Hii!, I have a problem. When I try to run $roslaunch gazebo_worlds empty_world.launch, i get this message:

... logging to /home/mystery/.ros/log/29ff36fe-9493-11e1-9c3e-00262d845d75/roslaunch-mystery-Aspire-5740-1281.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://mystery-Aspire-5740:50215/

SUMMARY

PARAMETERS * /rosversion * /use_sim_time * /rosdistro

NODES / gazebo (gazebo/gazebo)

auto-starting new master process[master]: started with pid [1303] ROS_MASTER_URI=http://localhost:11311

setting /run_id to 29ff36fe-9493-11e1-9c3e-00262d845d75 process[rosout-1]: started with pid [1316] started core service [/rosout] process[gazebo-2]: started with pid [1319] Gazebo multi-robot simulator, version 0.10.0

Part of the Player/Stage Project [http://playerstage.sourceforge.net]. Copyright (C) 2003 Nate Koenig, Andrew Howard, and contributors. Released under the GNU General Public License.

gazebo: /home/mystery/Descargas/ogre_src_v1-7-4/OgreMain/include/OgreSingleton.h:80: Ogre::Singleton<t>::Singleton() [with T = Ogre::TerrainPageSourceListenerManager]: Assertion `!ms_Singleton' failed. [gazebo-2] process has died [pid 1319, exit code -6]. log files: /home/mystery/.ros/log/29ff36fe-9493-11e1-9c3e-00262d845d75/gazebo-2*.log

and try to run too $roslaunch turtlebot_gazebo turtlebot_empty_world.launch :

... logging to /home/mystery/.ros/log/79b5f7dc-9493-11e1-969d-00262d845d75/roslaunch-mystery-Aspire-5740-1354.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://mystery-Aspire-5740:50489/

SUMMARY

PARAMETERS * /use_sim_time * /robot_pose_ekf/sensor_timeout * /diagnostic_aggregator/analyzers/sensors/path * /robot_pose_ekf/imu_used * /robot_pose_ekf/odom_used * /robot_pose_ekf/vo_used * /diagnostic_aggregator/analyzers/nodes/timeout * /diagnostic_aggregator/analyzers/mode/timeout * /pointcloud_throttle/max_rate * /diagnostic_aggregator/analyzers/sensors/timeout * /diagnostic_aggregator/analyzers/power/type * /diagnostic_aggregator/analyzers/power/timeout * /diagnostic_aggregator/analyzers/mode/type * /kinect_laser/min_height * /diagnostic_aggregator/analyzers/digital_io/path * /kinect_laser_narrow/max_height * /diagnostic_aggregator/analyzers/digital_io/timeout * /kinect_laser/max_height * /diagnostic_aggregator/analyzers/nodes/path * /rosdistro * /robot_description * /kinect_laser_narrow/output_frame_id * /diagnostic_aggregator/base_path * /robot_pose_ekf/freq * /diagnostic_aggregator/analyzers/sensors/type * /diagnostic_aggregator/analyzers/digital_io/startswith * /diagnostic_aggregator/analyzers/power/path * /diagnostic_aggregator/analyzers/mode/path * /robot_state_publisher/publish_frequency * /diagnostic_aggregator/analyzers/mode/startswith * /rosversion * /diagnostic_aggregator/pub_rate * /diagnostic_aggregator/analyzers/digital_io/type * /diagnostic_aggregator/analyzers/sensors/startswith * /diagnostic_aggregator/analyzers/power/startswith * /kinect_laser_narrow/min_height * /kinect_laser/output_frame_id * /robot_pose_ekf/publish_tf * /diagnostic_aggregator/analyzers/nodes/type * /diagnostic_aggregator/analyzers/nodes/contains

NODES / gazebo (gazebo/gazebo) spawn_turtlebot_model (gazebo/spawn_model) diagnostic_aggregator (diagnostic_aggregator/aggregator_node) robot_state_publisher (robot_state_publisher/state_publisher) robot_pose_ekf (robot_pose_ekf/robot_pose_ekf) pointcloud_throttle (nodelet/nodelet) kinect_laser (nodelet/nodelet) kinect_laser_narrow (nodelet/nodelet)

auto-starting new master process[master]: started with pid [1444] ROS_MASTER_URI=http://localhost:11311

setting /run_id to 79b5f7dc-9493-11e1-969d-00262d845d75 process[rosout-1]: started with pid [1458] started core service [/rosout] process[gazebo-2]: started with pid [1472] process[spawn_turtlebot_model-3]: started with pid [1473] process[diagnostic_aggregator-4]: started with pid [1474] process[robot_state_publisher-5]: started with pid [1475] process[robot_pose_ekf-6]: started with pid [1476] process[pointcloud_throttle-7]: started with pid [1482] process[kinect_laser-8]: started with pid [1488] process[kinect_laser_narrow-9]: started with pid [1501] Gazebo multi-robot simulator, version 0.10.0

Part of the Player/Stage Project [http://playerstage.sourceforge.net]. Copyright (C) 2003 Nate Koenig, Andrew Howard, and contributors. Released under the GNU General Public License.

gazebo: /home/mystery/Descargas/ogre_src_v1-7-4/OgreMain/include/OgreSingleton.h:80: Ogre::Singleton<t>::Singleton() [with T = Ogre::TerrainPageSourceListenerManager]: Assertion `!ms_Singleton' failed. [gazebo-2] process has died [pid 1472, exit code -6]. log files ... (more)