Docker: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'

# Issue GUI cannot be started when I run RVIZ and other GUI programs ```sh root@yubao-desktop:~/catkin_ws/src# rosrun rviz rviz QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root' [ INFO] [1592546827.600791426]: rviz version 1.13.12 [ INFO] [1592546827.600826376]: compiled against Qt version 5.9.5 [ INFO] [1592546827.600831631]: compiled against OGRE version 1.9.0 (Ghadamon) [ INFO] [1592546827.605823998]: Forcing OpenGl version 0. dbus[285]: The last reference on a connection was dropped without closing the connection. This is a bug in an application. See dbus_connection_unref() documentation for details. Most likely, the application was supposed to call dbus_connection_close(), since this is a private connection. D-Bus not built with -rdynamic so unable to print a backtrace Aborted (core dumped) ``` # Solution Add this to docker-compose.yaml ```sh privileged: true ``` # Full example - Docker compose ```sh version: '2.3' services: ubuntu18_cuda10.2_ros: image: yubaoliu/root:ros-cuda10.2-cudnn7-ubuntu18.04 build: context: . dockerfile: Dockerfile args: cuda_version: 10.2 nvidia_cudnn_version: # cudnn_version: 7 ubuntu_version: 18.04 runtime: nvidia command: - roscore stdin_open: true privileged: true tty: true network_mode: "host" environment: - DISPLAY - QT_X11_NO_MITSHM=1 volumes: - /tmp/.X11-unix:/tmp/.X11-unix:rw ``` - Start docker ```sh docker-compose -f cuda10.2.yaml up --force-recreate --remove-orphans ``` - Start docker terminal ```sh docker-compose -f cuda10.2.yaml exec ubuntu18_cuda10.2_ros bash ``` - Start RVIZ

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