESP do this:
diskpart
sel disk 0
list par
find the ESP partition number (in default win partitioning scheme it should be partition 2)
sel par 2
assign letter N

At that point it should be mounted as N. By default Win8 won't let you open the partition for viewing under Windows Explorer. So copy shellx64.efi to the root of N via the admin command prompt. 🙂

[Trektohi]

Thank you for your reply i was not able to get the EFI Shell to start with your method, but i was able to get it to work form the rear USB ports below the universal PS/2 port

[Nodens]

Ah were you trying the USB3 ports? Perhaps that's why. Funny it wouldn't run for you with my method because it's working great on this end:)

[Rick2001]

Can you please tell exactly what you did with the USB stick, in which port you put it and which files you put on exactly ?

I also can't get it to work, neither with the method that Nodens gave unfortunately. I need to flash the firmware on my LSI controller with the EFI shell. Have tried so many things but it just doesn't want to work.

Your help would be very appreciated... thanks!

[Nodens]

Can you verify that you have the shellx64.efi file at the ROOT of the ESP partition and you can't boot it?

[Rick2001]

I put the shellx64.efi file on the 2nd partition yes and with the option in the BIOS launch efi shell from filesystem device is still not working.
The file is at the root of the ESP partition as shown in the picture.

What else can I try ?

[Nodens]

Try renaming it to exactly "Shellx64.efi". I think it's case specific. Also which version of the shell are you using?

[Rick2001]

Well, found the solution finally...

I had secure boot at Windows UEFI mode instead of Other OS.... now it works fine.

Thanks anyway for your help!

[Nodens]

Ah..that explains it!