Letux Kernel

Power-Management

You are looking at an old revision of the page Power-Management. This revision was created by Julius Bünger.

Table of Content

Device power consumption

Power consumption of running GTA04

With screen off in idle it should be ~75mA, with screen on it should be ~200mA

http://lists.goldelico.com/pipermail/gta04-owner/2012-July/002660.html

Power consumption of GTA04 in suspend

During suspend all devices except modem and RAM should be turned off. Currently 3.5 kernel draws in this state ~25mA. This was tested with QtMoko v49. The numbers vary on your location and can be in interval 22..35mA.

Modem consumption

Modem should normally draw 3..10mA, but it can be a lot more when signal is bad.

http://lists.goldelico.com/pipermail/gta04-owner/2012-November/003397.html

Gyroscope consumption

6mA (at 2.8V) about 2-3 mA at battery voltage

http://lists.goldelico.com/pipermail/gta04-owner/2012-August/002767.html

Latest Discussion about Power Consumption

http://lists.goldelico.com/pipermail/gta04-owner/2015-September/006735.html

The following script can be used to measure power consumption.

It disables charging, suspends for 5 minutes and reports apparent power usage by monitoring the battery.

http://git.goldelico.com/?p=gta04-kernel.git;a=blob;f=Letux/root/measure-suspend;h=95f9ebcba688f91002b2da72bbc03f7dfcf1f82d;hb=dae7865eff2e4ce9a2c8375e5f11e2fcb2b8fde6