title: No active virtual can messages when using candump (SocketCAN)
body: <p>I am playing with can-utils package, trying to run a virtual can device.  Everything seems to work fine except there is no active messages. Candump and cansniffer works, because I send a message manually and it shows up.</p>
  
  <p>Am I doing something wrong?</p>
  
  <p>Here are the commands I run:</p>
  
  <pre><code>sudo modprobe vcan
  sudo ip link add dev vcan0 type vcan
  sudo ip link set up vcan0
  candump vcan0
  </code></pre>
  
  <p>I am using Ubuntu 16, Kernel 4.11.0</p>