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This probably is neither a bug nor a problem with Fuerte vs. Electric. To me it looks like something is wrong with your network configuration. Have a look at this wiki page for diagnosing the problems.

Since the robot cannot receive any data from your laptop, I guess its host name is not known to the robot, i.e. ping <hostname of your laptop> doesn't work on your robot. Try setting the environment ROS_IP on your laptop.

Sending data from the virtual machine is even more tricky. You'll probably have to set up bridging instead of a routing based network. When you can ping the IP of your virtual machine from your robot and you set ROS_IP inside it, then publishing from it should work.

This probably is neither a bug nor a problem with Fuerte vs. Electric. To me it looks like something is wrong with your network configuration. Have a look at this wiki page for diagnosing the problems.this kind of issues.

Since the robot cannot receive any data from your laptop, I guess its host name is not known to the robot, i.e. ping <hostname of your laptop> doesn't work on your robot. Try setting the environment ROS_IP on your laptop.

Sending data from the virtual machine is even more tricky. You'll probably have to set up bridging instead of a routing based network. When you can ping the IP of your virtual machine from your robot and you set ROS_IP inside it, then publishing from it should work.