User:Magick777/Opportunistic Power Saving
(→Design goals) |
(→Maintain phone in GSM mode by default when on battery) |
||
| Line 9: | Line 9: | ||
== Maintain phone in GSM mode by default when on battery == | == Maintain phone in GSM mode by default when on battery == | ||
| - | === | + | === Status === |
| + | |||
| + | * Switch to 2G on lock done, works for me, needs review for more blockers | ||
| + | * Switch back to 3G works for browser but needs some work | ||
| + | ** Move from detecting browser launch to a generic application launch handler | ||
| + | |||
| + | === Function specification === | ||
* Switch to GSM mode opportunistically when all seems to be quiet | * Switch to GSM mode opportunistically when all seems to be quiet | ||
| Line 20: | Line 26: | ||
**** but blockers don't apply if we're on WiFi | **** but blockers don't apply if we're on WiFi | ||
**** if we're on 3G then check for following blockers | **** if we're on 3G then check for following blockers | ||
| - | ***** location-daemon active (GPS in use) | + | ***** location-daemon active (GPS in use) NOT DONE YET |
| - | ***** SIP / Skype / GTalk calls (VoIP in use) | + | ***** SIP / Skype / GTalk calls (VoIP in use) NOT DONE YET |
*** don't change anything if the user didn't want the phone to lock anyway | *** don't change anything if the user didn't want the phone to lock anyway | ||
**** cooling off period during which device unlock cancels radio switch | **** cooling off period during which device unlock cancels radio switch | ||
Revision as of 00:44, 21 July 2010
Contents |
Opportunistic Power Saving
This page aims to set forth a design for opportunistic power saving on the Nokia N900. Existing power-saver scripts and applets allow the user to toggle settings manually and much has been written about automation of certain events through DBUS. This page is an attempt to tie it all together.
CPU frequency scaling / underclocking
This is already documented on the Overclocking page and is my starting point for building an opportunistic power saving script, based on phone lock / unlock. Credits and thanks to Fecn for getting us this far.
Maintain phone in GSM mode by default when on battery
Status
- Switch to 2G on lock done, works for me, needs review for more blockers
- Switch back to 3G works for browser but needs some work
- Move from detecting browser launch to a generic application launch handler
Function specification
- Switch to GSM mode opportunistically when all seems to be quiet
- trigger analysis on phone locked
- first check for blockers, most common first
- don't change anything if we're in the desired radio mode
- don't change anything if we're on charge and not saving battery
- don't change anything if we're on a GSM call
- don't change anything if we have blocker applications or connections running
- but blockers don't apply if we're on WiFi
- if we're on 3G then check for following blockers
- location-daemon active (GPS in use) NOT DONE YET
- SIP / Skype / GTalk calls (VoIP in use) NOT DONE YET
- don't change anything if the user didn't want the phone to lock anyway
- cooling off period during which device unlock cancels radio switch
- perform any final sanity checks
- recheck that we're still not on a call after our cooling off period
- then make the switch to GSM mode
- Switch automatically to 3G or dual mode when something requires it
- no sense in triggering on device unlock, wait until needed
- check for blockers
- don't change anything if we're already in the target radio mode
- don't change anything if we're already using WiFi
- don't change anything if we're on a voice call
- trigger on events that may require a data connection i.e.
- launch new application (via hildon desktop)
- browser
- SIP client
- maps
- set presence to Online
- open Modest e-mail account
- access Internet radio stream
- launch new application (via hildon desktop)