Hi, I am able to reproduce this issue using the the latest daily Trixie image, 'debian-13-raspi-arm64-daily.tar.xz'. I am attempting to boot it on a Raspberry Pi Model 4B.
Steps to reproduce: * Download the iamge from https://raspi.debian.net/, clicking the 'Image download' link underneath 'Debian 13 "Trixie" (Stable)'. * Unpack the image with `tar -xf debian-13-raspi-arm64-daily.tar.xz`. * Flash the image to an SD card with `sudo dd if=./disk.raw of=/dev/sda bs=4M status=progress oflag=direct; sync;` (note that I'm using a USB SD card "reader") * Insert the SD card into the Raspberry Pi * Insert all peripherals (network, keyboard, display) * Insert the power cable The rainbow screen appears, and the SD card read light turns on and stays on for a bit. The rainbow screen then continues to be displayed indefinitely, and the SD card read LED begins blinking in a steady pattern, 7 short blinks at a time with some space in between each group of blinks. According to https://www.raspberrypi.com/documentation/computers/configuration.html#led-warning-flash-codes, 7 short flashes indicates that the kernel image could not be found. I plugged the SD card into my normal work PC, mounted the firmware partition (`/dev/sda15`) to `/mnt`, and then explored around. There is a `vmlinuz-6.12.73+deb13-arm64` file present, and config.txt contains a line that reads `kernel=vmlinuz-6.12.73+deb13-arm64`, so it seems like the image *should* work. Furthermore, the image is using a hybrid GPT/MBR partition table, and the first partition on the MBR partition table is the FAT32 boot partition, so I don't really understand *why* this isn't working yet, I just know it isn't. I'll probably report back with more research on this soon-ish.
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