Dell Command | Integration Suite for System Center Version 5.0 User’s Guide

KVM Power Control to Boot to OS in S3

If after a KVM connection is established, the AMT client enters power state S3 or S4, the KVM connection is lost within 30 seconds of entering the sleep state. (This issue occurs in both wired and wireless environments.) In such a case, the administrator needs to restart the connection (Connection→ Start), before issuing a reboot command (OS, BIOS, Diagnostics, IDE-R).