USB Issue with lsusb linux command

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin NX
1

Hi,
I have a Jetson Orin NX board running Ubuntu 22.04.5 LTS.
I’m encountering an issue where when I run the lsusb -v command to get information about connected devices, it takes a long time to respond, sometimes up to 8 seconds.
The issue worsens if I connect any testing equipment with wire harnesses to this unit (Jetson Orin NX), resulting in even longer response times. Have you encountered such a phenomenon?

Thanks,
Artium.

2

Is this a Orin Nano devkit or a custom board?
Is this only happened when you connect to a specific usb device?

If you don’t know the meaning of my question, please also let me know.

3
  1. yes this is a custom board, hosting a Orin NX SOM.
  2. no its not a specific USB device.
4

I want to mention that when this lsusb delay occurs, the file transactions to and from the device work fine and are fast.

5

Is your situation able to reproduce on NV devkit?

I didn’t hear any of such issue reported by other end users before.

6

We have conducted some research on the issue and encountered the following phenomena:

  1. When we connect the OrinNX directly to the USB via our cable (harness), we do not encounter any particular problems.
  2. When we connect the OrinNX to the USB HUB via our cable (harness), we encounter the following issues:
  • When connecting to two or more devices, the operating system slows down, the mouse movement is not smooth, and windows do not move smoothly.
  • Running lsusb sometimes executes quickly and sometimes slowly; additionally, sometimes one of the devices is not recognized.

The main problem is that the connection does not seem stable. We are trying to understand if there is something in the OrinNX drivers that could be affecting these issues.

Is there any known issue with OrinNX working with a USB HUB?

7

Actually Orin Nano devkit directly has a USB hub on it integrated in the carrier board.
Which means if you are using a Orin NX devkit (same as Orin Nano), then USB hub usecase is running every time. But as I said before, we don’t see such issue before and even in my daily usage.

8

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