Kernel Parameters for Advanced Configuration and Power Interface (ACPI)

Support knowledgebase (81_acpi)
Applies to

SuSE Linux: Version 8.1

Situation

You want to control the operation of ACPI. The new ACPI code is already used in SuSE Linux 8.1 and newer versions. The new ACPI code has been adopted because many new computers use ACPI to control their interrupt handling. In addition, the power management of new machines is no longer based on APM, but on ACPI. On the other hand, some old computers might have problems due to an incomplete or unstable ACPI implementation in the BIOS. For more background information, refer to:

http://www.suse.de/en/private/products/suse_linux/i386/acpi.html

Procedure

Due to the reasons mentioned above, SuSE Linux 8.2 contains several kernel parameters to control the ACPI code:

The parameters included in SuSE Linux 8.1 are:

The parameters pci=noacpi and acpi=force are not included in SuSE Linux 8.1. The update kernel available for SuSE Linux 8.1 acts in the same way as the SuSE Linux 8.2 kernel.

When using ACPI on multiprocessor computers, APIC must often be activated, too. This can be done with the kernel parameter apic.

These kernel parameters can be activated before the installation by passing them to the kernel at the boot prompt. If you do this before installing, the parameters will be automatically adopted by the boot loader configuration. It is also possible to enter the parameters in the boot loader configuration in YaST2. For more information about YaST2's boot loader configuration, refer to the manual. Further information on ACPI is available on the home page of the ACPI development project (http://acpi.sf.net).


See also:
o Inserting Boot Options Permanently

Keywords: ACPI, KERNEL, PARAMETER, IRQ, POWER, MANAGEMENT, APM, 81

Categories: Kernel

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SDB-81_acpi, Copyright SuSE Linux AG, Nürnberg, Germany - Version: 07. Oct 2002
SuSE Linux AG - Last generated: 13. Jun 2003 by ip (sdb_gen 1.40.0)