Starting a VM or performing snapshot-related functions fails with "At most one USB controller expected for VM"

Solution Verified - Updated -

Issue

  • Disks are locked when previewing VM Snapshot.

  • VM fails to start.

  • Engine logs contain;

    • an IllegalStateException indicating At most one USB controller expected for VM
    • the exception is in updateNormalUsb

Environment

  • Red Hat Virtualization (RHV) 4.0.7, 4.1.1

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.