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-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   Battery Life just got Amazing. 4 Days of Standby! (https://talk.maemo.org/showthread.php?t=58283)

s33 2010-07-14 04:35
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by Power (Post 751029)
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 :-)
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:

Power 2010-07-14 04:50
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.

s33 2010-07-14 04:56
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by Power (Post 751095)
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.
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?

H3llb0und 2010-07-14 04:59
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by shazzy84 (Post 751081)
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
Thanks, it's enabled now :D

Power 2010-07-14 05:13
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.

JorgeFX 2010-07-14 05:29
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by s33 (Post 751085)
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
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.

JorgeFX 2010-07-14 05:31
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by Power (Post 751095)
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.
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

JorgeFX 2010-07-14 05:41
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by Power (Post 751113)
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).
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...

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

Quote:
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.
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:

s33 2010-07-14 05:44
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by JorgeFX (Post 751120)
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.
Wow...some of these settings are new to me....will try it any ways and let u kno.....and thanks by the way

noipv4 2010-07-14 05:45
Re: Battery Life just got Amazing. 4 Days of Standby!
 
2 Attachment(s)
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 :)


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