maemo.org - Talk - Battery Life just got Amazing. 4 Days of Standby!

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

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!

Quote:

Originally Posted by JorgeFX (Post 751000)

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

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!

Quote:

Originally Posted by Power (Post 751029)

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

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!

Quote:

Originally Posted by H3llb0und (Post 751078)

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?

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!

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 :-)

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!

Quote:

Originally Posted by JorgeFX (Post 751084)

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 from batterygraph, but the first curve wifi/2.5G, a few calls like 1hr tops, 5 pictures tops, some note taking, some spreadsheet, some appointments managing, like 50 sms, and very little music playing. With all that, 17hrs is like heaven to me.

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