Virtual Device Serial0 Will Start Disconnected __link__ Jun 2026

If you add a serial port to a VM but do not specify what it connects to (e.g., a physical COM port, a file, a named pipe, or an output to a printer), VMware will default to disconnecting it. The device is present but inactive.

Virtual Device Serial0 Will Start Disconnected - Google Groups

A virtual machine (VM) is software that mimics physical hardware. Just like an old desktop computer, a VM can include virtualized legacy ports, including parallel (LPT) and serial (COM) ports.

If the device isn't visible in the GUI or the message persists, you can manually remove the offending lines from your VM's configuration file: Open your VM's folder and locate the .vmx file. Open it with a text editor (like Notepad or TextEdit). Find and delete the following lines: serial0.fileType = "thinprint" serial0.fileName = "thinprint" serial0.present = "TRUE" Save and close the file, then restart your VM. Troubleshooting Physical Port Conflicts virtual device serial0 will start disconnected

Locate the virtual machine, right-click it, and select . Look through the hardware list for Serial port 1 .

This warning should not be mistaken for a critical system error, as it is often generated by harmless or obsolete configuration settings. Understanding this distinction is the first step toward effective remediation.

vim-cmd vmsvc/getallvms | grep -i "Your_VM_Name" vim-cmd vmsvc/reload [VM_ID] Use code with caution. Method 3: Fixing Valid Serial Connections If you add a serial port to a

Full log example:

Save the file and reload the VM configuration in your hypervisor. Preventative Practices for Virtual Infrastructure

: Newer versions of VMware no longer support the "ThinPrint" technology, which often used to handle virtual printing. Legacy Settings Just like an old desktop computer, a VM

Change the connection type to "Output to file" to save serial data to a .txt or .log file.

Do you use any or debugging tools with this specific VM?

typically occurs in VMware Fusion or Workstation after an update (specifically VMware Fusion 13.5 Workstation 17.5 ) because support for virtual printing has been discontinued

The message appears for several legitimate and common reasons:

If you need the serial port, ensure it is mapped to a valid output. the VM. Go to Settings > Serial Port . Change the connection type to a valid setting: