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Mouse, Keyboard and other USB devices keep connecting and disconnecting

APPLIES TO:
  • Parallels Desktop 9 for Mac Standard Edition

Symptoms

Mouse and Keyboard keep connecting and disconnecting in a Windows Virtual Machine in Parallels Desktop 9. This action is followed by respective sound of a device connected to Windows.

Solution

Please update Parallels Desktop 9 for Mac by clicking on Parallels Desktop menu -> Check for Updates... and install the update.


Note: if you previously used this article to workaround the USB issue:

  1. Go to Virtual Machine menu ► Configure... ► Hardware► Boot Order
  2. Remove this Boot Flag from Boot Flags field:

    devices.usb.ehc=0
    




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