Virtual Device Serial0 Will Start Disconnected ((top)) [POPULAR]
serial0.present = "TRUE" serial0.fileType = "device" serial0.fileName = "COM1" serial0.startConnected = "TRUE" Use code with caution.
Once the most likely cause has been identified, you can follow these targeted solutions.
Right-click the VM in your VMware library and select . Go to the Hardware tab. virtual device serial0 will start disconnected
Depending on whether you actually need to use a serial port within your virtual guest OS, choose one of the following solutions.
: The warning can also occur if the VM is configured to connect directly to a physical COM port on the host computer (e.g., COM1) that doesn't exist or is in use by another program. VMware will report that it cannot open the port and subsequently disconnect the virtual device. serial0
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.
If you want to keep the device for occasional use but stop the error message at startup: Go to . Select the Serial Port hardware. Uncheck the box for "Connect at power on" . Go to the Hardware tab
If you want to disable the feature globally to prevent this on other VMs: Go to > Preferences . Navigate to the Devices tab. Uncheck the box for "Enable virtual printers" . Option 3: Manual Edit (Advanced)
Virtual Device Serial0 Will Start Disconnected - Google Groups
Network‑backed serial ports require careful firewall management, especially in ESXi. Before connecting a network‑backed serial port, add the proper firewall rule sets to prevent the ESXi firewall from blocking the connection: use VM serial port connected to vSPC when using the Virtual Serial Port Concentrator, or VM serial port connected over network for direct TCP connections. The default vSPC port is 9977, and outgoing TCP ports should range from 1024 upward.
