Virtual Device Serial0 Will Start Disconnected Patched -

If you are a developer or network engineer using the serial port for OS debugging, kernel logging, or GNS3/VMware communication, you need to fix the connection path.

The VM is set to connect to a named pipe or a physical port that is disconnected. How to Fix the "Serial0" Warning virtual device serial0 will start disconnected

If you select "Physical serial port" but leave the "Connect at power on" box , you will see this message. If you are a developer or network engineer

You should fix this if:

You cloned a VM from an older template that included serial hardware by default. How to Fix "Serial0 Will Start Disconnected" or GNS3/VMware communication