MassFlash issue in TX2

Autonomous Machines Jetson & Embedded Systems Jetson TX2
,
1

Hi,
I created the massflashimage with
sudo ./nvmassflashgen.sh jetson-tx2 mmcblk0p1
created the image. But after creating this the board is not accessible.

Though the board is seems to be in REC mode, as per below command,

Linux_for_Tegra$ lsusb -d 0955:7c18
Bus 002 Device 031: ID 0955:7c18 NVidia Corp.
user-jrth@userjrth-Latitude-E6420:~/Desktop/Linux_for_Tegra$

But flash.sh script fails.
Linux_for_Tegra$ sudo ./flash.sh -r -k kernel-dtb jetson-tx2 mmcblk0p1
###############################################################################

L4T BSP Information:

R32 , REVISION: 3.1

###############################################################################
Error: probing the target board failed.
Make sure the target board is connected through
USB port and is in recovery mode.
Linux_for_Tegra$

WHy is the above behavior?
then after massflash image creation, why the board is not rebooting?

BR

2

Were you using a VM? USB disconnects and reconnects during a flash, and VMs usually have improper handling and the parent o/s takes the USB back. If not using a VM, were you using the supplied micro-B USB cable, or a charger cable?

3

I am using the supplied USB cable.
I am not using VM. It is Ubuntu host machine with 18.04

4

In that case, if the mass flash was otherwise set up correctly, it should work. Normally failure to identify the board is associated with a VM. On the other hand, I don’t know enough about mass flash to further debug, but is it possible the flash completed and it is just looking for another to flash? I only have one TX2 so I cannot test mass flash, and I am unsure if a mass flash offers to flash another after completing a flash (and completing a flash reboots the Jetson so it is no longer in recovery mode).

6

hello jk.t,

may I have your confirmation as below.

would you like to perform flashing to multiple Jetson devices simultaneously?
or, you would like to update kernel-dtb partition with the flash script?

7

Jerry,
Actually both.
Yes, we like to perform flashing to multiple devices. But initially I tried with single board.
At times when we change the device tree fles, we do update kernel-dtb.

Now, in this issue, I tried this flash script for flashing single board.

8

hello jk.t,

  1. $ sudo ./flash.sh -r -k kernel-dtb jetson-tx2 mmcblk0p1 this commands should works for update device tree partition. however, since it’s a partial update, had you perform a whole flash to flash the default image already?

  2. could you please have a try to generate system images “offline” by specify the board information.
    you may refer to documentation README_Massflash.txt located in the same folder for the instructions.
    please also enable “–showlogs” options to gather more details.
    for example, $ sudo ./nvmflash.sh --showlogs

9

$ sudo ./flash.sh -r -k kernel-dtb jetson-tx2 mmcblk0p1` this commands should works for update device tree partition. however, since it’s a partial update, had you perform a whole flash to flash the default image already?

Yes I did.

could you please have a try to generate system images “offline” by specify the board information.
you may refer to documentation README_Massflash.txt located in the same folder for the instructions.
please also enable “–showlogs” options to gather more details.
for example, $ sudo ./nvmflash.sh --showlogs.

I already followed that instruction and during that only I came across the issue specified in this post.

10

hello jk.t,

assume you’re able to flash the board with the following, $ sudo ./flash.sh -r jetson-tx2 mmcblk0p1
it has the same approach to parse board information.

may i have your confirmation,
thanks

11

yes I can flash using flash.sh script.

13

hello jk.t,

it should be JetPack-4.4 DP release bug that nvmassflash not functional, which works with JP-4.3.
we’re tracking this internally, will update the status after we come out conclusions.

BTW,
could you please have a try to update massflash script files as following for testing.
thanks

--- a/massflash/nvmassflashgen.sh
+++ b/massflash/nvmassflashgen.sh
@@ -722,6 +722,9 @@ gen_param()
                                i=$((i+1));
                                continue;
                        fi;
+                       if [[ ${a[$i]} =~ ^\-\- ]]; then
+                               break;
+                       fi;
                        na=`echo "${a[$((i+1))]}" | cut -d'.' -f1`;
                        suf=`echo "${a[$((i+1))]}" | cut -d'.' -f2`;
                        blobxmltxt+="<file name=\"";
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