User:Bjordan/Chris Power MGMT

Control of power --> transmitter? vs. using repeater

OHM - "Open Hardware Manager" by Richard Hughes

Useful debugging tools for power management:

ohmd --verbose --no-daemon
lsohm # ohm's ideas of what state things are in
lshal # all things hal knows about status of battery, lid, etc
lshal --monitor # realtime, HW events broadcasted to ohm

Wakeup events: (all policy decisions go through ohm)

• Suspend mode - in Joyride
• Sleep mode - in Joyride
  • Wakeup doesn't work well in 703

Idleness detection: (don't want to turn off during an update)

• Mouse/keyboard idle for 60s?
• CPU also idle? # might be doing compile
• Has dbus signal inhibited suspend? or /etc/ohm/inhibit-idle-suspend
• Have tty1 or tty2 been used recently? (printing to or typing to)
• Are audio/camera devices in use? # Not implemented. Record, distance.
• DISTANCE: CHIRP ... idle for 10s ... CHIRP, etc. Not necessarily idle.

In linux: CPU-idle - different states a CPU can be in

Power breakdown: 703

• RAM 700mW DCON 200mW EC 100mW LCD 300mW CPU 1W-3W Backlight
• Maybe make a graph of progress?

Francesca: Mesh/antenna off? Joe: Hibernation mode?