RealSense error calling rs2_pipeline_start(pipe:0x57bfa0)

[sandra-mf]

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Required Info
Camera Model	D400
Firmware Version	05.12.12.100
Operating System & Version	Linux
Kernel Version (Linux Only)	4.14.34-rt27-aimx6
Platform	emPC-A/iMX6
SDK Version	2.44.0
Language	C
Segment	Robot

RealSense error calling rs2_pipeline_start(pipe:0x57bfa0)

Hello,

I just compiled the librealsense libraries on my emPC-A/iMX6, but the examples seem not find my D435. I am using the original USB cable, although the USBs on the emPC-A/iMX6 are 2.0.

When I connect the camera, I get this with dmesg | grep 8086:
[32134.622781] usb 2-1.1: New USB device found, idVendor=8086, idProduct=0b07

But when I run pipe.start(); I get this error:
RealSense error calling rs2_pipeline_start(pipe:0x57bfa0):
No device connected

Can you help me?

[MartyG-RealSense]

Hi @sandra-mf The emPC-A/iMX6 is an industrial PC with a dedicated Linux kernel. I would therefore recommend building the librealsense SDK from source code with CMake using the build flag -DFORCE_RSUSB_BACKEND=true to bypass the kernel.

The RSUSB installation method installs librealsense over an internet connection and is not dependent on Linux versions or kernel versions and does not require kernel patching. The link below has instructions for performing this type of installation.

#6368 (comment)

[sandra-mf]

Hi !

Thank you very much for your answer, I recompiled it with the -DFORCE_RSUSB_BACKEND=true flag and now I get a different error :

15/04 16:41:10,109 ERROR [1759921232] (handle-libusb.h:95) failed to claim usb interface: 0, error: RS2_USB_STATUS_BUSY
terminate called after throwing an instance of 'rs2::error'
what(): failed to set power state

any idea?

[MartyG-RealSense]

Are you using a single camera or more than one camera on the computer, please?

[sandra-mf]

Just one camera, and I think the problem was that I was starting the pipeline twice. Sorry.
Now it is working
Thank you very much for the support!

[MartyG-RealSense]

No problem at all, I'm very pleased to hear that you found the solution. Thanks for the update!

[MartyG-RealSense]

Case closed due to solution achieved and no further comments received.