On Tue, 28 Aug 2012 08:21:20 -0400 Benjamin Deering <ben_deer...@swissmail.org> wrote:
> On 08/28/2012 07:44 AM, robin wrote: > > hi ben, > > > > could you please give some more detail on how do you set it in woods mode? > > and does the gsm power on afterwards correctly or do you have to restart the > > phone? > > > > thanks > > > > robin > > > > > > ps: here is the link to the paper on powerconsumption of the freerunner: > > > > http://www.ssrg.nicta.com.au/publications/papers/Carroll_Heiser_10.pdf > > > > > > _______________________________________________ > > Openmoko community mailing list > > community@lists.openmoko.org > > http://lists.openmoko.org/mailman/listinfo/community > > > I use SHR most of the time, but the same thing should apply. I just > meant to change the GUI to call 'airplane mode' 'woods mode' because my > phones go in the woods and I don't fly very much at all. I suspect > something is wrong with airplane mode on both qtmoko and SHR for gta04 > if airplane mode doesn't use less power. Transmitting would be the > biggest power draw and even if the modem remained powered up power > consumption should drop unless it is transmitting. > > On gta02, I could turn 'airplane mode' off and on and it usually > worked. I never spent a lot of time watching power consumption on > gta02, but I did keep track of battery life. On gta04, we are still > figuring out power management and I had some charging issues so I was > dumping 'current_now' once a second in various configurations. A > somewhat unrelated thing I noticed and should report is that the 'idle > dim' state of fsodeviced actually uses more power. The process of > smoothly dimming the display wakes up the CPU and by the time it settles > back down, it is time to turn off the display anyway. > > I didn't mean to steer this away from qtmoko, but I think most of the > power related issues we are seeing are happening at a low level and > apply to all distros. On a GTA02 you power off the GSM chip by writing AT@POFF to the modem. This definitely reduces power usage quite a lot. You then typically write '0' to the 'power_on' and 'reset' sysfs files, but that isn't so important I think. If you are using gsm0710muxd, it will do all that for you when you tell it to. You need to use some D-Bus command that I'm not familiar with. Something like bus-send --system --print-reply --type=method_call \ --dest=org.pyneo.muxer /org/pyneo/Muxer \ org.freesmartphone.GSM.MUX.SetPower bool:false maybe. NeilBrown
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