User Power Experience: Difference between revisions

From OLPC
Jump to navigation Jump to search
No edit summary
m (moved UserExperience Power to User Power Experience: Misnamed when originally opened)
(No difference)

Revision as of 14:16, 10 January 2011

This is an attempt at describing the different power states provided by the different OLPC devices.

Power States

The following table tries to describe what parts of a particular device are powered in a given state.

State: Run Idle Screen Saver Sleep Off Notes
XO-1
Proc X
Memory X X X X
Display X X
Audio X
Kbd/Tpd X X X X
WLAN X X X X non-ideal
USB X
State: Run Idle Screen Saver Sleep Off Notes
XO-1.5
Proc X
Memory X X X X
Display X X
Audio X
Kbd/Tpd X X X X non-ideal
WLAN X X X
USB X non-ideal
State: Run Idle Screen Saver Sleep Off Notes
XO-1.75
Proc X X X X enters low power mode when not running
Memory X X X X
Display X X
Audio X X X
Kbd/Tpd X X X
Touchscreen X X X
WLAN X X X
USB X X X
State: Run Idle Screen Saver Sleep Off Notes
iPad
Proc X X na X
Memory X X na X
Display X X na
Audio X X na X
WLAN X X na X bcast only ?

Terms

Run

This state is when the laptop is actively computing.

Idle

This state is when the laptop is not actively computing, and it has seen no rece nt user input or network activity.

Screen Saver

Sleep

Off

Devices

The following are the devices described in the tables:

Proc

Processor refers to both the actual central processing unit of the laptop, as well as the graphics subsystem and clock generator feeding the CPU and other subsystems.

Memory

Memory refers to the laptop's volatile storage.

Display

Display refers to the entire display subsystem, including the DCON (used to maintain a displayed image when the processor is powered off.

Audio

Kbd/Tpd

This refers to the keyboard and touchpad provided on the laptop.

WLAN

This is the wireless networking unit.

Touchscreen

USB