I have updated the EEPROM on all of my Pi4s that I use for testing etc.
I have gone into raspbian and changed the boot order from SD to USB and I have flashed (using etcher and raspberry pi USB tool) several different operating systems on USB thumb drives (32Gb, Kingston USB 3.0) but to no avail.
I have done the same with USB hard drives and hard drives in a USB 3 dock, both work. But for some reason I can’t get the thing to boot from a regular thumb drive.
I have come across simular behaviour when trying to boot windows from a USB stick, something to do with a bit flip that tells they system it’s a USB or boot drive? But I am stumped as to how to fix it on the Pi4.
Any clues or help out there?