Hi Paul, I think the latest version of `initramfs-tools` is causing the problem. I was able to reproduce the same issue only by upgrading `initramfs-tools` without the dist-upgrade. With this knowledge I chrooted into my failing trixie installation, downgraded initramfs-tools to the version that bookworm was using and it booted up afterwards. Let me see if I can narrow down the problem. Thanks, Pranav