Raspberry Pi 4B (8GB) running bullseye, but does not seem to have any version of u-boot installed. Weird? Running <aptitude versions '?name(u-boot)'> tells me that the following (among lots of others) versions are available. Should I install one of them and see what happens? Package u-boot-rpi: p 2021.01+dfsg-5 stable 500 Package u-boot-rpi:armhf: p 2021.01+dfsg-5 stable 500 HTH Rick