Virtual Device Serial0 Will Start Disconnected |link| Jun 2026

: The warning can also occur if the VM is configured to connect directly to a physical COM port on the host computer (e.g., COM1) that doesn't exist or is in use by another program. VMware will report that it cannot open the port and subsequently disconnect the virtual device.

Some VM templates or quick-creation wizards add a serial port by default but leave it disconnected. This is common in Linux VM templates that include a legacy console serial port that may not be needed. virtual device serial0 will start disconnected

If you have manually edited the .vmx file to add a serial port but haven't correctly defined the pipe or file it should connect to, the device will remain disconnected. How to Fix It 1. Disable the Serial Port (If Not Needed) : The warning can also occur if the