I am running Ubuntu 13.04 and graphic card Intel Intel® Ivybridge Mobile.

I get his error maybe every 4th time I try to start gazebo from a launch file. Any ideas what is causing this?

    Msg Publicized address: 192.168.1.80
    X Error of failed request:  BadDrawable (invalid Pixmap or Window parameter)
      Major opcode of failed request:  152 (DRI2)
      Minor opcode of failed request:  3 (DRI2CreateDrawable)
      Resource id in failed request:  0x4600002
      Serial number of failed request:  29
      Current serial number in output stream:  31
    gzclient: /usr/include/boost/smart_ptr/shared_ptr.hpp:424: T* boost::shared_ptr<T>::operator->() const [with T = gazebo::transport::Connection]: Assertion `px != 0' failed.
    Aborted (core dumped)
    [gazebo_gui-3] process has died [pid 12443, exit code 134, cmd 

/opt/ros/hydro/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/viki/.ros/log/c8e154ac-39e5-11e3-8483-28cfe95d78b1/gazebo_gui-3.log].
log file: /home/viki/.ros/log/c8e154ac-39e5-11e3-8483-28cfe95d78b1/gazebo_gui-3*.log
[ INFO] [1382314485.830654788]: Loading gazebo_ros_control plugin
[ INFO] [1382314485.830824307]: Starting gazebo_ros_control plugin in namespace: /rrbot
[ INFO] [1382314485.831740908]: gazebo_ros_control plugin is waiting for model URDF in parameter [robot_description] on the ROS param server.