Are you managing a or looking to automate a fix across multiple hosts ?
Ninety-nine percent of standard desktop users do not need a serial port in their virtual machine. Modern operating systems handle communication via USB and network protocols. Removing the unneeded hardware stops the error completely. For VMware Workstation / Player (Windows/Linux):
Open the [VM_Name].vmx file using a text editor like vi or Notepad++.
Now go build your topology, connect those serial cables, and watch show interface serial0 finally display the glorious words:
Running legacy industrial automation, point-of-sale (POS) systems, or specialized medical software that expects data from a COM port. virtual device serial0 will start disconnected
serial0.present = "TRUE" serial0.startConnected = "TRUE" serial0.fileType = "file" serial0.fileName = "/vmfs/volumes/datastore1/vm_folder/serial.log" Use code with caution.
), but another application is already using it, or the host does not actually have a COM1cap C cap O cap M 1
The "virtual device serial0 will start disconnected" message is a benign configuration alert indicating a hardware mismatch between your virtual machine settings and your physical host machine.
Search for lines beginning with serial0 . You will typically see lines resembling the following: Are you managing a or looking to automate
Right-click the VM in your library and select (or go to VM > Settings ).
The warning typically appears in VMware environments when a virtual machine (VM) is configured to include a serial port that the host system cannot currently find or access . This is common in newer versions of VMware software where certain legacy features, such as ThinPrint , have been discontinued. Common Causes
If the virtual serial port is required for your workflow, you must fix its underlying connection path. Navigate to the menu of the powered-off VM.
A: In VMware Workstation, you cannot suppress warnings globally. The only way is to connect the port to a valid target (file or pipe) or remove it. Removing the unneeded hardware stops the error completely
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.
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To help narrow down the cause of this error, could you tell me:
If you need serial0 to start , override the default by specifying: