Re: Battery Life just got Amazing. 4 Days of Standby!
 

No custom kernel. Probably will try that too. Doing some more experiments, will post the batterygraph soon.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Well, it's not that it's not doing anything. Maybe the title is misleading, all this time it was connected to the Internet via WiFi and checking for mails via Nokia Messaging. I had the LED alerts disabled though.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I am still experimenting but my theory is one or all of these things helped.

1. Reflash with PR 1.2
2. Resetting my WiFi router, and setting it to only connect on G protocol. There is a possibility that some setting on the Wifi router was causing excessive traffic or drain on the N900 when connected to WiFi.
3. Switching from IMAP to Nokia Messaging. This maybe one big reason I think
4. Keeping the phone on 2G instead of 3G, 2G is good enough for me!
5. No widgets at all currently. I presume a widget which checks every 4 hours should not make much difference.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Thanks.
Do we need also to reflash the eMMC?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

WoW man thats super cool..................:rolleyes:
but its hard to believe that u are getting 21/2 days with(a few hours of calling, 1-2 hours of Wifi browsing)this kind of usage.......:eek:

are you sure that u have'nt changed any other settings???

2 hrs on wifi drains my battery by 20-30%....
1 hr of music-drains upto 5-10%
30mins video-drains upto 10-20%
my wifi is off,2G all the time,GPS offbrightness-2bars

At the end of the day only 20-30% will be remaining with light-moderate use


am i missing something?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Well, yesterday i've reflashed the phone with fresh PR 1.2 but nothing has change.

This is the actual configuration:
1) 3G always enabled
2) Internet connection on 3G with Skype and GTalk active
3) Foreca Widget (2 hrs refresh)
4) GMail IMAP (30 mins refresh)
5) 20 mins of phone call
6) 40 mins of bluetooth headphone connected.

Attached you can see the battery graph, i see that processor is still used all the time, despite the fact that from 10.30 to 13.30 i have all the time the screen locked.

Maybe i should try the undervolted kernel from Titan?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

my graph is never as flat as this! I have to recharge my phone every night as it's usually around 10-20% I had autodisconnect installed but found it sometimes would casue the phone to "get stuck" the 8" isn't long anough to connect on dual. my email is check every 30 mins thats two email accounts but I spend all of the day on 2g. would you peeps think a day is ok or should I be getting more?

My CPU is never erm flat or not shown when idle I always have the purple bit of noise at the bottom in battery graph, normal?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

what country do you live in??? unlimited 3 euro data plan???wow

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I did not reflashed the eMMC, but still got the improvement.

pfontana77: Try to keep your phone offline for a while and see how fast it discharges without 3g. If it still going as fast there could be some improvement to do..

Spotfist: As you can see, that noise is not necessity or a feature. I guess that thread author hasn't got it either.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

jorjino: I reflashed the MMC as well, after taking a backup. I read somewhere on the forum that it does help, so when I re-flashed I did the eMMC too.

Spotfist: Yes, pretty much all the things I did. I am still experimenting, with some things, my observation is that if you are seeing battery usage as close to 0% in Batterygraph, while idle you can have pretty amazing standby time. One other thing, I changed my SIM card earlier, before 1.2, the earlier one was scratched and did say "SIM not found" once in a while.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

That's where your problem lies. I removed all widgets, anything that keeps your busy while on standby will kill your battery. For example, I am seeing that the regular IMAP on Modest email client does worse than Nokia Messaging!

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Hildon-desktop (or Hildon-home?) is also one process that might be keeping processor busy all the time. Fix by reflash..

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Yes, this is a test to do, another test is to use 3G without internet connection active.

I take a look to top and i see that these process are responsible for the activity showed in my image:
1) hildon-desktop: 0.5 - 1.5, all the time
2) hildon-status-menu: 0.5 - 1.5, all the time
3) skyhost: 0.5 - 2 all the time
4) dbus-daemon --system --noforce: 0.5 - 1 all the time
5) gconfd : 0.5 - 1.8, less frequent but frequent.

I don't inserted in this list XOrg.

Shutting down the 3G Internet Connection with the chat, the process 3,5 disappear, the 4 reduced is activity.

Maybe this bug could be related?
https://bugs.maemo.org/show_bug.cgi?id=10412

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I removed all the widget from all the desktop, i only have apps shortcut.

Modest is connecting one time every 30 mins, i think that this is not the cause for the battery killing. See my previous post for a list of the process that are most active.

@Zimmer
I've done a fresh reflash yesterday of the PR 1.2

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I don't think that hildon-desktop is your problem, it is taking that 0,5-2 % on my phone too when looked from top.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Well, my next two step will
1) Powertop analysis
2) Undervolted kernel

I really don't have any other idea on how to manage this poor battery life, al least a solution that don't force me to be offline from 3G.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Undervolting is definitely worth it to try.

I made few tests with that 3g, it really is not that good network standard what comes to energy efficiency. If the data connection is on but passive (no data moving) battery will run out in appr. 15-18 hours. If I use the phone as a bluetooth modem and download at maximum rate (44-48 kt/s) all the time batt wont last any longer than 4-5 hours:rolleyes:

At least it seems possible for you to improve from that 5-7 hours.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

What has worked for me is enabling SMART REFLEX via the terminal commands.
I used to get 4-5hours with moderate to low use. Now i get 14+ hours with heavy to moderate use. Maybe an hours worth of phone calls and TONS of texts, Hundreds of emails(just enabled nokia messaging to see if that helps), about 30minuts of games, at least an hour of music.
Enabling smart reflex really helps with the idle time.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

did you enabled smart reflex on vdd1 and vdd2 ? or just on one of them?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Okay, I have been experimenting and I enabled smartreflex yesterday and this time Nokia N900 just lost about 1% battery idling with WiFi through the night (8-pm to 7 am), about 11 hours. Even more amazing! Not sure how it will affect my use time, but standby is wow!

Here's what I did in the shell:
root
echo 1 > /sys/power/sr_vdd1_autocomp
echo 1 > /sys/power/sr_vdd2_autocomp

PS: See the break in the batteryeye graph, strange aye? That's when I enabled smartreflex :-)

Re: Battery Life just got Amazing. 4 Days of Standby!
 

man, i can never get 1% power drain overnight. i typically get about 5-8% of drain overnight.

btw the bug with hildon-desktop consuming high CPU is typically triggered when you go in and out of the application list via the task manager at the top left corner. do it a few rounds and it immediately triggers the high CPU usage. i avoid this problem by putting shortcuts on my desktop.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

why isn't smartreflex enabled by default?!

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I enabled smartreflex on both vdd1 and vdd2. I read somewhere if you enable them the reverse order, your suppose to more battery life, but i didnt find that to be so.

One of the reasons why Nokia didnt activate it by default is because it sometimes makes the N900 unstable. By unstable I mean it results in frequent resets. In my experience, my N900 works perfect.

Battery life for a device is pinnacle to its usage and success. I dont think much attention is directed toward that field, but it should. I wish i knew more terminal commands in reference to SMART REFLEX.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Sorry, I'm a bit new to this, but what is smartreflex? Is it a program? How does it work?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

http://processors.wiki.ti.com/index.php/SmartReflex

it's basically a feature of the OMAP chips of which one is on our N900. it does power management.

it's not a program. think of it as a toggle switch on the chip. you enable it by sending some data to the chip which you can do very easily in linux (linux has a very interesting way of interfacing with this via a filesystem-like interface unlike windows).

Re: Battery Life just got Amazing. 4 Days of Standby!
 

hey all just letting you know that smartreflex is included in the qcpufreq app which allows for overclocking as well with an easy to use gui

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I typed "/sys/power/sr_vdd1_autocomp" in X Terminal but get a Permission denied message

Can you please explain how to do this, and how do I know it's working or not?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

sudo gainroot
echo 1 > /sys/power/sr_vdd1_autocomp
echo 1 > /sys/power/sr_vdd2_autocomp

That will enable Smart Reflex

To check:

cat /sys/power/sr_vdd1_autocomp

If it enabled you will see: 1
If it is not you will see: 0

Re: Battery Life just got Amazing. 4 Days of Standby!
 

I have a standby similar to yours, but the online time you claim to have for several hours (even if you are only online without doing anything) is what I find difficult to believe. That is why I ask you to give us a screenshot from batterygraph, but the first curve before you enabled smartreflex is not as flat as it should be to achieve more than 24hrs of online time, and again, that is what you claim to have.

My batterygraph shows "a very more flat curve than yours" and my N900 don't achieve more than 24hrs even of intermediate usage. The maximum I can achieve is 17hrs of intermediate usage, with 2 or 3 hours of online time and light IM over wifi, like 1hr of browsing time full over wifi, and some web checking during the day over wifi/2.5G, a few calls like 1hr tops, 5 pictures tops, some note taking, some spreadsheet, some appointments managing, like 50 sms tops, and very little music playing. With all that, 17hrs is like heaven to me.

PD: I have the titan's custom kernel with the Starving setting and smartreflex enabled on VDD1 only because enabling it for VDD2 is unstable for me.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Well said man.....i also thought how he got that much standby with a grap like that......:eek:

btw ur standby also luks awesome(17hrs)...can u brief ur settings???
i get only 12-13 hrs with light usage

that graph luks like it'll give a standby of max 12 hrs if it went like that all the way

@Power--care 2 xplain????we are confused

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Dude ur grap dropped by 30-35% within 7-8hrs:eek:

how come u got that long standby time which u were talking about with a graph like that?????:mad:

Re: Battery Life just got Amazing. 4 Days of Standby!
 

s33 & JorgeFX: see from 20:00 hrs to 7:00 hrs, that's when it was on standby (with WiFi), on my desk, connected to wifi, no widgets with only Nokia Messaging on checking for mails, LED off.

The massive drop of 30-35% from 13:00 hrs to 19:00 hrs is when I was driving with sygic on, on a few calls, music playing and some camera stuff, and connected all the time via 2G (no autodisconnect). Remember, I am just talking idle time here, not usage time.

Oh and in the night I did wake up couple of time(s) to check :)

I don't have any custom kernel yet. So, that will be the next step.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

ok...now that makes a little sense...:o

But even that 30-35% drop in under 7hrs is too much considering your previous posts of standby....what do you think?

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Thanks, it's enabled now :D

Re: Battery Life just got Amazing. 4 Days of Standby!
 

s3: Yup. I think the GPS + Sygic combo kills the battery pretty pretty fast, also I had the backlight enabled all the time. It's mostly got to do with CPU usage, when it's idling the CPU is usually near to 0%. Now, if we could get the CPU to just keep it's lower (maybe the 'titan' kernel).

To be honest, I don't understand the battery usage pattern of the 900 myself. I usually find it performs better once it drops a few percentage points. Like for example, it would drop from 95-85% pretty fast.

PS: Just discovered, the second smartreflex command (echo 1 > /sys/power/sr_vdd2_autocomp) does not work with PR 1.2, it still remains at 0, even if you enable it.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Like I said, I have the titan's custom kernel with the Starving setting and smartreflex enabled on VDD1 only because enabling it for VDD2 is unstable for me.

Also I have the POWERSAFE_BIAS from Titan Kernel enabled on 25. That helps me to keep the CPU on a very low range of MHZ.

By the way, I have the 125MHZ speed enabled and reniced the background tasks, and the ignore_nice_load value set to 1.

I think that is everything, but it took me several weeks to find out settings that give me more than 12hrs of intermediate usage.

Re: Battery Life just got Amazing. 4 Days of Standby!
 

That's why I was surprised because my battery life on intermediate usage is more acceptable than yours and even with that you have better battery life???? I'm gonna kill myself!! hahaha joke:D

Re: Battery Life just got Amazing. 4 Days of Standby!
 

The GPS is a battery killer on the N900, only 1hr can take away 20% easily. I don't use GPS on my N900, besides, the maps from Venezuela are like a draw from a 4yr old boy, I mean ONLY 2 LINES WHERE THERE ARE LIKE 20 ROADS!!!:mad: but that is another story...

My N900 drops from 97% to 85% pretty fast too, but also stays on 0% for 1hr almost.:confused:

They disabled it because of the unstable issues. If you use titan's custom kernel you can enabled it but, again, it is unstable. In fact, I think that everyone here that says they have smartreflex enabled on VDD2 without problem haven't find out that it is not enabled like you find out:rolleyes:

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Wow...some of these settings are new to me....will try it any ways and let u kno.....and thanks by the way

Re: Battery Life just got Amazing. 4 Days of Standby!
 

Well with all the features enabled that I bought the N900 for (3G, GPS, Location awareness, WiFi, Laptop replacement, microB full sized browsing) I never got more than 6 Hrs.
Here's Proof.

I do not think that would make me hate my N900, but with just an additional investment of $8, i.e. a spare battery, things are plenty under control, as seen in Day 2 chart, where the capacity suddenly jumps to 100% near the end of chart.

Well nokia can bundle an addition BL-5J with N900, but I am sure the 'corporate' will never budge on this one :)