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.
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.
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.