JetPack 4.2 cannot flash Nano

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

I used JetPack 4.2 to flash my Nano manually(SDK manager), and I had put an SD card into Nano and entered recovery mode.

JetPack log

3:46:09 INFO : ========== Choose an environment ==========
13:46:09 INFO : command finished successfully
13:46:09 ERROR : Jetson device is not in recovery mode.
13:46:09 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:09 INFO : command finished successfully
13:46:09 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:09 INFO : 0) Normal
13:46:09 INFO : 1) Jetson Nano
13:46:09 INFO : 2) Jetson TX2
13:46:09 INFO : 3) NXP IMX8M
13:46:09 INFO : 4) MTK MT7686
13:46:09 INFO : command finished successfully
13:46:09 ERROR : Jetson device is not in recovery mode.
13:46:19 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:19 INFO : command finished successfully
13:46:19 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:19 INFO : command finished successfully
13:46:19 ERROR : Jetson device is not in recovery mode.
13:46:19 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:19 INFO : command finished successfully
13:46:19 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:19 INFO : 0) Normal
13:46:19 INFO : 1) Jetson Nano
13:46:19 INFO : 2) Jetson TX2
13:46:19 INFO : 3) NXP IMX8M
13:46:19 INFO : 4) MTK MT7686
13:46:19 INFO : command finished successfully
13:46:19 ERROR : Jetson device is not in recovery mode.
13:46:20 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:20 INFO : command finished successfully
13:46:20 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:20 INFO : command finished successfully
13:46:20 ERROR : Jetson device is not in recovery mode.
13:46:20 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:20 INFO : command finished successfully
13:46:20 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:20 INFO : 0) Normal
13:46:20 INFO : 1) Jetson Nano
13:46:20 INFO : 2) Jetson TX2
13:46:20 INFO : 3) NXP IMX8M
13:46:20 INFO : 4) MTK MT7686
13:46:20 INFO : command finished successfully
13:46:20 ERROR : Jetson device is not in recovery mode.
13:46:21 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:21 INFO : command finished successfully
13:46:21 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:21 INFO : command finished successfully
13:46:21 ERROR : Jetson device is not in recovery mode.
13:46:21 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:21 INFO : command finished successfully
13:46:21 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:21 INFO : command finished successfully
13:46:21 ERROR : Jetson device is not in recovery mode.
13:46:22 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:22 INFO : command finished successfully
13:46:22 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:22 INFO : command finished successfully
13:46:22 ERROR : Jetson device is not in recovery mode.
13:46:22 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:22 INFO : command finished successfully
13:46:22 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:22 INFO : 0) Normal
13:46:22 INFO : 1) Jetson Nano
13:46:22 INFO : 2) Jetson TX2
13:46:22 INFO : 3) NXP IMX8M
13:46:22 INFO : 4) MTK MT7686
13:46:22 INFO : command finished successfully
13:46:22 ERROR : Jetson device is not in recovery mode.
13:46:22 DEBUG : running command < lsusb | grep “NVidia Corp” >
13:46:22 INFO : command finished successfully
13:46:22 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:22 INFO : 0) Normal
13:46:22 INFO : 1) Jetson Nano
13:46:22 INFO : 2) Jetson TX2
13:46:22 INFO : 3) NXP IMX8M
13:46:22 INFO : 4) MTK MT7686
13:46:22 INFO : command finished successfully
13:46:22 ERROR : Jetson device is not in recovery mode.
13:46:43 INFO : Device Mode Host Setup in Flash : install ‘Device Mode Host Setup in Flash’ Skipped
13:46:43 INFO : Flash Jetson Nano : install ‘Flash Jetson Nano’ Skipped
13:46:46 INFO : Device Mode Host Setup in Target SDK : install ‘Device Mode Host Setup in Target SDK’ Skipped
13:46:46 INFO : DateTime Target Setup : install ‘DateTime Target Setup’ Skipped
13:46:46 INFO : CUDA Toolkit for L4T : install ‘CUDA Toolkit for L4T’ Skipped
13:46:46 INFO : cuDNN on Target : install ‘cuDNN on Target’ Skipped
13:46:46 INFO : TensorRT on Target : install ‘TensorRT on Target’ Skipped
13:46:46 INFO : OpenCV on Target : install ‘OpenCV on Target’ Skipped
13:46:46 INFO : VisionWorks on Target : install ‘VisionWorks on Target’ Skipped
13:46:46 INFO : Multimedia API : install ‘Multimedia API’ Skipped
13:46:48 INFO : All done!

0955:7020 doesn’t match Nano’s

Bus 001 Device 046: ID 0955:7f21 NVidia Corp.

Environment

Distributor ID: Ubuntu
Description: Ubuntu 16.04.6 LTS
Release: 16.04
Codename: xenial

2

Hi lonesomesnow,

Please make sure your Jetson-nano is really into recovery mode.
See comments from Stephen: https://devtalk.nvidia.com/default/topic/1048660/jetson-tx2/i-can-t-install-jetpack-4-2-sdk-on-my-tx2/post/5328041/#5328041

Following above steps and still get the same error, please try flash Jetson-Nano by manually:

Copy the image to your sdcard first
Put device into recovery mode
Flash with below command:
$ sudo ./flash.sh jetson-nano-qspi-sd mmcblk0p1

SDCard image: http://developer.nvidia.com/embedded/dlc/jetson-nano-dev-kit-sd-card-image
User guide: https://developer.nvidia.com/embedded/dlc/jetson-nano-dev-kit-user-guide

3

Flashing Nano with flash.sh → OK
JetPack → failed

4

Hi lonesomesnow,

If you still can’t using SDK manager to flash Jetson-Nano, you can try using a graphical program like Etcher.
Please reference this link: [url]https://developer.nvidia.com/embedded/learn/get-started-jetson-nano-devkit#write[/url]
OR flashing by manually is fine.

5

Using flash.sh, dd, or Etcher can flash Nano, but I’m confused about what’s the correct DID when Nano is in recovery mode? JetPack tries to get 0955:7020 but my Ubuntu shows Nano is 0955:7f21
Thanks!

6

Hi lonesomesnow,

The correct ID for recovery mode is 0955:7f21. The 0955:7020 is used for usb-device mode.
Can you please run “lsusb | grep -e NVidia -e 0955” and paste the output? Seems you have multiple Jetson devices connected to host machine at the same time, and SDKM has a bug in handling them.

7

$ lsusb | grep ‘0955’

Bus 001 Device 046: ID 0955:7f21 NVidia Corp.

Only one Nvidia device is connected to my computer.

8

From the first log, I can see below lines. Do you have any idea why 0) to 4) are listed? Can you please zip and attach the full ~/.nvsdkm directory?
13:46:20 DEBUG : running command < lsusb | grep 0955:7020 >
13:46:20 INFO : 0) Normal
13:46:20 INFO : 1) Jetson Nano
13:46:20 INFO : 2) Jetson TX2
13:46:20 INFO : 3) NXP IMX8M
13:46:20 INFO : 4) MTK MT7686

9

0)…4) is a script I called in bashrc to help me set a working environment.
I have no Nano on hand now, I borrowed it from an Agent and have given it back just now.
I will check if my script affects JetPack execution after getting my own Nano.
Thanks!

10

I removed my script and tried it again, and it worked.
Thanks a lot!