gzclient --verbose
Gazebo multi-robot simulator, version 7.9.0
Copyright (C) 2012 Open Source Robotics Foundation.
Released under the Apache 2 License.
http://gazebosim.org

[Msg] Waiting for master.
[Msg] Connected to gazebo master @ http://127.0.0.1:11345
[Msg] Publicized address: 172.17.0.2
libGL error: failed to open drm device: No such file or directory
libGL error: failed to load driver: nouveau