Virtual Device Serial0 Will Start Disconnected Official

The fluorescent lights of the server room hummed a low, mocking C-sharp as Elias stared at the monitor. It was 3:04 AM. On the screen, a small, persistent dialogue box glowed like a digital taunt: “Virtual device ‘serial0’ will start disconnected.”

: If your VM was created in an older version, it still has "Printer" enabled in its settings, but the hypervisor no longer knows how to connect it. How to fix it Option 1: The Easy Way (Settings Menu) Power off the virtual machine. Virtual Machine Settings (or right-click the VM > Settings). Select the device from the hardware list. virtual device serial0 will start disconnected

The virtual machine flickered to life. Lines of code scrolled upward—white on black, a waterfall of data—but as the OS reached its final handshake, the screen went dark. No login prompt. No desktop. Just a blinking underscore in the top-left corner, pulsing like a failing heart. The fluorescent lights of the server room hummed

Here is a comprehensive guide on why this happens and how to resolve it. You are using a serial console to manage

• You are using a serial console to manage a headless Linux system.
• You are performing kernel debugging over a serial cable (typical in driver development).
• Your application (e.g., an industrial control system, legacy hardware simulator, or a VM acting as a serial device server) expects an active COM port at boot.
• You are connecting two VMs via a named pipe for IPC.

If you want the port active but connected to nothing (to suppress the warning), you must trick VMware into thinking it has a valid backing: