tegra rcm reboot command doesn't work

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX1
1 
$ sudo ./tegrarcm --reboot coldboot --instance /dev/bus/usb/001/021
Failure to recognize USB device located at /dev/bus/usb/001/021
USB communication failed.Check if device is in recovery

$ lsusb | grep NVidia
Bus 001 Device 021: ID 0955:7721 NVidia Corp.

$ ls /dev/bus/usb/001/
001  002  003  004  021

I am trying to automate some producntion required stuff, I am unable to get the system rebooted back into ubuntu

2

hello hari_seenivasan,

would like to have more details about your environment, setup, and steps.
also, why you use tegrarcm to perform the reboot procedure?
thanks

3

For the infrastructure we have for production, we would like to get into a device’s revcovery mode write an OS cloned image and reboot back to tegra ubuntu.

This needs to be automated with a script in such a way that it would sense a relevent usb device attached and do its job.

say script would do following assuming tegra device is attached in non-recovery mode at /001/021

  1. sudo ./tegrarcm --reboot recovery --instance /dev/bus/usb/001/021
  2. sudo ./tegraflash.py --bl cboot.bin --applet nvtboot_recovery.bin --chip 0x21 --cmd “write APP cloned_system.img”
  3. sudo ./tegrarcm --reboot coldboot --instance /dev/bus/usb/001/021

I am currently unable to perform steps 1 & 3. Otherwise please suggest alternatives.

4

hello hari_seenivasan,

would like to check the first step, what’s the scenario of your device?
did these device boot-up with default OS and you would like to flash your own?
will below commands helps?

sudo reboot --force forced-recovery
5

Hi @JerryChang

The command you gave me is from device, but I want to use it from a USB connected host.

6

hello hari_seenivasan,

did your device have chance to connected with ehternet?
these can be done by SSH, please check below example.

ssh nvidia@1.1.1.1 "sudo -S reboot --force forced-recovery"
7

Device is not connected to ethernet or any network.

Btw this is to address the problem of flashing multiple devices connected to a host via USB at once.

Is there a way to trigger this from host and nothing from device atall?
Also what is a solution to my step 3?

8

hello hari_seenivasan,

current Jetson devices cannot be forced into recovery mode from the host.
suggest to design access to the power/reset/recovery pins on your custom baseboard (either the product board, or the custom baseboard use for flashing), and toggle those pins (power, reset, recovery) prior to flashing.
thanks