Virtual Device Serial0 Will Start Disconnected Hot!

If you are seeing this message during a high-speed production boot, it may slow down the startup process slightly. However, for most users, simply disabling the virtual printer feature (Solution 1) will resolve the issue.

If you have ever worked with Cisco routers, you might have encountered the cryptic message, "virtual device serial0 will start disconnected" upon booting up your device, especially in lab environments. This message is not an error indicating a critical failure, but rather an informational status report that can provide valuable insights into your device's operational state. This article provides a comprehensive guide to understanding this message, exploring its context, causes, and implications, along with practical troubleshooting tips.

If you are running a standard consumer operating system (like Windows 10/11 or a desktop Linux distribution), you do not need a serial port. Removing it entirely will stop the error and free up minor system resources. the virtual machine completely. virtual device serial0 will start disconnected

Which and version are you using (VMware Workstation, ESXi, Fusion)?

Most modern occurrences are caused by a recent VMware update (Workstation 17.5+ or Fusion 13.5+). VMware discontinued support for If you are seeing this message during a

Verify that the pipe name matches your debugging client configuration exactly and that firewall rules permit the connection. Check the Connect at power on box. Click Save and test the VM boot sequence. Method 3: Modify the VMX Configuration File Manually

When building new virtual machines using the custom wizard, you can prevent this issue entirely by auditing the hardware list before finalizing the build. Simply remove default legacy devices—such as serial ports, parallel ports, and floppy drives—if your guest operating system does not strictly require them. This message is not an error indicating a

Here are the step-by-step methods to resolve this issue in VMware Workstation/Player and vSphere. Method A: Disabling the Serial Port (If not needed)

If you fit these criteria, change the Serial Port connection type in VMware Settings from "Physical Serial Port" to or "Use named pipe" to route the data correctly without triggering the hardware disconnection error.

For advanced administrators managing standalone ESXi hosts or Workstation environments, editing the virtual machine configuration ( .vmx ) file offers a direct remedy.

Does your virtual machine have or a TPM enabled? These can sometimes complicate the manual editing process.