Completely the virtual machine (do not just suspend it).
If the GUI settings do not stick, or if you are managing a "Headless" VM (no graphical interface), you must edit the configuration file directly.
<!-- Libvirt example --> <serial type='pty'> <source path='/dev/pts/foo'/> <target port='0'/> <connect start='connected'/> </serial>
Method 1: Remove the Device (Recommended for ThinPrint Issues) virtual device serial0 will start disconnected
If you do not need a serial port, either remove the device from the VM hardware configuration or set serial0.present = "FALSE" in the .vmx file. This eliminates unnecessary warnings and reduces complexity.
host, and do you actually need to print from within your virtual machine?
If you are unable to get a serial link operational, follow these steps: Completely the virtual machine (do not just suspend it)
The warning "Virtual device serial0 will start disconnected" is a common message that appears when starting a virtual machine in VMware products like Workstation, Fusion, and ESXi. While alarming at first glance, this message is typically harmless, but understanding its origins and implications is essential for efficient management of virtualized systems.
If you want to keep the device but stop the warning, you can tell VMware not to attempt a connection during boot.
Related search suggestions I can run for more detail: "virtual device serial0 will start disconnected libvirt", "serial0 will start disconnected QEMU", "enable serial console libvirt getty ttyS0". This eliminates unnecessary warnings and reduces complexity
: This typically refers to a CD/DVD drive looking for an ISO file that has been moved or a physical drive that is empty.
Change the connection type to "Output to file" to save serial data to a .txt or .log file.
| Platform | Typical Reason | | :--- | :--- | | | The serial port is set to "Use named pipe" or "Use output file", but the other end (e.g., a debugger like WinDbg) hasn't connected yet. | | VirtualBox | Serial port is enabled with "Port Mode" set to "Disconnected". | | GNS3 / EVE-NG | The virtual router or switch has a serial interface (e.g., serial0/0 ), but it's not linked to another device's serial interface via a cable. | | QEMU | The -serial option is used without a backend (e.g., -serial null or -serial unix:/path,server=off ). |
(a virtual printing technology), but many older VMs still have "Printer" devices in their settings that rely on Missing Physical Hardware: