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After a new Hyper-V VMMS certificate is generated, there are mouse and screen resolution issues when you manage a virtual machine using the Hyper-V Manager Console

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This article provides a solution to mouse and screen resolution issues when managing a virtual machine by using the Hyper-V Manager Console.

Original KB number:   2413735

Symptoms

On Windows Server 2012 R2, you may experience one of the following symptoms when you connect to a Hyper-V virtual machine using the Hyper-V Manager console or the System Center Virtual Machine Manager Administrator Console:

  • The mouse cursor is frozen or has disappeared.
  • The screen resolution has reverted to the default size.

If you connect to the virtual machine using a Remote Desktop Connection (RDP), the symptoms listed above are not exhibited.

Cause

This issue can occur after a new Hyper-V VMMS certificate is generated.

Note

The following event will be logged in the Hyper-VMMS event log when a new VMMS certificate is generated:

Log Name: Microsoft-Windows-Hyper-V-VMMS-Admin
Source: Microsoft-Windows-Hyper-V-VMMS
Event ID: 12520
Level: Warning
Description:
Auto-generating a self-signed certificate for server authentication.

Resolution

To resolve this issue, perform one of the following steps on the Hyper-V server:

  • Place the virtual machines in a saved state and then resume the virtual machines.
  • Restart the virtual machines.

More information

The self-signed certificate that is generated by the Hyper-V Virtual Machine Management service is valid for one year.