Knowledge BaseTroubleshootingWhat can I do if pressing Ctrl+Alt+Del causes a host to disconnect?

What can I do if pressing Ctrl+Alt+Del causes a host to disconnect?

TroubleshootingZCF · CloudVersions3.x-5.5.30Article IDKB-100314Updated2026-08-19

Issue/Introduction

This article provides initial diagnosis and handling guidance for a host disconnection caused by pressing Ctrl+Alt+Del in ZStack Cloud.

Environment

  • Product: ZCF
  • Component: Cloud
  • Versions: 3.x-5.5.30

Symptoms

The host is disconnected, and the messages log shows that a virtual USB device was connected and Received SIGINT was received.

Possible causes

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What can I do if pressing Ctrl+Alt+Del causes a host to disconnect? | KB-100314 | ZStack Resource Center