Virtual Device Serial0 Will Start Disconnected < FULL CHEAT SHEET >

In VMware Workstation (versions 17.5+) and VMware Fusion (versions 13.5+), native architecture support for the ThinPrint virtual printing feature was completely removed. Virtual machines created in older releases still retain these printer links, which are structurally mapped directly through serial0 . The hypervisor flags an invalid parameter because the backing module no longer exists.

The “Virtual device serial0 will start disconnected” message is a common informational warning that appears in various VMware products. It is not an indication of VM corruption or permanent failure, but rather a notification that the VM’s virtual COM port was unable to establish a connection during startup.

: If the serial port is configured to connect to a physical host port, a named pipe, or a specific file that is currently unavailable or inaccessible, the VM will power on with the device disconnected to prevent a full boot failure. Resolution Strategies Disable Virtual Printing : The most common fix is to navigate to Edit > Preferences > Devices in VMware Workstation and uncheck "Enable virtual printers" Modify VM Settings : Right-click the affected VM, go to , select the Serial Port device, and uncheck "Connect at power on"

. Unless your workflow specifically requires a serial console or virtual printing, you can typically dismiss the message and the VM will function normally. for editing the file on your specific operating system? Virtualization Architect Technical Support Engineer virtual device serial0 will start disconnected

The warning message is a frequent issue encountered by users of virtualization platforms like VMware Workstation Pro , VMware Fusion, and vSphere. This alert notifies you that a virtual serial port ( serial0 ) is assigned to the virtual machine (VM) but cannot hook up to a valid backend device on the host system upon bootup.

This guide explains why this warning happens, what it means for your system, and how to resolve it permanently. Understanding the Warning

If you are unable to get a serial link operational, follow these steps: In VMware Workstation (versions 17

Ensure the serial0.fileType matches your intent (e.g., "device" , "pipe" , or "file" ). USB Serial Port kinda working | Fusion - Broadcom Community

If you need the port, but not on boot: .

Alternatively, click the or Remove button next to the serial port to delete the virtual device permanently. Click Save and power on the VM. Method 2: Correct the Backing Configuration Resolution Strategies Disable Virtual Printing : The most

The hypervisor cannot establish the link defined for that port when the VM starts.

Depending on your specific VMware product, use the following steps to resolve or suppress the warning: For VMware Workstation Users: Disable Virtual Printing Globally: This is the most common fix. Go to Preferences and uncheck the box for "Enable virtual printers" Modify Individual VM Settings: