Upgrading from JP 4.6.3 to JP 5.1.2 - CPU Bootloader is not running on device Error

We are having trouble upgrading our AGX Xavier SOMs from JP 4.6.3 to the latest version JP 5.1.2. We are using custom config & pinmux files that can be flash successfully with 4.6.3 via command line (sudo ./flash.sh umc-gpgpu mmcblk0p1).

I have downloaded the AGX Jetpack 5.1.2 and setup the directory (just like in 4.6.3). I have copied over the custom configuration files from the successful 4.6.3 directory into the 5.1.2 directory.

When I try to flash the JP5.1.2. via the same ./flash command, I receive a ‘CPU Bootloader is not running on device error’ after some time like before and then fails to flash:

[1017.3453] tegrarcm_v2 –isapplet
[2033.1633] tegradevflash_v2 –iscpubl
[2033.1633] CPU Bootloader is not running on device.
[3049.9629] tegrarcm_v2 –isapplet
[4064.7695] tegrarcm_v2 –ismb2

If I try to just flash directly using the SDK Manager, I receive an ID, Version, SKU error as seen below. How can I use my configuration files from my working 4.6.3 install in the new JetPack 5.1.2? I placed the files in the correct location, same as in 4.6.3, /bootloader, /bootloader/t186ref/BCT/, etc.


what do you get from serial console log during flashing?
Also, are you sure changes in device tree/pinmux are the same across 4.6.3 and 5.1.2?


Attached is the failed flash log.

jp512_flash_log_fail.txt (35.1 KB)

Also, the changes I copied from 4.6.3 to the 5.1.2 were the files:
tegra19x-umc-gpgpu.cfg (pinmux change)
tegra19x-umc-gpgpu-padvoltage.cfg (pinmux change)
umc-gpgpu.conf (my custom configuration file that mentions the above files)

That file looks like:
source “${LDK_DIR}/p2972-0000.conf.common”;

CMDLINE_ADD=“console=ttyTCU0,115200n8 fbcon=map:0 net.ifnames=0 rootfstype=ext4 loglevel=9”;

And I placed those files in the same location on 5.1.2 as they were on 4.6.3. Am I missing any files that I need to copy over?


we need the UART log from the device side, but not flashing log from the host side.
The serial console on AGX Xavier is available with the micro USB port.

Unfortunately, this is not on the Dev kit, but on a production SoM, so there is not a micro USB port.
I am using minicom on the host side (Ubuntu 18.04) to get console access into the AGX Xavier SoM. I’ll see if I can find a way to capture that output during the flash.

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