HAL

GNOME Power Manager gets all information from HAL using information from org.freedesktop.Hal. GNOME Power Manager does not do independent probing for data, it relies on HAL, in this way it can stay very lightweight and uncomplicated. Its goal is to be architecture neutral and free of polling and other hacks.

The role GNOME Power Manager, HAL, and the Kernel play in Power Management.

How does HAL help?

HAL is the de-facto Hardware Abstraction Layer for the Linux desktop. David Zeuthen (and myself and lots of others) have written different addons for hald (the HAL daemon) that populate different devices with additional properties, e.g. battery.charge.current_level that can be queried in an architecture-neutral way.

With all the new HAL code, and the GNOME Power Manager services, we can disable loading of pmud/acpid/apmd and keep everything managed in one place.

New ACPI objects in the HAL device tree.

Pressing the power/sleep/lid buttons now generate events

Using the new methods in HAL CVS: org.freedesktop.Hal.Device.SystemPowerManagement.Suspend ()

Downloads

GNOME Power Manager should come bundled with most modern distributions.

The latest source releases can always be found at the GNOME ftp site.

Make sure to get latest release of HAL, the service that GNOME Power Manager depends on.

Feedback

Bugs should be reported to the GNOME Bug Tracking System.

Please read the FAQ and the bug reporting guidelines before creating a new bug.

You can get in touch with developers and other users by sending a mail to the Power Manager mailing list or search the [archives].

Copyright © 2005-2007, Richard Hughes.
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