Ubuntu Wiki

Summary

• We need a power management interface to allow a GUI application to interact with power management in a consistent form, even though each platform currently presents an entirely different powermanagement layer.
• We also want the system to be able to notify apps when a power event occurs.

• It would be nice to be able to tie into !PowerManager in the future.

• Or use perhaps GNOME Power Manager http://gnome-power.sourceforge.net/ with its DBUS and gconf backends?

Specification

• This interface needs to be able to parse config from all preexisting power management apps - pbbuttonsd, acpid, etc
• Must be able to blacklist events
• Must enable gnome etc to synthesize events so that, eg, flexiserver can suspend the machine.
• Preferably present a dbus API for querying capabilities, calling events, and sending events
• Packages must be able to register requirements to the power management system
• APM policy must move to userspace
• Proxy existing daemons so that their output goes to the PMI; pbbuttonsd has code to do this for PMU and APM, should be trivial to add ACPI.

Short term

• Use flexiserver to call events directly in the short term?

• Need to establish a list of PowerManagementSystemEvents for all power management styles to expose to PMI.