BIOS recovery steps incompatible with Con ACPI

June 21, 2020 by Christian Longman


If your computer does not have a compatible BIOS error, take a look at these troubleshooting ideas.

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ACPI (Advanced Configuration and Power Interface) is an industry specification for the efficient power management of desktop and mobile computers. ACPI defines how the underlying input / output system, operating system, and computer peripherals communicate with each other using power.

bios no compatible con acpi


How do I enable ACPI in BIOS?

Press the BIOS key that appears in the system startup messages. On most computers, this is one of the F keys, but the other two common keys are the Esc or Del keys. Highlight "Power Management" and press Enter. Highlight the “ACPI” setting, press Enter and select “Activate”.


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In a computer, the Advanced Power and Configuration Interface (ACPI) provides an open standard that allows operating systems to recognize and configure the computer’s hardware components, manage power by putting unused (unused) components into sleep mode, and monitoring status. ACPI was first published in December 1996 and is intended to replace Advanced Power Management (APM), the multiprocessor specification, and the Plug and Play BIOS (PnP) specification. [1] ACPI supports operating system power management, unlike the previous BIOS-based system, which used platform-specific power management and configuration guides to determine the platform-specific firmware. [2] The specification is of paramount importance for the configuration controlled by the operating system and the power management system (OSPM), an implementation for ACPI, which is responsible for managing the device through the old firmware interface. Interfaces removed.

Internally, ACPI reports the available components and their functions to the kernel of the operating system.using lists of instructions (“methods”) that are provided by the system’s analyzed firmware (UEFI or BIOS). the core. Then ACPI performs the necessary operations written in the ACPI machine language (for example, initialization of hardware components) using a minimal integrated virtual machine.

Intel, Microsoft, and Toshiba initially developed the standard, while HP, Huawei, and Phoenix also participated later. In October 2013, the ACPI Special Interest Group (ACPI SIG), the first developer of the ACPI standard, agreed to transfer all assets to the UEFI Forum, where all future developments will take place. [3]

Architecture [edit]

The ACPI at the firmware level consists of three main components: ACPI tables, ACPI BIOS, and ACPI registers. Unlike its predecessors, such as APM or PnP BIOS, ACPI does not realize much of its functionality in ACPI BIOS code, the main task of which is to load ACPI tables into system memory. Instead, most of the ACPI firmware functionality is provided in the ACPI Machine Language (AML) bytecode, lowA Turing-complete, domain-specific language that is stored in ACPI tables. [5] To use these tables, the operating system must have an interpreter for the AML bytecode. The reference implementation of the AML interpreter is provided by the ACPI Component Architecture (ACPICA). During BIOS development, AML bytecode is compiled from ASL code (ACPI source language). [6] [7]

Since ACPI also replaces the PnP BIOS, it also offers a hardware enumerator, which is mainly implemented in the ACPI DSDT table (Differentiated System Description Table). An advantage of the bytecode approach is that, unlike the PnP BIOS code (16 bits), the ACPI bytecode can be used on any operating system, even in 64-bit mode. [7]

The whole design decision was not without criticism. In November 2003, Linus Torvalds, author of the Linux kernel, called ACPI "a complete design disaster in every way." [8] [9] In 2001, other developers of old Linux software, such as Alan Cox, expressed concern about the need forThat the bytecode from an external source must be run with all kernel permissions. as well as the overall complexity of the ACPI specification. [10] In 2014, Mark Shuttleworth, founder of the Ubuntu Linux distribution, compared ACPI with trojans. [11]

ACPI Component Architecture (ACPICA) [edit]

The ACPI component architecture (ACPICA), written primarily by Intel engineers, provides an open source reference implementation that is independent of the operating system's ACPI code platform. [12] ACPICA code is used by Linux, Haiku and FreeBSD, [6] , which complement it with operating system-specific code.

History [edit]

The first edition of the ACPI specification was published in December 1996 and supports 16- and 32-bit address spaces. Only in August 2000, ACPI received support for 64-bit addressing, as well as support for multiprocessor workstations and servers with version 2.0.

In September 2004, version 3.0 was released, which supports the ACPI specification for SATA controllers, PCI Express bus, support for Multiprocessor systems for more than 256 processors, ambient light sensors and devices. user presence, and the thermal model has been expanded to include the previous one centered on the processor. Support is higher.

Version 4.0 of the ACPI specification, released in June 2009, added several new features to the design. Most notable are USB 3.0 support, inactive logical processor support, and x2APIC support.

Revision 5.0 of the ACPI specification was published in December 2011. [13] , followed by revision 5.1, which was published in July 2014. [14]

Operating Systems [edit]

Microsoft Windows 98 was the first operating system to implement ACPI, [15] [16] , but its implementation was somewhat imperfect or incomplete, [17 ] [18] , although some of the problems associated with it are caused by first-generation ACPI hardware. [19] Windows 98 First Edition turned off ACPI by default, with the exception of the white list of systems. Other operating systems, including later versions of Windows, eComStation, FreeBSD, NetBSD, OpenBSD, HP-UX, OpenVMS, Linux, and the Solaris PC versions at least partially support ACPI. [20] Some newer operating systems, such as Windows Vista (and a later version of Microsoft Windows), require an ACPI-compatible BIOS [21] .

The Linux kernel 2.4 series had minimal ACPI support, although improved support has been implemented (and enabled by default) since kernel version 2.6.0. [23] Older ACPI BIOS implementations are generally quite buggy and therefore not supported by later operating systems. For example, Windows 2000, Windows XP, and Windows Server 2003 use ACPI only if the BIOS date is after January 1, 1999, and for Windows 98 Second Edition this date is December 1, 1999. [24] Similarly, the Linux 2.6 kernel blacklisted every ACPI BIOS until January 1, 2001. [23]

OSPM Responsibilities [edit]

Once an OSPM-compatible operating system activates ACPI, it gains exclusive control over all aspects of power management and device configuration. An OSPM implementation should make an ACPI-compliant environment available for device drivers в, thereby revealing certain states of the system, device and processor.

Execution States [edit]

The specification also defines an inherited state: state in an operating system that does not support ACPI. In this state, the material and power supply are not controlled through ACPI, which effectively deactivates ACPI.

CPU States [edit]

Execution Status [edit]

When a peripheral device or processor (D0 or C0) is running, it may be in one of several performance states. These conditions are implementation dependent. However, P0 is still the highest performing state. where P1-Pn are successively weaker states up to a certain limit for the realization of n, which does not exceed 16. [34]

P-states are known in Intel processors as SpeedStep, as PowerNow! or Cool'n'Quiet in AMD processors and, like PowerSaver in VIA processors.

Hardware Interface [edit]

ACPI-compliant systems communicate with hardware through a “functionally-fixed interface (FFH)” orA platform-independent hardware programming model based on the machine language ACPI (AML) for a specific platform from the original device manufacturer (OEM).

Fixed hardware interfaces are platform-specific features provided by platform manufacturers to improve performance and troubleshoot issues. Standard Intel-based PCs have a fixed function interface defined by Intel [35] , which provides a number of basic functions that meet the requirements of an ACPI-compatible system for driver packages. In order to provide basic functions, reduce the startup time or serious system failure.

The ACPI Platform Error Interface (APEI) is a specification for reporting hardware errors, for example, from the chipset to the operating system.

Firmware Interface [edit]

ACPI defines many tables that form the interface between an ACPI-compatible operating system and system firmware. This includes, for example, Differentiated System Description Table (DSDT), WTO Description TableSystem Code (SSDT) ​​and Static Resource Matching Table (SRAT). [36]

Tables allow you to independently describe the hardware platform of the system and are presented as permanently formatted data structures or in AML.



How do I disable ACPI in BIOS?

You can disable acpi under power management in BIOS. Usually it is on the top line, and you just press Enter and go from Enable to Disable. When you do this, Windows will reconfigure your operating system, and you may need to restart some drivers.


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