Hi,
I’m currently utilizing 2 zed-2i and 1 zed-mini on usb 3.0, 3.0, 4.0 respectively on z870 board with 9950x3d and rtx 5090
i can see the cam on ZED_Explorer, but failed to open cam in my application, as well as ZED_Depth_Viewer. All cams are plugged with USB 3.0 Type-C Cable 4m and USB 3.0 Type-C Dual Screw Locking Cable 3m purchased with cameras.
no errors were on ZED_Diagnotics
Hi @kim-hansol314
Welcome to the Stereolabs community.
We need more details about your device’s status and system configuration to gain a clearer insight into the cause of your issue.
Could you connect the camera to the USB3 port, launch the ZED Diagnostic tool, and send the report file it produces?
it shows warning that new user can’t upload files
Please connect and test one camera at a time.
Please also connect the three cameras simultaneously and send me the output of the commands
lsusb -d 2b03:
and
lsusb -d 2b03: -t -v
[2026-01-19 13:20:03 UTC][ZED][INFO] Logging level INFO
[2026-01-19 13:20:06 UTC][ZED][INFO] Using USB input… Switched to default resolution HD720
[2026-01-19 13:20:07 UTC][ZED][ERROR] [Init] Unable to capture images. Consider trying a lower resolution and/or FPS
[2026-01-19 13:20:07 UTC][ZED][ERROR] LOW USB BANDWIDTH in sl::ERROR_CODE sl::open(sl::InitParameters)
all three cams omitted same error on ZED_Depth_Viewer when I connected and tested one camera at a time.
below is result of lsusb -d 2b03: and lsusb -d 2b03: -t -v
(robot2) itamp5090@itamp5090-MS-7E59:~$ lsusb -d 2b03:
Bus 003 Device 015: ID 2b03:f881 STEREOLABS ZED-2i HID INTERFACE
Bus 003 Device 017: ID 2b03:f881 STEREOLABS ZED-2i HID INTERFACE
Bus 003 Device 018: ID 2b03:f681 STEREOLABS ZED-M HID Interface
Bus 004 Device 006: ID 2b03:f880 STEREOLABS ZED 2i
Bus 004 Device 007: ID 2b03:f880 STEREOLABS ZED 2i
Bus 004 Device 008: ID 2b03:f682 STEREOLABS ZED-M camera
(robot2) itamp5090@itamp5090-MS-7E59:~$ lsusb -d 2b03: -t -v
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/12p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 012: Dev 002, If 0, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 1, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 2, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 3, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 4, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 5, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 6, Class=Audio, Driver=snd-usb-audio, 480M
ID 0db0:cd0e Micro Star International
|__ Port 012: Dev 002, If 7, Class=Human Interface Device, Driver=usbhid, 480M
ID 0db0:cd0e Micro Star International
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/5p, 20000M/x2
ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/12p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 001: Dev 016, If 0, Class=Hub, Driver=hub/2p, 480M
ID 0424:2512 Microchip Technology, Inc. (formerly SMSC) USB 2.0 Hub
|__ Port 002: Dev 017, If 0, Class=Human Interface Device, Driver=usbhid, 12M
ID 2b03:f881 STEREOLABS
|__ Port 003: Dev 014, If 0, Class=Hub, Driver=hub/2p, 480M
ID 0424:2512 Microchip Technology, Inc. (formerly SMSC) USB 2.0 Hub
|__ Port 002: Dev 015, If 0, Class=Human Interface Device, Driver=usbhid, 12M
ID 2b03:f881 STEREOLABS
|__ Port 004: Dev 018, If 0, Class=Human Interface Device, Driver=usbhid, 12M
ID 2b03:f681 STEREOLABS ZED-M HID Interface
|__ Port 009: Dev 007, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
ID 04d9:1836 Holtek Semiconductor, Inc.
|__ Port 009: Dev 007, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
ID 04d9:1836 Holtek Semiconductor, Inc.
|__ Port 010: Dev 008, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
|__ Port 011: Dev 009, If 0, Class=Human Interface Device, Driver=usbhid, 12M
ID 0db0:0076 Micro Star International
|__ Port 012: Dev 010, If 0, Class=Wireless, Driver=btusb, 12M
ID 0489:e10a Foxconn / Hon Hai
|__ Port 012: Dev 010, If 1, Class=Wireless, Driver=btusb, 12M
ID 0489:e10a Foxconn / Hon Hai
/: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 001: Dev 007, If 0, Class=Video, Driver=uvcvideo, 5000M
ID 2b03:f880 STEREOLABS
|__ Port 001: Dev 007, If 1, Class=Video, Driver=uvcvideo, 5000M
ID 2b03:f880 STEREOLABS
|__ Port 003: Dev 006, If 0, Class=Video, Driver=uvcvideo, 5000M
ID 2b03:f880 STEREOLABS
|__ Port 003: Dev 006, If 1, Class=Video, Driver=uvcvideo, 5000M
ID 2b03:f880 STEREOLABS
|__ Port 004: Dev 008, If 0, Class=Video, Driver=uvcvideo, 5000M
ID 2b03:f682 STEREOLABS ZED-M camera
|__ Port 004: Dev 008, If 1, Class=Video, Driver=uvcvideo, 5000M
ID 2b03:f682 STEREOLABS ZED-M camera
/: Bus 005.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 006.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 20000M/x2
ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 007.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 008.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 009.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 010.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 011.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/1p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 012.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/0p, 5000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
You connected 3 USB3 cameras to the same USB3 channel, this is not allowed because of bandwidth and power limitations.
If your mother board provides only a single USB3 channel, you need a PCI expansion board with multiple USB3 controller like this one:
Shouldn’t it work on a single camera if single channel is a problem?
first written error occured with only one camera connected.
Please connect one camera, run ZED Diagnostic and send the report.
ZED_Diagnostic_Results1.json (6.4 KB)
ZED_Diagnostic_Results2.json (6.5 KB)
ZED_Diagnostic_Results3.json (6.5 KB)
Here’s the report for zed mini, and two zed 2i diagnostic report
The Diagnostic reports show something weird.
All the cameras are indeed detected, but the ZED SDK is not opening them.
Can you please try to open the raw stream of the camera using a webcam application? (e.g. guvcview, cheese)
raw stream works just fine.
i tried on a different pc with same component with just different motherboard, which has usb 3.1 gen2.
most port showed same issue, while one c-port and usb 3.1 gen2 managed to work, but still failed to use three cams simultaneously
As I said before, three cameras are never supported.
When using USB3.1 Gen2, the bus switches to USB 3.0 compatible mode, so the available bandwidth is the same as USB3 Gen.1
the other pc I tried on has two different USB channel and two cams connection was only successful on condition when they were connected on specific port on the same channel, while the other channel was never successful on two / three cams connection