Debian 13.6 2026-07-24 IoT (v6.18.x) on an old BB Black

General Discussion
1

Hello,

I have an old BeagleBone Black:

board_name=[A335BNLT] ...
board_rev=[00C0] ...

The following errors are reported when trying to boot a 2026-07-24 version from a microSD card:

uboot_overlays: unable to find [mmc 0:3 /lib/firmware/BB-ADC-00A0.dtbo]...
uboot_overlays: unable to find [mmc 0:3 /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo]...
uboot_overlays: unable to find [mmc 0:3 /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo]...
uboot_overlays: unable to find [mmc 0:3 AM335X-PRU-UIO-00A0.dtbo]...
uboot_overlays: unable to find [mmc 0:3 /lib/firmware/univ-bbb-EVA-00A0.dtbo]...

As a result, the eMMC isn’t found there is no /dev/mmcblk1* devices and it is impossible to run the init-beagle-flasher script the kernel panics.

Copying the missing files from /boot/dtbs to /lib/firmware fixes the issue.

Regards,

2

U-boot on the emmc is too old.. hold the usr button on power up to force u-boot from the microSD to load

3

Thank you, it works now the U-boot on the emmc has been updated.