| Goal | Action | | :--- | :--- | | Fix Warning | Remove the Serial Port device in VM Settings. | | Keep Functionality | Ensure the output file path/pipe name is correct and the destination exists. | | GNS3 Users | Start the GNS3 topology before starting the VM. |
This message typically appears in virtual machine platforms (like VMware, VirtualBox, or QEMU) or network simulation tools (like GNS3 or EVE-NG). virtual device serial0 will start disconnected
| Aspect | Effect | |--------|--------| | Boot time | Slightly faster (no connection setup) | | Error logs | No “failed to connect” errors at boot | | Serial console access | Requires manual connection | | Compatibility | Guest OS may need to handle carrier-detect wait | | Goal | Action | | :--- |
If you need serial0 active at boot: