No RealSense devices were found after Reboot [Unitree A1]

[Jellal-17]

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Required Info
Camera Model	D435i
Firmware Version	2.55
Operating System & Version	Ubuntu 18.04
Kernel Version (Linux Only)	4.90
Platform	Nvidia Jetson Xavier NX
SDK Version	2
Language	-
Segment	Robot

Issue Description

Hello, I have a similar problem to this issue, though it is a bit further along the line. Replying to the comment, I have killed a process 'RobotVision', which is something the robot broadcasts through it's network, that was using the camera stream. It worked then. But after reboot, no matter what I do, the SDK doesn't detect the camera. I tried reinstalling the SDK, following some of the issues here and as the previous time, it worked before a reboot and the loop continues. So, the output of rs-enumerate-devices is No device detected. Is it plugged in?.

I have also tried this, for the installation of the ROS wrapper, I have used this method 2.

[MartyG-RealSense]

Hi @Jellal-17 In rare cases the camera may not be detected after a reboot, but is detected if the computer is shut down and then restarted with the power button. Have you tried a shutdown and boot from the power button to see whether it makes a difference to camera detection, please?

[Jellal-17]

Hello @MartyG-RealSense, Sorry for the late reply.

Yes, I did switch it off from the power button and boot it. It was the same issue.
There is a way to not start the other processes right from the boot, so I will try to do that and update here. But for now, it's the same.

[Jellal-17]

@MartyG-RealSense,

I’ve removed the 'RobotVisionSystem' process from startup, and everything is working fine now. I will go ahead and close the issue.

For Future Reference

If you are developing on the Unitree A1 for low-level control and need to access the camera, follow these steps:

Navigate to the RobotVisionSystem directory: cd RobotVisionSystem
Open the start.sh file: gedit start.sh and Comment out the last line.

Restart the robot and check with: realsense-viewer

Alternatively, if you only need to access the camera for the current session:
Find the process: ps -aux | grep RobotVisionSystem
Kill the process: kill -9 ####

However, please note that killing the process might only work for a limited number of reboots. In my case, it stopped working after the first reboot, so I recommend the first method for a more permanent solution.

[MartyG-RealSense]

It's great to hear that you achieved a solution, @Jellal-17 - thanks very much for the update and for sharing the details of your solution!