roslaunch pr2_gazebo pr2_empty_world.launch

edit

Hi,

I've problems to launch pr2_empty_world.launch.This is a snippet of my error warnings:

[INFO] [1529084062.494837, 0.000000]: Calling service /gazebo/spawn_urdf_model
Warning [parser_urdf.cc:1232] multiple inconsistent <gravity> exists due to fixed joint reduction overwriting previous value [true] with [false].
Warning [parser_urdf.cc:1232] multiple inconsistent <gravity> exists due to fixed joint reduction overwriting previous value [false] with [true].
[ WARN] [1529084063.932088202]: The input topic '/narrow_stereo/left/image_raw' is not yet advertised
[ WARN] [1529084063.932702196]: The input topic '/narrow_stereo/left/camera_info' is not yet advertised
[ WARN] [1529084063.932991245]: The input topic '/narrow_stereo/right/image_raw' is not yet advertised
[ WARN] [1529084063.933277749]: The input topic '/narrow_stereo/right/camera_info' is not yet advertised
[ WARN] [1529084063.942112226]: The input topic '/wide_stereo/left/image_raw' is not yet advertised
[ WARN] [1529084063.948461232]: The input topic '/wide_stereo/left/camera_info' is not yet advertised
[ WARN] [1529084063.948770323]: The input topic '/wide_stereo/right/image_raw' is not yet advertised
[ WARN] [1529084063.949038749]: The input topic '/wide_stereo/right/camera_info' is not yet advertised
[ WARN] [1529084063.971039008]: The input topic '/narrow_stereo/left/image_raw' is not yet advertised
[ WARN] [1529084063.971271917]: The input topic '/narrow_stereo/left/camera_info' is not yet advertised
[ WARN] [1529084063.971305390]: The input topic '/narrow_stereo/right/image_raw' is not yet advertised
[ WARN] [1529084063.971337695]: The input topic '/narrow_stereo/right/camera_info' is not yet advertised
TIFFFetchNormalTag: Warning, Incompatible type for "RichTIFFIPTC"; tag ignored.

It seems to do something with the spawn_urdf_model and the following not recognized topics. Afterwards there comes Internal error messages... There's also this warning:

[ WARN] [1529084065.108074492]: The <focal_length>[320.000105] you have provided for camera_
[l_forearm_cam_sensor] is inconsistent with specified image_width [640] and HFOV [1.570800].   Please double check to see that focal_length = width_ / (2.0 * tan(HFOV/2.0)), the explected focal_lengtth value is [319.998825], please update your camera_ model description accordingly.

And a bit later:

Aborted (core dumped)
[WARN] [1529084065.931932, 0.000000]: Spawner couldn't reach pr2_controller_manager to take down controllers.
[gazebo-2] process has died [pid 7668, exit code 134, cmd /home/kathrinblank/catkin_ws/src/gazebo_ros_pkgs/gazebo_ros/scripts/gzserver -u -e ode worlds/empty.world __name:=gazebo __log:=/home/kathrinblank/.ros/log/5273cc5a-70c2-11e8-845a-c85b76b6af9c/gazebo-2.log].
log file: /home/kathrinblank/.ros/log/5273cc5a-70c2-11e8-845a-c85b76b6af9c/gazebo-2.

Have someone an idea what it might be? I'm using ROS kinetic on ubuntu 16.04. I have the intel hd graphics 520 onboard graphic card... Thanks in advance.