Parallels WorkStation 2.2, 250-499u, EDU, ESD, IT WWL2XL-A06-IT Manual Do Utilizador

If the USB controller is enabled in the virtual machine configuration, you can 
connect/disconnect USB peripherals to the running virtual machine. Up to two USB devices can 
be used by virtual machine simultaneously.  

Parallels Workstation automatically detects all the USB devices connected to your host 
computer and displays them under the Devices->USB menu item and in the context menu for the 
USB controller (

) in the status bar. Those devices that are currently connected to the virtual 

machine are checked. The primary OS can not access a USB device while it is being used by the 
virtual machine. 

Note: If the guest OS is started with the USB controller disabled, you should shut down the 
guest OS first, then enable the USB controller in the Configuration Editor (select the Enabled 
check box in the USB Options (page 127) tab) and restart the guest OS. 

If the Autoconnect USB devices option in the USB Options (page 127) tab is turned on and no 
more than one USB device is currently active, you can connect an additional USB device to 
your virtual machine. Do the following: 

ƒ  simply connect a USB device to your host computer.  

If you connect an additional USB peripheral to your host computer while there are two active 
USB devices already running, nothing will happen. However you are able to activate the newly 
connected device manually after deactivating any of the currently active USB devices. See the 
next subtopic to learn more on this. 

To connect a USB device to the virtual machine: 

ƒ  Connect a USB device to your host computer. 
ƒ  Select  Devices->USB in the Parallels Workstation menu or context menu for the USB 

controller  (

) in the status bar to display the list of all the USB devices connected to your 

host computer. 

In the USB device list, make sure that no more than one USB device is currently active. If there 
are two devices checked, disconnect one of them by clicking it. 

ƒ  Click the desired USB device in the list to connect it. 

Note. If you follow the instructions stated above but receive the "Unable to connect 
USB device

" message while trying to connect an USB device on a computer running Linux 

primary OS, see the Problem with Connecting USB Devices in Linux Primary OS (page 209).