This can vary but normally within 5 secs. I'll try to make a video to to show you. Although the terminal seems to continue without error so I'm a little stumped or unable to offer better information.
The only other thing I can think of being a problem is that I'm now using ubuntu 20. and ros noetic having installed the k4a 1.4 manually as per the last comment on
https://github.com/microsoft/Azure-Kinect-Sensor-SDK/issues/1263