Datasheet

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powermanagement. For more options, modify the script /usr/sbin/

acpid_proxy or the acpid conﬁguration in /etc/acpi/.

Unlike apmd, little is preconﬁgured here, as ACPI in Linux is still in a very

dynamic development stage. If necessary, conﬁgure acpid according to

your needs. If you have any suggestions regarding preparatory actions,

17.3.3 ACPI Tools

The range of more or less comprehensive ACPI utilities includes tools that

merely display information, like the battery charge level and the temper-

ature (acpi, klaptopdaemon, wmacpimon, etc.), tools that facilitate

the access to the structures in /proc/acpi or that assist in monitoring

changes (akpi, acpiw, gtkacpiw), and tools for editing the ACPI tables

in the BIOS (package pmtools).

17.3.4 Troubleshooting

There are two different types of problems. On one hand, the ACPI code of

the kernel may contain bugs that were not detected in time. In this case, a

solution will be made available for download. More often, however, the

problems are caused by the BIOS. Sometimes, deviations from the ACPI

speciﬁcation are purposely integrated in the BIOS to circumvent errors in

the ACPI implementation in other widespread operating systems. Hard-

ware components that have serious errors in the ACPI implementation are

recorded in a blacklist that prevents the Linux kernel from using ACPI for

these components.

The ﬁrst thing to do when problems are encountered is to update the BIOS.

This will solve many problems. If the computer does not boot properly, one

of the following boot parameters may be helpful:

pci=noacpi Do not use ACPI for conﬁguring the PCI devices.

acpi=oldboot Only perform a simple resource conﬁguration. Do not use

ACPI for other purposes.

acpi=off Disable ACPI.

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17.3. ACPI