I have installed LibreElec, but when I try to boot it, nothing happens. I think I have to edit the cmdline.txt file, but I am not sure what I need to put there to make it boot from the USB drive. I would appreciate any help. Thank you in advance.
I had an issue that my bootloader was an old version, I used the instructions here on "Update the bootloader"
Pi 4 Bootloader Configuration - Raspberry Pi Documentation
Now I can get libre to technically post, but not start.
I have tried downloading the latest 'start.elf' and 'fixup.dat' but it still will not start. (I tried it with both 'fixup4' and 'fixup4x' and the same for 'start.elf')
Update: LibreElec is displaying the splash screen, but all I see on the left is the following text endlessly repeating itself: