Spinnaker SDK resets other miscellaneous USB devices on Ubuntu

Answered

Maren Eidal

• June 20, 2023 12:52

Hello, 

We are using a FLIR Blackfly S BFS-U3-16S2M-BD camera along with the Spinnaker SDK v. 3.0.0.118 on Ubuntu 20.04.6.

We have noticed that this function call in the Spinnaker SDK:

SystemPtrsystem = System::GetInstance();

causes a USB bus reset on devices other than the FLIR Blackfly camera when the device has been set up with the same bDeviceSubClass ( = 2) as the FLIR Blackfly.

 

Here is an outtake of lsusb for the FLIR Blackfly:

Bus 004 Device 005: ID 1e10:4000 Point Grey Research, Inc. Blackfly S BFS-U3-16S2M-BD
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.10
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0         9

 

And here is an outtake of the other device which will be reset by Spinnaker SDK: 

(Note: the vendor ID and product ID are just example values here)

Bus 003 Device 012: ID 0001:0002 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            239 Miscellaneous Device
  bDeviceSubClass         2 Abstract (modem)
  bDeviceProtocol         1 AT-commands (v.25ter)
  bMaxPacketSize0        64

Using the USB configuration for the device 0001:0002 above, the following is written in dmesg when the System::GetInstance() method is called:

[91553.692533] usb 4-2: reset SuperSpeed USB device number 12 using xhci_hcd
[91553.862078] usb 3-11: reset full-speed USB device number 61 using xhci_hcd

Where device number 61 is device 0001:0002. This reset causes serious unwanted behaviour in our system.

If we change the bDeviceClass to something other than 2, for instance to 0, then the device 0001:0002 is NOT reset by Spinnaker SDK, and our system works as expected.

 

Why does this happen? Thanks.

1

• Official comment

  

  TDY_Manuel

  Community team

  • June 20, 2023 13:36

  

  Hello Maren, 
  
  This looks like a known issue that we are already testing a fix for. There is a good chance this will be fixed in the next Spinnaker release. If you would like to test the fix yourself, could you please open a support ticket on https://flir.custhelp.com/app/ask ? 
  
  Best regards,

  Manuel 
• 

  TDY_Markus

  Community team

  • January 02, 2024 14:22

  

  

  Hi Nir,

  Spinnaker 4.x for Ubuntu should be online in early January.
  It has passed our testing procedures.

  Thanks,
  Markus

  1
• 

  TDY_Demos

  Community team

  • September 13, 2023 20:42

  

  For future reference, this issue would be resolved for the bug release (Spinnaker 3.2) and the feature release (Spinnaker 4.X).

  0
• 

  Nir Avneyon

  • December 31, 2023 19:40

  Hi,
  We Suffer from the USB devices reset in linux issue as well, I've seen that the Spinnaker 4 SDK is available only for windows right now, when can we expect an Ubuntu 22.04 + Python release to become available?
  Thank you.

  0

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