Zed Mini IMU detected but getting NaN

snktshrma · April 15, 2026, 7:30am

Hi, I have ZED Mini. I get stable camera frames, depth and related functionality is working well. But I am getting invalid data from IMU, specifically NaNs.
**
ZED SDK: 5.2.3**

I tried re-calibrating/resetting using:

$ ZED_Calibration --cimu
 
→ ZED-M Found
############## Starting Calibration … Camera must stay still… please wait until finished ##############
Opening Camera IMU… SUCCESS
 → OLD Bias Gyro : 0 0 0 rad/s
Starting capture…
In progress… 0 %
In progress… 10 %
In progress… 20 %
In progress… 30 %
In progress… 40 %
In progress… 50 %
In progress… 60 %
In progress… 70 %
In progress… 80 %
In progress… 90 %

>>>> Calibration Err Code: 0
 → NEW Bias Gyro : 0 0 0 rad/s

Done… IMU bias has been recalibrated

ZED Diagnostics passes successfully (at least on front end).

Here’s result of sudo udevadm monitor when connecting camera to my PC:

$ sudo udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[9298.549768] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3 (usb)
KERNEL[9298.550995] change   /devices/pci0000:00/0000:00:14.0/usb3/3-3 (usb)
KERNEL[9298.551083] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0 (usb)
KERNEL[9298.551871] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:2B03:F681.003D (hid)
KERNEL[9298.551967] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/usbmisc/hiddev0 (usbmisc)
KERNEL[9298.552076] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:2B03:F681.003D/hidraw/hidraw1 (hidraw)
KERNEL[9298.552114] bind     /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:2B03:F681.003D (hid)
KERNEL[9298.552146] bind     /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0 (usb)
KERNEL[9298.552181] bind     /devices/pci0000:00/0000:00:14.0/usb3/3-3 (usb)
UDEV  [9298.560857] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3 (usb)
UDEV  [9298.563403] change   /devices/pci0000:00/0000:00:14.0/usb3/3-3 (usb)
UDEV  [9298.565062] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0 (usb)
UDEV  [9298.565681] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:2B03:F681.003D (hid)
UDEV  [9298.566058] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/usbmisc/hiddev0 (usbmisc)
UDEV  [9298.567284] add      /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:2B03:F681.003D/hidraw/hidraw1 (hidraw)
UDEV  [9298.567619] bind     /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:2B03:F681.003D (hid)
UDEV  [9298.567993] bind     /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0 (usb)
UDEV  [9298.569796] bind     /devices/pci0000:00/0000:00:14.0/usb3/3-3 (usb)
KERNEL[9298.669870] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3 (usb)
KERNEL[9298.671948] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0 (usb)
KERNEL[9298.674579] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/video4linux/video0 (video4linux)
KERNEL[9298.674590] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/video4linux/video1 (video4linux)
KERNEL[9298.674598] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/media0 (media)
KERNEL[9298.674608] bind     /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0 (usb)
KERNEL[9298.674775] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.1 (usb)
KERNEL[9298.674784] bind     /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.1 (usb)
KERNEL[9298.674796] bind     /devices/pci0000:00/0000:00:14.0/usb4/4-3 (usb)
UDEV  [9298.677036] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3 (usb)
UDEV  [9298.677754] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0 (usb)
UDEV  [9298.678034] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.1 (usb)
UDEV  [9298.678558] bind     /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.1 (usb)
UDEV  [9298.678918] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/media0 (media)
UDEV  [9298.681130] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/video4linux/video0 (video4linux)
UDEV  [9298.681379] add      /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0/video4linux/video1 (video4linux)
UDEV  [9298.681879] bind     /devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3:1.0 (usb)
UDEV  [9298.683563] bind     /devices/pci0000:00/0000:00:14.0/usb4/4-3 (usb)

$ lsusb -t
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/1p, 480M
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/16p, 480M
|__ Port 001: Dev 010, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 001: Dev 010, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 001: Dev 010, If 2, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 001: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 003: Dev 012, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 004: Dev 004, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 004: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 005: Dev 005, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 005: Dev 005, If 1, Class=Video, Driver=uvcvideo, 480M
|__ Port 007: Dev 006, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 008: Dev 007, If 0, Class=Vendor Specific Class, Driver=[none], 12M
|__ Port 008: Dev 007, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 014: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 014: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/8p, 20000M/x2
|__ Port 003: Dev 005, If 0, Class=Video, Driver=uvcvideo, 5000M
|__ Port 003: Dev 005, If 1, Class=Video, Driver=uvcvideo, 5000M

$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 004: ID 3554:fc00 Compx 2.4G Receiver
Bus 003 Device 005: ID 0c45:6725 Microdia Integrated_Webcam_HD
Bus 003 Device 006: ID 187c:0550 Alienware Corporation LED controller
Bus 003 Device 007: ID 0d62:3740 Darfon Electronics Corp.
Bus 003 Device 008: ID 8087:0026 Intel Corp. AX201 Bluetooth
Bus 003 Device 010: ID 046d:c548 Logitech, Inc. Logi Bolt Receiver
Bus 003 Device 012: ID 2b03:f681 STEREOLABS ZED-M HID Interface
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 005: ID 2b03:f682 STEREOLABS ZED-M camera

And here’s the result of sensor data script:

Sample 288

IMU:
Timestamp : {1775837433254}
Orientation: {-nan -nan -nan -nan}
Acceleration: {-nan -nan -nan} [m/sec^2]
Angular Velocitiy: {-nan -nan -nan} [deg/sec]
Sample 289

IMU:
Timestamp : {1775837433264}
Orientation: {-nan -nan -nan -nan}
Acceleration: {-nan -nan -nan} [m/sec^2]
Angular Velocitiy: {-nan -nan -nan} [deg/sec]
Sample 290

IMU:
Timestamp : {1775837433273}
Orientation: {-nan -nan -nan -nan}
Acceleration: {-nan -nan -nan} [m/sec^2]
Angular Velocitiy: {-nan -nan -nan} [deg/sec]
Sample 291

IMU:
Timestamp : {1775837433283}
Orientation: {-nan -nan -nan -nan}
Acceleration: {-nan -nan -nan} [m/sec^2]
Angular Velocitiy: {-nan -nan -nan} [deg/sec]
Sample 292

IMU:
Timestamp : {1775837433294}
Orientation: {-nan -nan -nan -nan}
Acceleration: {-nan -nan -nan} [m/sec^2]
Angular Velocitiy: {-nan -nan -nan} [deg/sec]

Thanks

BenjaminV · April 15, 2026, 1:42pm

Hi,

Is it possible for you to record a SVO file and share it with us ? It would help us understand the root cause of the issue.

If you don’t want to share it publicly here, you can send it to support@stereolabs.com

Thanks.

snktshrma · April 16, 2026, 1:33pm

Hi @BenjaminV , Thanks for your reply! I have just sent a mail with SVO file attached.

Thanks

BenjaminV · April 16, 2026, 2:09pm

Thanks for the svo. Indeed it seems the imu is not detected at all.

Did you ever managed to get imu data or are you facing this issue since the beginning?

It can also be a cable issue. You can try to change the USB port (make sure it’s usb 3.0) or even use another cable if you have one.

snktshrma · April 16, 2026, 2:34pm

@BenjaminV I am facing this issue since the beginning. I tried a lot of different wires but no luck.

Myzhar · April 23, 2026, 1:35pm

Hi @snktshrma
can you try to open the ZED Sensor Viewer application and let me know if you can see Inertial Data streams?

snktshrma · April 23, 2026, 3:04pm

Hi @Myzhar ! I tried it but no luck. Can’t see any inertial data on that either… I am kinda stuck at this point

Myzhar · April 27, 2026, 10:35am

If the camera is still covered by warranty, please send an email to support@stereolabs.com with a link to this discussion.