I just noticed same thing about powertop and tried to search that thread what you are talking about and right now my "**** this" meter hits quite high. I cant find it event with google.
Doesn't make sense to me. The whole point of the N900 to me is to be always online. That is always reachable by IM and if I need to surf the net and not near a PC I can do so from my N900. If I have to decide when to be recheable and guess when my friends would be reachable then not sure why the device would be referred to as always online. More like don't stay always online.
damn you are one guy that can be totally fooled with axe commercials
If you run IM app Fring on the Nokia E71, the battery can still last for 1-2 days. It can be done, I don't know if its extra optimization within Fring or special optimizations in the E71. The battery issue is not the larger screen of the n900 or CPU load as you can run comparison tests without screen at idle to prove it
This thing is tested.. I have 10/2MB connection on my n900 and it suck my battery dry in 3h.. I download 3g/2g mode selection applet and i try to use only 2g. Now my bat last easy over 12h-3day!!
2g is so slow..(215/89KB). Someone have to make software witch can automat change connection speed? Hsdpa and Hsupa suck very much power! Even skype does't run with 2G..
2g is so slow..(215/89KB). Someone have to make software witch can automat change connection speed? Hsdpa and Hsupa suck very much power! Even skype does't run with 2G..
Nokia Energy Profiler exists for Maemo5, it has been spotted in screenshots. There was a mailing list thread asking when/if people outside Nokia would get access to it. The response seemed positive. That was in November and nothing seems to have happened since, atleast I couldn't find any info on it.
For idle time life, powertop is way more useful than top, as it is wakeups that matter more than total cpu use. If application A uses 5 seconds of CPU time in one go, and application B uses 5 seconds of CPU time spread out in tiny pieces every half second for 10 hours, then B will use a few magnitudes more battery power.
The same can be said for 3g. On S60, Nokia Energy Profiler can tell you how costly wakeups of the radio are. If I understand the display correctly, any data moving requires the radio to stay on full power for 5 seconds. So, if skype or SIP sends a keep-alive ping every 10 seconds, the radio is on half the time. At full power I'd expect it to last 4 hours, so in this scenario I'm guessing 8-10 hour battery life. This 5 seconds value is supposedly determined by the operator.
So if you have 4 things that behave this way, it's likely they aren't synchronized with eachother, and then on average wake up the radio every 2.5 seconds, effectively keeping it on all the time.
EDGE is nicer for apps like that... 3g bad for frequent small transfers, but nice for short and intensive bursts of data.
I vaguely remember seeing an API from Nokia for apps to coordinate network activity, essentially a way for apps to tell eachother "Hey, I'm going to wake up the radio, got any stuff you want to send?". Unfortunately I've been unable to find this API again, I don't even remember if it was for maemo or s60 or what..
Nokia Energy Profiler exists for Maemo5, it has been spotted in screenshots. There was a mailing list thread asking when/if people outside Nokia would get access to it. The response seemed positive. That was in November and nothing seems to have happened since, atleast I couldn't find any info on it.
For idle time life, powertop is way more useful than top, as it is wakeups that matter more than total cpu use. If application A uses 5 seconds of CPU time in one go, and application B uses 5 seconds of CPU time spread out in tiny pieces every half second for 10 hours, then B will use a few magnitudes more battery power.
The same can be said for 3g. On S60, Nokia Energy Profiler can tell you how costly wakeups of the radio are. If I understand the display correctly, any data moving requires the radio to stay on full power for 5 seconds. So, if skype or SIP sends a keep-alive ping every 10 seconds, the radio is on half the time. At full power I'd expect it to last 4 hours, so in this scenario I'm guessing 8-10 hour battery life. This 5 seconds value is supposedly determined by the operator.
So if you have 4 things that behave this way, it's likely they aren't synchronized with eachother, and then on average wake up the radio every 2.5 seconds, effectively keeping it on all the time.
EDGE is nicer for apps like that... 3g bad for frequent small transfers, but nice for short and intensive bursts of data.
I vaguely remember seeing an API from Nokia for apps to coordinate network activity, essentially a way for apps to tell eachother "Hey, I'm going to wake up the radio, got any stuff you want to send?". Unfortunately I've been unable to find this API again, I don't even remember if it was for maemo or s60 or what..
very interesting, i like the profiler so my mini, i hope it shows up sometime for the n900
Nokia Energy Profiler exists for Maemo5, it has been spotted in screenshots. There was a mailing list thread asking when/if people outside Nokia would get access to it. The response seemed positive. That was in November and nothing seems to have happened since, atleast I couldn't find any info on it.
I think that we should have this software ASAP. At least for sake of extras testing users who should be watching for programs power management. Right now its quite hard.
Some extras testing software's get votes just because program is nice. Power management is something that cant be noticed if you do not keep program open full day and test different usage scenarios while program runs AND log usage with some user made script that are for most of people too hard to understand or use.
.edit
I think that this is really important because right now people are accusing Nokia for bad run time even tough reason could be bad power management by extras program that they have installed. Also it seems that already included and offical Skype and Gtalk protocols might be not fully optimized on power management.
..edit
Makes me just angry to read this: http://lists.maemo.org/pipermail/mae...er/021290.html
So maybe its somehow dangerous application that canīt be give to hands of users or something. That could be only reason that it doesn't exist in repositories.
