Virtual Device Serial0 Will Start Disconnected

For the vast majority of virtualized workloads, it is harmless informational output. But if serial communication is critical to your guest OS or application, the warning serves as a useful reminder to attach your virtual cable before booting.

The warning is completely harmless.

: In VMware Workstation 17.5+ and Fusion 13.5+, virtual printer support (which often utilizes serial0 ) was removed. 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 | For the vast majority of virtualized workloads, it