: For users of VMware Fusion or advanced users, manually editing the VM configuration ( ) file to remove entries like serial0.fileType = "thinprint" can permanently resolve the error. Advanced vCenter Configuration
This error is common in VMware Workstation, Player, and ESXi environments. It usually indicates that the virtual machine is configured to use a serial port, but that port cannot connect to the intended backend (such as a physical port on the host, a named pipe, or a file) at the time of booting.
This tells Dynamips to create a direct serial cable between the two virtual devices on boot. virtual device serial0 will start disconnected
However, if you are attempting to boot a specialized operating system that requires a console output on the serial port, it may hang at boot. In that case, you must ensure the port is properly connected to a file or a named pipe.
The message "Virtual device serial0 will start disconnected" is the emulator's honest way of telling you, "I have no information about what this port should connect to, so I am leaving it in a safe, disconnected state." : For users of VMware Fusion or advanced
If your environment requires an active virtual serial port (for instance, to route traffic to a physical serial device over an IP network, or to output to a pipe), you must correct the backing path rather than deleting the device.
The virtual machine’s .vmx file has a faulty entry. 3. Solutions to "Serial0 Will Start Disconnected" This tells Dynamips to create a direct serial
If you are just running a standard OS (Windows, Linux, macOS) and are not debugging kernel panics, you likely do not need this device. Removing it will clean up your logs and slightly improve boot speed.
If the "Printer" device doesn't show up in your settings or you are using VMware Fusion, you can manually edit the configuration file: Close VMware and find your VM's .vmx file on your computer.
After this, show ip interface brief still shows Serial0 down/down .