D435 camera unable to connect after killing launch !

[elpimous]

Hello,
when starting TX2 and testing roslaunch realsense2_camera rs_camera.launch, it works !

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When i kill the node and start it again, SOMETIMES, IT FAILS,
and unable to restart node without restarting TX2 !!!

auto-starting new master
process[master]: started with pid [26020]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to a9b3279e-90e9-11e8-8a3c-00044b8c50d7
process[rosout-1]: started with pid [26035]
started core service [/rosout]
process[camera/realsense2_camera_manager-2]: started with pid [26054]
process[camera/realsense2_camera-3]: started with pid [26055]
[ INFO] [1532619390.555301027]: Initializing nodelet with 6 worker threads.
[ INFO] [1532619390.735162427]: RealSense ROS v2.0.3
[ INFO] [1532619390.735321338]: Running with LibRealSense v2.13.0
[ERROR] [1532619390.752382648]: No RealSense devices were found! Terminating RealSense Node...
[FATAL] [1532619390.958182460]: Failed to load nodelet '/camera/realsense2_camera` of type `realsense2_camera/RealSenseNodeFactory` to manager `realsense2_camera_manager'
[camera/realsense2_camera_manager-2] process has died [pid 26054, exit code 1, cmd /opt/ros/kinetic/lib/nodelet/nodelet manager __name:=realsense2_camera_manager __log:=/home/nvidia/.ros/log/a9b3279e-90e9-11e8-8a3c-00044b8c50d7/camera-realsense2_camera_manager-2.log].
log file: /home/nvidia/.ros/log/a9b3279e-90e9-11e8-8a3c-00044b8c50d7/camera-realsense2_camera_manager-2*.log
[camera/realsense2_camera-3] process has died [pid 26055, exit code 255, cmd /opt/ros/kinetic/lib/nodelet/nodelet load realsense2_camera/RealSenseNodeFactory realsense2_camera_manager __name:=realsense2_camera __log:=/home/nvidia/.ros/log/a9b3279e-90e9-11e8-8a3c-00044b8c50d7/camera-realsense2_camera-3.log].
log file: /home/nvidia/.ros/log/a9b3279e-90e9-11e8-8a3c-00044b8c50d7/camera-realsense2_camera-3*.log
^C[rosout-1] killing on exit
[master] killing on exit
shutting down processing monitor...
... shutting down processing monitor complete