How to.disable HDMI on Beagle Board Black with "bone-debian-8.6-iot-armhf-2016-11-06-4gb.img"?

[goato...@gmail.com]

I have downloaded "bone-debian-8.6-iot-armhf-2016-11-06-4gb.img" from "https://beagleboard.org/latest-images", burned it into a microSD card, turned the card into a flasher, and flashed a Beagle Board Black with it.

I understood reading "/boot/uEnv.txt" that enabling the following line should disable the HDMI pins:

dtb=am335x-boneblack-overlay.dtb

However, when I reboot the Beagle Board, this is what I get:

<<

Loading, please wait...

mount: can't find /root in /etc/fstab

Target filesystem doesn't have requested /sbin/init.

mount: mounting /dev on /root/dev failed: No such file or directory

No init found. Try passing init= bootarg.

modprobe: module i8042 not found in modules.dep

modprobe: module ehci-pci not found in modules.dep

modprobe: module ehci-orion not found in modules.dep

modprobe: module uhci-hcd not found in modules.dep

modprobe: module ohci-hcd not found in modules.dep

BusyBox v1.22.1 (Debian 1:1.22.0-9+deb8u1) built-in shell (ash)

Enter 'help' for a list of built-in commands.

/bin/sh: can't access tty; job control turned off

(initramfs)

>>

What did I do wrong?

Turning the microSD back into non-flasher mode, booting the Beagle Board from it and making the same change in "uEnv.txt" works without any problem: the Beagle Board boots up and the the HDMI pins are now available for other uses.

[Robert Nelson]

On Thu, Nov 24, 2016 at 11:28 AM, <goato...@gmail.com> wrote:
> I have downloaded "bone-debian-8.6-iot-armhf-2016-11-06-4gb.img" from
> "https://beagleboard.org/latest-images", burned it into a microSD card,
> turned the card into a flasher, and flashed a Beagle Board Black with it.
>
> I understood reading "/boot/uEnv.txt" that enabling the following line
> should disable the HDMI pins:
> dtb=am335x-boneblack-overlay.dtb

that also disables the eMMC...

use:

dtb=am335x-boneblack-emmc-overlay.dtb

Regards,

--
Robert Nelson
https://rcn-ee.com/