Troubleshooting Q&A

Wiki ▸ Troubleshooting Q&A

Camera not working\detected

• How do I see which Intel RealSense cameras are connected?
• I connected the camera to the USB port but it is not recognized
• I'm using a virtual machine and the camera is not working
• Camera gets stuck\hangs on windows

Installation

• GCC Internal Error
• I ran the udev rules script but Linux still get Permission denied
• dmesg shows: uvcvideo: module verification failed: signature and/or required key missing - tainting kernel
• sudo modprobe uvcvideo produces dmesg: uvc kernel module is not loaded
• ubuntu-xenial.sh script fails with fatal error: openssl/opensslv.h
• How do I enable librealsense logs?
• Fatal error: libudev.h: when building from sources

Git

• Git returns access timeout when I try to clone the repository

Python

• CMake shows an error when I try to build with Python bindings

Calibration

• D400 Series Dynamic Calibration Software Tools

---

Camera not working\detected

Q: How do I see which Intel RealSense cameras are connected?

Linux:

$ lsusb | grep 8086

Windows:

1. Click the Win-Key+X keys
2. Choose Device Manager
3. Look under Imaging devices for "Intel RealSense" cameras

Q: I connected the camera to the USB port but it is not recognized

❗️ Make sure your camera is connected using USB 3.0 ❗️

If your camera is connected via USB 3.0, check to make sure your OS detects the camera (how?). The camera will not work without USB 3.0 (or higher)

Q: I'm using a virtual machine and the camera is not working

Due to the USB 3.0 translation layer between native hardware and virtual machine, the librealsense team does not support installation in a VM. If you do choose to try it, we recommend using VMware Workstation Player, and not Oracle VirtualBox for proper emulation of the USB3 controller.

Q: Camera gets stuck\hangs on windows

Related issues: Issue #303, Issue #129

When working on Windows 8.1, make sure you have KB3075872 and KB2919355 installed.

These patches address issues with Windows 8.1 video drivers. These issues are resolved in Windows 10 and no additional patches are required when using Windows 10.

Installation

Q: Fatal error: libudev.h: when building from sources

From version 2.9.0 a new dependency third-party package libudev-dev has to be installed: sudo apt-get install libudev-dev See Release Notes for v2.9.0

Linux:

Q: How do I enable librealsense logs?

To change the log level of LibRealSense logger, you need to set a local variable named LRS_LOG_LEVEL and initialize it with the desirable log level:

Linux:

$ export LRS_LOG_LEVEL="<Log Level>"

Windows:

> set LRS_LOG_LEVEL="<Log Level>"

<Log Level> can be either DEBUG, INFO, WARNING, ERROR or FATAL

Q: GCC Internal Error

The gcc compiler issues the following error while compiling:

gcc: internal compiler error

This might indicate that you do not have enough memory or swap space on your machine. Try closing memory consuming applications, and if you are running inside a VM increase available RAM to at least 2 GB.

Q: I ran the udev rules script but Linux still get Permission denied

First, try re-installing udev rules located in librealsense source directory: sudo cp config/99-realsense-libusb.rules /etc/udev/rules.d/ sudo udevadm control --reload-rules && udevadm trigger

If the issue persists, the cause might be due to the fact that your user is not part of the plugdev group.

Q: dmesg shows: uvcvideo: module verification failed: signature and/or required key missing - tainting kernel

This is a standard warning issued since Kernel 4.4-30+, it is only a notification and does not affect module's functionality.

Q: sudo modprobe uvcvideo produces dmesg: uvc kernel module is not loaded

This issue is caused since the patched module kernel version is incompatible with the resident kernel. Verify the actual kernel version with uname -r. Revert and proceed from Make Ubuntu Up-to-date step from the Linux installation guide.

Q: ubuntu-xenial.sh script fails with fatal error: openssl/opensslv.h

This is usually caused due to a missing dependency. Install openssl package from Video4Linux backend preparation step

Git

Q: Git returns access timeout when I try to clone the repository

git.launchpad... access timeout

This usually happens when your computer is behind a firewall, try to configure git to use the appropriate proxy server

Python

Q: CMake shows an error when I try to build with Python bindings

The following message appears:

Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE)

Please check the following:

• Make sure Python is installed
• On Windows: If you've just installed python, reboot (or log off) and try again
  • Try the answers suggested here: building-opencv-libraries-from-source-files

Python config failure: Python is 32-bit, chosen compiler is 64-bit

If this message appears you should install python 64 bit

Calibration

Dynamic Calibration Software Tools for D400 series

please check Intel® RealSense™ D400 Series Dynamic Calibration Software Tools