(参考)[https://answers.gazebosim.org//question/27049/can-you-render-a-camera-in-headless-mode/]
现象:realsense相机报错Unable to create X window. Rendering will be disabled
解决方法:用xvfb启动gazebo
sudo apt install xvfb
xvfb-run -a roslaunch simulation_gazebo manager.launch