New for USB Drivers

Windows 8 includes the following new USB features:

USB 3.0 support

Windows 8 includes a new driver stack to support USB 3.0 devices. The new stack includes drivers that are loaded by Windows when a USB 3.0 device is attached to an xHCI host controller. The new driver stack implements several new capabilities, such as static streams support. The USB Generic Parent Driver (Usbccgp.sys) implements function suspend and remote feature wake-up features, as per the USB 3.0 specification.

New DDIs for USB client drivers

The Windows Driver Kit (WDK) for Windows 8 provides new device driver interfaces (DDIs) that client drivers can call to use new features and improvements. For more information, see What's New for USB Client Drivers.

UASP driver

Windows 8 includes a new USB storage driver that implements the USB Attached SCSI Protocol (UASP). The new driver uses static streams for bulk endpoints, as per the official USB 3.0 specification.

Boot support

The Windows to Go feature allows Windows to boot from a flash drive or an external drive. You can boot with your copy of Windows from those drives on various machines.

Enhanced debugging and diagnostic capabilities

Windows 8 provides new USB 3.0 debugging tools to improve diagnosing USB issues faster. There are new USB 3.0 kernel debugger extensions that examine USB 3.0 host controller and device states. You can use USB WPP and event tracing to analyze USB interactions and troubleshoot USB device issues more easily. Windows 8 supports debugging over USB 3.0. For more information, see Setting Up a USB 3.0 Connection Manually.

New USB-specific failure messages in Device Manager

At times, Windows can fail to enumerate an attached USB device. Typically, enumeration failures occur when requests sent to the USB device fail or the device returns incorrect descriptors.

In Windows 8, when such failures occur, the General tab in Device Manager displays a USB-specific error message that indicates the reason for failure.

The error strings are as follows:

  • A request for the USB device descriptor failed.
  • The USB set address request failed.
  • A USB port reset request failed.
  • A previous instance of the USB device was not removed.
  • The USB device returned an invalid USB configuration descriptor.
  • The USB device returned an invalid USB device descriptor.
  • Unable to access the registry.
  • A request for the USB configuration descriptor failed.
  • A request for the USB device's port status failed.
  • The USB device returned an invalid serial number string.
  • The USB set SEL request failed.
  • A request for the USB BOS descriptor failed.
  • A request for the USB device qualifier descriptor failed.
  • A request for the USB serial number string descriptor failed.
  • A request for the USB language ID string descriptor failed.
  • A request for the USB product description string descriptor failed.
  • A request for the Microsoft OS extended configuration descriptor failed.
  • A request for the Microsoft OS container ID descriptor failed.
  • The USB device returned an invalid USB BOS descriptor.
  • The USB device returned an invalid USB device qualifier descriptor.
  • The USB device returned an invalid USB language ID string descriptor.
  • The USB device returned an invalid Microsoft OS container ID descriptor.
  • The USB device returned an invalid Microsoft OS extended configuration descriptor.
  • The USB device returned an invalid product description string descriptor.
  • The USB device returned an invalid serial number string descriptor.

The following screen shot shows the Device Manager displaying an error message when the device returns an invalid configuration descriptor.

Hh451212.error_message_config(en-us,VS.85).png

 

 

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