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Virtual COM port (VCP) drivers cause the USB device to appear as an additional COM port available to the PC. Application software can access the USB device in the This page contains the VCP drivers currently available for FTDI devices. For D2XX Direct drivers, please click here. COMPortAssignment is a free utility that is used for assigning the COM Port numbers of FTDI devices. It runs under Windows XP, Vista and Windows 7. COMPortAssignment utility is available for download as a.zip file by clicking here.

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This article helps to fix an issue in which Windows 10 doesn't install specific drivers for USB audio devices on the first connection.

Original product version: Windows 10, version 1703
Original KB number: 4021854

Symptom

When you connect a USB audio device to a Windows 10 Version 1703-based computer the first time, the operating system detects the device but loads the standard USB audio 2.0 driver (usbaudio2.sys) instead of the specific device driver.

Cause

This issue occurs because the USB audio 2.0 driver (usbaudio2.sys) isn't classified as a generic driver in Windows 10 Version 1703. Therefore, the system assumes that a compatible, nongeneric driver is installed for the device even though the driver is generic.

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This issue also causes Windows 10 Version 1703 to postpone the search for other compatible drivers through Windows Update that typically occurs immediately after you install a new device.

Resolution

To fix this issue, use one of the following methods.

Method 1

To resolve this issue, install update 4022716.

Method 2

If the device-specific driver is distributed through Windows Update, you can manually update the driver by using Device Manager. For more information about how to do this, see update drivers in Windows 10.

Method 3

If the device is not yet connected, first install the device-specific driver, such as by using the appropriate installer. After the device-specific driver is installed, Windows 10 will select that driver instead of the standard USB audio 2.0 driver when you first connect the device.

Note

See the device manufacturer's user guide for specific instructions about how to install the driver.

Method 4

If the driver isn't distributed through Windows Update, you can manually reinstall the driver. To do this, follow these steps:

  1. Install the device-specific driver (see Method 2).
  2. Open Device Manager.
  3. Right-click (or tap and hold) the name of the device, and then select Uninstall.
  4. Restart the computer.

When it restarts, Windows will try to reinstall the device by using the device-specific driver.

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This topic describes the USB hardware verifier tool (USB3HWVerifierAnalyzer.exe) that is used for testing and debugging specific hardware events.

Most hardware issues manifest in ways that lead to poor end-user experience and it's often difficult to determine the exact failure. The USB hardware verifier aims at capturing hardware failures that occur in a device, port, hub, controller, or a combination of them.

The USB hardware verifier can perform these tasks:

  • Capture hardware events and display information in real time.
  • Generate a trace file with information about all events.
  • Parse an existing trace file for event information.

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Drivers elprotronic taylormade. This topic contains the following sections:

Getting the USB hardware verifier analyzer tool

The USB hardware verifier tool is included with the MUTT software package that is available for download at Tools in the MUTT software package.

The tools package contains several tools that perform stress and transfer tests (including power transitions) and SuperSpeed tests. The package also has a Readme document (available as a separate download). The document gives you a brief overview of the types of MUTT hardware. It provides step-by-step guidance about various tests you should run, and suggests topologies for controller, hub, device, and BIOS/UEFI testing.

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How to capture events by using a USB hardware verifier

To capture events by using the hardware verifier, perform these steps:

  1. Start a session by running this command at an elevated command prompt.

    The tool supports these options:

    OptionDescription

    -v <VendorID>

    Logs all hardware verifier events for the specified VendorID.

    -p <ProductID>

    Logs all hardware verifier events for the specified ProductID.

    -f <ETL file>

    Parses the specified ETL file. Real-time parsing is not supported. With this option, the tool parses the file offline.

    /v output

    Displays all events to the console.

  2. Run the test scenario for which you want to capture hardware events.

    During a session, USB hardware verifier captures information about hardware events as they occur. If you want to filter events for a particular hardware, specify the VendorId and ProductId of the hardware. The tool might not capture some information (such as VID/PID) about events that occur before the device gets fully enumerated. The missing information is available in the detailed report that is generated at the end of the session (discussed next).

    Here is an example output from the hardware verifier tool:

  3. Stop the session by pressing CTRL+C.

    At the end of the session, a file named AllEvents.etl is added in the current directory. This file contains trace information about all events that were captured during the session.

    In addition to AllEvents.etl, the command window shows a report. The report includes certain information that was missed in the real-time output. The following output shows an example test report for the preceding session. The report shows all events that the USB hardware verifier encountered.

    In the preceding example report, note the Key field value for each record. The report categorizes the information by those Key values, making it easier to read. The same Key values are used in events captured in AllEvents.etl.

  4. Convert AllEvents.etl to text format by running the following command:

    In the output file, search for the previously noted Key Hercules input devices driver download. values. The values are associated with one of these fields: fid_UcxController, fid_HubDevice, and fid_UsbDevice.

  5. Open AllEvents.etl in Netmon and select Add <field_name> to display filter to filter events by controller, hub, and device.

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USB hardware verifier flags

FlagIndicates that ..
DeviceHwVerifierClientInitiatedResetPipeThe client driver initiated a recovery action by resetting a particular pipe in response to I/O failures. Certain client drivers might perform error recovery in other scenarios.
DeviceHwVerifierClientInitiatedResetPortThe client driver initiated a recovery action by resetting the device in response to I/O failures. Certain client drivers might perform error recovery in other scenarios.
DeviceHwVerifierClientInitiatedCyclePortThe client driver initiated a recovery action by cycling the port. This flag causes the Plug and Play Manager to re-enumerate the device.
DeviceHwVerifierSetIsochDelayFailureA USB 3.0 device failed the SET_ISOCH_DELAY request. The device can fail the request because either the driver does not require the request information or a transient error occurred. However, the driver cannot differentiate between those reasons. This error is not captured in the report.
DeviceHwVerifierSetSelFailureA USB 3.0 device failed the SET_SEL request. The device uses the request information for Link Power Management (LPM). The device can fail the request because either the driver does not require the request information or a transient error occurred. However, the driver cannot differentiate between those reasons. This error is not captured in the report.
DeviceHwVerifierSerialNumberMismatchOnRenumerationThe device reported a different serial number during re-enumeration as opposed to the one it reported during initial enumeration. A re-enumeration can occur as a result of a reset port or system resume operation.
DeviceHwVerifierSuperSpeedDeviceWorkingAtLowerSpeedThe USB 3.0 device is operating a bus speed lower than SuperSpeed.
DeviceHwVerifierControlTransferFailureA control transfer failed to the device's default endpoint failed. The transfer can fail as a result of device or controller error. The hub logs indicate the USBD status code for the transfer failure. This flag excludes SET_SEL and SET_ISOCH_DELAY control transfers failures. Those types of requests are covered by DeviceHwVerifierSetIsochDelayFailure and DeviceHwVerifierSetSelFailure flags.
DeviceHwVerifierDescriptorValidationFailureA descriptor returned by the device does not conform to the USB specification. The hub log indicates the exact error.
DeviceHwVerifierInterfaceWakeCapabilityMismatchThe RemoteWake bit is incorrectly set in the device. USB 3.0 devices that support remote wake must also support function wake. There are two ways in which the device indicates its support for function wake. The first way is through the bmAttributes field of the configuration descriptor and the second way is in its response to the GET_STATUS request targeted to the interface. For a non-composite device, the RemoteWake bit value must match the value returned by the GET_STATUS request that is targeted to interface 0. For composite devices, the RemoteWake bit must be 1 for at least one of the functions. Otherwise, this flag indicates that the device reported contradictory values in here.
DeviceHwVerifierBusRenumerationThe device is re-enumerated on the bus. A re-enumeration can occur as a result of a reset port or system resume operation. Re-enumeration also occurs, when the device is disabled/enabled or stopped/started.
HubHwVerifierTooManyResetsA hub has gone through too many reset operations within a short period. Even though those resets were successful, the hub is not processing requests and repeated errors occur.
HubHwVerifierControlTransferFailureA control transfer targeted to the hub's default endpoint failed. The transfer can fail as a result of device or controller error. The hub logs indicate the USBD status code for the failure.
HubHwVerifierInterruptTransferFailureA data transfer targeted to the hub's interrupt endpoint failed. The transfer can fail as a result of device or controller error. The hub logs indicate the USBD status code for the failure. If the transfer failed because of the request was canceled, the failure is not captured.
HubHwVerifierNoSelectiveSuspendSupportThe RemoteWake bit is not set to 1 in the hub's configuration descriptor.
HubHwVerifierPortResetTimeoutWhile enumerating or re-enumerating a device, the port-reset operation is timing out. A port change notification is not received indicating that the port-reset is complete.
HubHwVerifierInvalidPortStatusThe port status of the target port is not valid as per the USB specification. Certain devices can cause the hub to report the invalid status.
HubHwVerifierPortLinkStateSSInactiveThe link between the target port and the downstream device is in an error state.
HubHwVerifierPortLinkStateComplianceThe link between the target port and the downstream device is in compliance mode. In some scenarios involving system sleep-resume, the compliance mode error is expected and in those cases the failure is not captured.
HubHwVerifierPortDeviceDisconnectedThe downstream device on the target port is no longer connected to the bus.
HubHwVerifierPortOverCurrentThe downstream port reported overcurrent state.
HubHwVerifierControllerOperationFailureA controller operation (such as enabling device, configuring endpoints) failed for the device that is attached to the target port. Failures from SET_ADDRESS and Reset endpoint requests are not captured.
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