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Mouse, Keyboard and other USB devices keep connecting and disconnecting

APPLIES TO:
  • Parallels Desktop 9 for Mac

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
    

Search words:

Hi there, Having recently patched my Parallels installation to build 23062, my Windows 7 virtual machine has stopped recognising my iPhone. Windows will 'chime' to denote it has I've tried using your support article 111725, however this has not worked. Hardware: Apple Macbook Air (2013, i7, 8GB RAM, 512 GB SSD) Device: Apple iPhone 5 I've tried another device (an external hard drive) and appear to be having the exact same issue. Thanks.

PD




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