Can you try moving the default kernel files:I am suspecting that something is no longer working in loading the initramfs file when os_prefix is being used.
bcm*.dtb files
initramfs_2712
kernel_2712.img
overlays/
to /boot/firmware/6.12.47-custom and setting os_prefix=6.12.47-custom and check if that works.
That may indicate if there's an issue with inittramfs and os_prefix, unrelated to your custom kernel (and will be easier for someone else to reproduce).
If that works, it may suggest something specific about your build/install is causing the issue.
Statistics: Posted by dom — Mon Dec 01, 2025 10:37 am