Power Management Software

From OLPC

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Contents 1 Design 2 Open bugs 3 Frequently Asked questions 4 Current Priorities:

[edit] Design

• Power Management Interface
• Power Management Scenarios

[edit] Open bugs

• Suspend and resume not working yet (Trac #508)
• The battery charging algorithms have problems

[edit] Frequently Asked questions

• Why does the power button (hardware) do nothing? Will it send out keycodes or some other events in the future?

• It does send a keycode

• How do you change the backlight brightness from a program (rather than the keyboard buttons)?

• See DCON

• How is the brightness level being changed? Some embedded EC? OF? Do we get a userspace signal/event when the user changes it?

• See DCON

• DPMS seems not to work. "sleep 1 && xset dpms force off" does nothing.

• DPMS needs to be taught how to work with the DCON

• Where are per-session settings meant to be stored? GConf? How much configuration should there be allowed?

• What?

[edit] Current Priorities:

• Stable Suspend to RAM (Stable means: pass 1000 consecutive suspend/resume cycles without a glitch)
• Battery class stuff integrated with HAL.
• Software control of backlight in HAL.
• Small session daemon created that exposes a similar DBUS interface to g-p-m.
• Sugar UI element created for telling how much charge we have left (DONE)
• Sugar UI element created for configuration?