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Acpi Controller Drivernewfamous

Location: on Microsoft ACPI-Compliant System. The drivers for this device are not installed. (Code 20) There are no compatible drivers for this device. To find a driver for this device, click Update Driver. I did try to click Update Driver and come up empty to install the driver. Microsoft ACPI-Compliant Embedded Controller - Driver Download. Vendor:. Product: Microsoft ACPI-Compliant Embedded Controller. Hardware Class: System. Search For More Drivers.: Go! Windows 10 32-Bit Driver.

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Unknown Device: Microsoft ACPI-Compliant Embedded Controller (Lenovo Thinkbook 15) 2020-06-11, 4:49 AM With ref to my device manager, there is unknow device after upgrading to Windows 10 Enterprise. If the system requires ACPI BIOS changes to accurately reflect the USB port configuration, you should consider the user's ability to connect a device to the port when you configure the port. If you use ACPI to specify the configuration of a USB port, you must define the USB port capabilities (UPC) and physical location description (PLD) objects. I recently bought a Dell Studio 1558 laptop (which I've been very happy with), but updating my drivers today I noticed there was an 'Unknown device' in the 'Other devices' menu. I formatted my hard drive (leaving the reserved OEM partition) after receiving the laptop and turning it on to check it bo.

If the system requires ACPI BIOS changes to accurately reflect the USB port configuration, you should consider the user's ability to connect a device to the port when you configure the port.

If you use ACPI to specify the configuration of a USB port, you must define the USB port capabilities (_UPC) and physical location description (_PLD) objects. Although the ACPI 6.0 specification does not specifically prohibit the use of only the _UPC object, the use of both objects more precisely indicates the user's ability to connect devices to the port. Using only the _UPC object might not set the device container grouping correctly or as expected.

Devices that are attached to the port are removable from the hub if the DeviceRemovable bit is set. The following table shows how the values of the ACPI objects for a given port affect the value of the USB hub descriptor DeviceRemovable bit that Windows reports for the device.

USB Port StatusExample_UPC.PortIsConnectable byte_PLD.UserVisible bit (bit 64)Resulting DeviceRemovable Bit Value

Port is visible and the user can freely connect and disconnect devices.

Port is exposed on the face of a panel on the computer that is visible to the user.

Set (0xFF)

Set (1)

Set

Port is hidden or internal and user cannot freely connect and disconnect devices.

Port is directly hard-wired to an integrated device, such as a laptop webcam or an internal USB hub.

Set (0xFF)

Cleared

Cleared

Port is physically implemented by the USB host controller, but is not used.

Port is an excess port that is not connected to a port plug terminal or an integrated device.

Cleared (0x00)

Clear

Cleared

Note It is an invalid configuration to define a port as not connectable but visible to the user.

The following examples show correctly formed ACPI Source Language (ASL) that demonstrates the use of the _UPC and _PLD objects to describe a USB port:

  • To specify a port that is internal (not user visible) and can be connected to an integrated device, the _UPC.PortIsConnectable byte must be set to 0xFF and the _PLD.UserVisible bit must be set to 0.

    In the following example the device is grouped with the computer's device container.

  • To specify a port that is external (user visible) and can be connected to an external device, the _UPC.PortIsConnectable byte must be set to 0xFF and the _PLD.UserVisible bit must be set to 1. The _UPC.PortConnectorType byte must be set to the appropriate USB connector type as specified in Section 9.13 of the ACPI 3.0 specification.

    In the following example the device is assigned a new device container and is displayed as a separate physical device.

A USB Type-C connector must be correctly described in ACPI in order to pass the USB Type-C ACPI Validation Hardware Lab Kit test.

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Example _UPC for a USB Type-C connector:

For more information about the ACPI 6.0 interface, see Advanced Configuration and Power Interface Specification Revision 6.0.

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An Advanced Configuration and Power Interface (ACPI) control method is software that declares and defines operations to query and configure system hardware. An ACPI-compatible system provides a minimal set of control methods. Control methods are written in the ACPI Source Language (ASL), compiled by an ASL compiler into ACPI Machine Language (AML), loaded from the system firmware into the ACPI namespace, and interpreted by the ACPI driver.

Kernel-mode device drivers that comply with the requirements of Kernel-Mode Driver Framework (KMDF) or Windows Driver Model (WDM) can evaluate ACPI control methods by using device control requests. Starting with Windows 8, user-mode drivers that comply with the requirements of User-Mode Driver Framework (UMDF) can use device control requests to evaluate ACPI control methods. Typically, a driver evaluates ACPI control methods to start or configure platform-specific functions. A driver can evaluate ACPI control methods within the namespace of the physical device object (PDO) for which it is loaded. For drivers loaded in the device stack of an ACPI-enumerated device, the ACPI driver is always the bus driver that created and operates the PDO in the device stack. This capability includes evaluating control methods that are supported by child objects that are descendants of a parent device.

A driver evaluates control methods by sending one of the following IRP_MJ_DEVICE_CONTROL requests to a device.

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  • This request synchronously evaluates a control method that is supported by the device to which the request is sent. To use this IOCTL, a driver for the device supplies input and output method argument buffers, the name of a method, and an event object that waits for the request to complete. The method must be an immediate child object in the ACPI namespace of the device to which the request is sent.

  • This request asynchronously evaluates a control method that is supported by the device to which the request is sent. To use this IOCTL, a driver for the device supplies input and output method argument buffers, the name of a method, and an IoCompletion routine that the I/O manager calls after all lower-level drivers have completed the request. The method must be an immediate child object in the ACPI namespace of the device to which the request is sent.

  • This request synchronously evaluates a control method that is supported by the device or a descendant child object of the device to which the request is sent. To use this IOCTL, a driver for the device supplies input and output method argument buffers, the path and name of the control method in the ACPI namespace of the device, and an event object that waits for the request to complete.

  • This request asynchronously evaluates a control method that is supported by the device or a descendant child object of the device to which the request is sent. To use this IOCTL, a driver for the device supplies input and output method argument buffers, the path and name of the control method in the ACPI namespace of the device, and an IoCompletion routine that the I/O manager calls after all lower-level drivers have completed the request.

For more information about how to evaluate ACPI control methods synchronously, see Evaluating ACPI Control Methods Synchronously. For more information about how to evaluate ACPI control methods asynchronously, see IOCTL_ACPI_ASYNC_EVAL_METHOD and IOCTL_ACPI_ASYNC_EVAL_METHOD_EX.

For a driver of a device to evaluate a control method that is not an immediate child object of the device, the driver must supply the path and name of the method in the ACPI namespace of the device. To help obtain the path and name of child objects of a device, Windows supports the IOCTL_ACPI_ENUM_CHILDREN request, which a driver for a device can use to enumerate the following:

  • The device and its immediate child devices.

  • The device and all its descendant child devices.

  • Descendant child objects of a supplied name in the ACPI namespace of the device including, in particular, control methods.

For information about how to enumerate devices and methods in the namespace of a device, see Enumerating Child Devices and Control Methods.

For information about system-supplied macros that a driver can use to help evaluate control methods, see Control Method Macros.

For more information about ACPI devices, control methods, and namespaces, see the Advanced Configuration and Power Interface Specification.