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Failed to read busnum/devnum on D435i Camera

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Kanakshilledar111

Hi!
I am trying to interface the realsense D435i camera with the UP Xtreme Edge Compute Enabling Kit. For the operating system I am using Ubuntu 22.04 with kernel version: 5.15.0-101-generic

I followed the getting started page for installation on linux. I didnt compile from source but used the package managers to install the librealsense2.

After installing librealsense2-dkms and librealsense2-utils I performed a reboot and tried running the modinfo

$ modinfo uvcvideo | grep "version:"

version:        1.1.1-realsense-1.3.26

srcversion:     17372510070FF8B0D2AA6AC

After this I tried running realsense-viewer but I am getting the following error

$ realsense-viewer 

 28/03 15:55:51,718 INFO [140073350174592] (backend-v4l2.cpp:657) Enumerating UVC video0 realpath=/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/video4linux/video0

 28/03 15:55:51,819 INFO [140073350174592] (backend-v4l2.cpp:657) Enumerating UVC video1 realpath=/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/video4linux/video1

 28/03 15:55:51,819 INFO [140073350174592] (backend-v4l2.cpp:657) Enumerating UVC video2 realpath=/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/video4linux/video2

 28/03 15:55:51,819 INFO [140073350174592] (backend-v4l2.cpp:657) Enumerating UVC video3 realpath=/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/video4linux/video3

 28/03 15:55:51,819 INFO [140073350174592] (backend-v4l2.cpp:657) Enumerating UVC video4 realpath=/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.3/video4linux/video4

 28/03 15:55:51,819 INFO [140073350174592] (backend-v4l2.cpp:657) Enumerating UVC video5 realpath=/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.3/video4linux/video5

 28/03 15:55:51,822 INFO [140073350174592] (backend-hid.cpp:1175) Failed to read busnum/devnum. Device Path: /sys/bus/iio/devices/iio:device0

I am using the USB-C cable which comes with the realsense camera and I have connected it to the USB3.2 interface of my UP Board.

How can I solve this issue?

Thanks!

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3 comments

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  • MartyG

    Hi Kanakshilledar111  The error Failed to read busnum/devnum is a very rare one.  In the past it has usually occurred when using RealSense cameras with low-power computing boards that have been unable to supply the camera through the USB port with sufficient power to meet its needs. 

     

    A solution has been to use a mains electricity powered USB 3 hub and attach the camera to the hub instead of plugging it directly into the computing device's USB port.

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  • Kanakshilledar111

    Alright! I tried connecting it to my laptop and it is working fine. So I will try to get a power USB 3 hub.

    You can mark the above comment as resolved!

    Thanks

     

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  • MartyG

    You are very welcome.  I'm pleased that I was able to help.  :)

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