Virtual Device Serial0 Will Start Disconnected Page
When a virtual machine starts with the warning it typically means the VM is trying to initialize a serial port that is either misconfigured, pointing to a non-existent physical resource, or linked to a legacy feature that is no longer supported. Core Causes of the Warning
Virtual machines use virtual hardware definitions to mirror physical computer components. When a VM is configured with a virtual serial port (COM port), VMware attempts to map that virtual port to a resource on your physical host machine during the boot sequence.
Most modern virtual machines (Windows 10/11, Linux servers, Ubuntu) do not require a physical serial port. Removing it is the best way to get rid of the warning. your virtual machine. Open the VM settings in VMware Workstation/Player. Select Serial Port 1 (or Serial0 ). Click Remove . Click OK and start the virtual machine. Solution 2: Disable "Connect at Power On"
Open the .vmx file using a plain text editor (like Notepad or Vi). Locate the lines beginning with serial0 . Change the connection status string to false: serial0.present = "TRUE" serial0.startConnected = "FALSE" Use code with caution.
Make sure:
) to handle "Virtual Printing" (ThinPrint). Following the removal of this feature in late 2023 updates, legacy virtual machine configurations still contain entries for it, leading to an invalid parameter error: serial0.fileType = "thinprint" How to Resolve the Issue Method 1: Using the GUI (Recommended for Workstation) Power off the virtual machine. VM Settings Select the and save your changes. : In VMware Workstation, go to Preferences and uncheck "Enable virtual printers" to prevent it globally. Broadcom support portal
For typical modern operating systems like Windows 11, Windows Server 2022, or standard Linux distributions (Ubuntu, Red Hat), a serial port is completely vestigial. The operating system will boot normally, ignoring the disconnected hardware.
THE PORT IS NOT DISCONNECTED, the terminal scrolled. YOU WERE SIMPLY ON THE WRONG SIDE OF THE WIRE.
If using a USB-to-Serial adapter, ensure the drivers are installed on the host and the correct COM port number is selected in the VM settings. 3. Edit the .VMX File virtual device serial0 will start disconnected
environments when the software attempts to initialize a virtual serial port (often used for "Virtual Printing" or "ThinPrint") that is either misconfigured or disabled globally Recommended Solutions
What (Windows, Linux, etc.) are you running?
Right-click the VM in your library and select (or go to VM > Settings ).
The "virtual device serial0" error is rarely a "broken" VM; it’s just a mismatch between virtual hardware and physical reality. By removing the port or disabling the "Connect at power on" toggle, you can return to a seamless, one-click boot process. When a virtual machine starts with the warning
Click to save. Note: The device remains in your virtual hardware list, but VMware will no longer attempt to initialize it when the system boots. Method 3: Reconfigure the Connection Target
Locate the virtual machine, right-click it, and select . Look through the hardware list for Serial port 1 .
If you are currently setting up a specialized environment, let me know:
Elias felt a chill that had nothing to do with the server room's air conditioning. He reached for the mouse to kill the process, but the cursor stayed pinned to the center of the screen. Most modern virtual machines (Windows 10/11, Linux servers,