Develop Bugs

Best kernel for battery life with Fresh 3.1.0.2?

I've never cared about battery life before because I'm typically near a charger however I'm going to the beach for a few days and will need my phone to last.
What's the best kernel/set up for me if I'm running Fresh 3.1.0.2? I don't care about performance, fps, mflops, etc for these few days as long as the battery lasts and the phone is stable. I have setcpu on my phone but don't really know how to use it.
Sent from my PC36100 using XDA App

The latest cfs kernels are supposed to focus more on battery life than performance. Do you underclock cuz that's a big help too.
Sent from my FROYO'D EVO using xda app

At 998 max now, where should I be? Which cfs one?
Sent from my PC36100 using XDA App

I'm running Fresh and Netarchy's 4.1.8 kernel.Creating a set CPU profile for when the phones screen is off will increase your battery life quite a bit.My screen off profile has the CPU max at 245 ghz and the min at 128.You can also scale back your max from 998 mhz to around 500 mhz and save battery without your phone being so slow that its really noticeable during normal use.
Sent from my PC36100 using XDA App

BrianBusby2038 said:
I'm running Fresh and Netarchy's 4.1.8 kernel.Creating a set CPU profile for when the phones screen is off will increase your battery life quite a bit.My screen off profile has the CPU max at 245 ghz and the min at 128.You can also scale back your max from 998 mhz to around 500 mhz and save battery without your phone being so slow that its really noticeable during normal use.
Sent from my PC36100 using XDA App
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Interesting. What kind of battery life do you get? I thought I read a while back that going below 245 was a bad idea. Guess not?

sdc177 said:
Interesting. What kind of battery life do you get? I thought I read a while back that going below 245 was a bad idea. Guess not?
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It's more stable with the newest kernels. I'm set at 245 min and max when the screen is off and I usually see a 1% loss every couple hours but I haven't paid a lot of attention to it lately cuz like you, I'm usually near a charger. Battery life while using the phone still isn't great but I kind of expect that from a phone like this. There are some good battery conditioning tutorials in the forum that help quite a bit too.
Sent from my FROYO'D EVO using xda app

Here's my usage for the last week.I go off charger at around 7am and usually have about 70% charge remaining when I get home at 5.
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Set CPU

I am Running 2.3,
What profiles should i use? this look alright?
And is it really worth using?
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i like the screen off profile, as that makes a real difference for me in battery life, however i see no point in having battery profiles. do you really want your phone to become slower just because you drop under 50% batt?
normally i would want it to keep going full speed and in the case that im on the road and need to save battery as much as possible i would change the setcpu profile myself (and probably switch off sync and 3g)

Your <30% profile will never kick in, since that is also <50% which has a higher priority.

Newb question: Does one have to have a rooted phone to install Set CPU?

^^^ Yes.
SetCPU needs superuser privileges to do its thing.

Priorities fixed now, I used it with less than 50% and the phone was just as fast doing regular tasks and web browsing

Am just using screen off dont need to use any other settings.

Borat38 said:
Newb question: Does one have to have a rooted phone to install Set CPU?
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You also need a custom kernel, the htc one can only underclock not overclock
Sent from my HTC Desire using Tapatalk

I just use <30% battery, 768Mhz. I let HAVS do all the rest.

So because I have a custom Rom Leedroid, I dont need to disable the driver?
AndroHero said:
You also need a custom kernel, the htc one can only underclock not overclock
Sent from my HTC Desire using Tapatalk
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Kalavere said:
I just use <30% battery, 768Mhz. I let HAVS do all the rest.
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What is HAVS?
Also, what's better for batt conservation (w/out sacrificing speed): Undervolting or underclocking?

Borat38 said:
What is HAVS?
Also, what's better for batt conservation (w/out sacrificing speed): Undervolting or underclocking?
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HAVS is a set of instructions from the kernel governing the CPU, it undervolts and under clocks the CPU when it is not in use. Undervolting and underclocking go hand in hand.

I have just 1 profile:
screen off: max around 384 MHz. and mim 245 MHz.
Does that makes sense? :-O

SetCPU profiles?

Hello all... I'm new to Setcpu and have been able figure out how to OC and UV while still keeping everything relatively stable. As of now I'm experimenting with making profiles, I was wondering if someone could post a screen shoot of their profiles and pass on any advice. I am running TNZ Blend 2.6.2 with the Hitman kernel. Here's a screen shot of what I have so far.
T.I.A.
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Sent from my SPH-D710 using xda premium

The only thing I would comment on is your "screen off" there is no reason for it to be scaling/jumping from 800-1200 "ondemand" while the phone is not being used or the screen is off in general, just have 800 low and high or have 800 as your high and set it to "performance" so that there is no polling being done and it will set itself to the high value which would still be 800 anyway.
You might have a reason for that setting, just trying to save you a little bit more of battery juice.

Definitely bring down that screen off! I have mine set to 200-500 ondemand. I'm sure it'll save you a lot of battery. Also the battery 100% is kinda pointless because that's what the main profile is for. And expect your phone to get extremely hot if you use it while charging since you have it overclocked. I did that same mistake now I keep it at 200-800 to avoid the over heating.
Sent from my SPH-D710 using XDA App

Thanks guys
Sent from my SPH-D710 using xda premium

Just a recommendation...you should give tegrak a go. I find it to be much more beneficial than setcpu...

Why scale cpu depending on the battery level? I prefer scaling CPU on my phone by the temperature. 1.6Ghz normal usage and then gradually scale it down if it gets too hot. I bought this phone for its performance, not battery life, which actually is pretty amazing for such powerful device.

1brainsurgeon said:
Just a recommendation...you should give tegrak a go. I find it to be much more beneficial than setcpu...
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be careful with Tegrak, as it doesn't work with some of the non stock kernels, and will freeze your phone for sure..

Pretty good. You don't need the battery>100% profile. Adjust that from the main page.

wase4711 said:
be careful with Tegrak, as it doesn't work with some of the non stock kernels, and will freeze your phone for sure..
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Yikes! I wasn't aware of that. Guess I'll do a bit more research on that before I fire out recommendations. Note to self...not all devices have the same setup as yours

Slow/Laggy CM9 Nightly Fix!

I'm not sure if anyone else was experiencing lag from the new CM9 Nightly like I was after I flashed it.. So I played around with the options and noticed that the CPU governor under "Performance" was set to "Interactive". I switched this to "On Demand" & checked "Set on Boot" and man this phone flies now! Also make sure that the min and max speeds are set correctly.
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I dunno, maybe your battery life is going to suck now lol. Let us know how the drain is. If I weren't at work right now I'd be playing with the latest nightly myself.

CM9 is Great! Flashing LU6200 and used X2.

You have succesfully flashed CM9 on LU6200 ?

zhzben said:
CM9 is Great! Flashing LU6200 and used X2.
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wrote us how u did that! please!

Malnilion said:
I dunno, maybe your battery life is going to suck now lol. Let us know how the drain is. If I weren't at work right now I'd be playing with the latest nightly myself.
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On demand governor draining more battery then interactive one?

Much snappier for me too. Can't report on how it affects battery life yet. With this phone and the newness of the ROM, definitely keep your charger handy.

thank you, I made these changes.
I did a bit of the google to try and find the difference between interactive and on-demand, the nomenclature sure seems similar, but could not find any descriptions of the 2, anybody know?

http://wiki.rootzwiki.com/CPU_Governors
Ondemand
Quickly scales up the CPU frequency once there is sufficient load, and then quickly scales down the frequency once the load is no longer present.
* Pro: Good performance, decent battery life.
* Con: CPU frequency can constantly shoot up and down, causing more power drain than staying at an "ideal" frequency.
Interactive
Quickly ramps up to the maximum allowed frequency, then slowly drops the frequency once no longer under load.
* Pro: Faster to ramp up and down means a snappier response from the device.
* Con: CPU will run quickly for a few moments after it is no longer needed to do so, resulting in longer periods of higher power consumption and heat generation.

I don't notice a major difference in battery drain yet. Still mediocre. But I am willing to sacrifice some life for the absence of lag. I almost reverted back to gingerbread before discovering this minor change fix lol.

Thanks Namuna

THANK YOU VERY MUCH FOR THIS
actually i have a much better battery right now and an almost lag free phone !

I do not recommend enabling KSM as posted above. I found out that ksmd process utilizes cpu by 3-5% for hours!!! It drain battery on my eyes!

FlintPNZ said:
I do not recommend enabling KSM as posted above. I found out that ksmd process utilizes cpu by 3-5% for hours!!! It drain battery on my eyes!
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Thanks! OP edited. The important change is the CPU governor.

bioan said:
You have succesfully flashed CM9 on LU6200 ?
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Currently can not

need help in undervolting for battery life (franco kernel)

Can anyone please give me undervolting tips for battery life cause I can't get to 3 hrs on screen time with standard battery
I am with latest Franco kernel
I don't think the problem from the ROM cause its the same on every ROM I tried
Thnx for any help

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These are the voltage settings I'm using for the CPU, ondemand governor with standard battery. Hope this helps.
Sent from my Galaxy Nexus

Undervolting tip: Undervolting varies per phone and requires trial and error. If your phone hotboots, you went too low.

Cilraaz said:
Undervolting tip: Undervolting varies per phone and requires trial and error. If your phone hotboots, you went too low.
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Agreed!
I started by letting SmartReflex calibrate the voltages and using those voltages as my starting point. Undervolt by 20-25 at first and see how stable it is...trial and error! Here is a screenshot of my SmartReflex calibrated voltages, but they are different for every phone and sometimes get calibrated differently for me when using various ROM/kernel combinations. I am currently running the Kang CM10 ROM with the Glados kernel, but have used Franco in the past with similar results.
Sent from my Galaxy Nexus

ibenjakinov said:
Agreed!
I started by letting SmartReflex calibrate the voltages and using those voltages as my starting point. Undervolt by 20-25 at first and see how stable it is...trial and error! Here is a screenshot of my SmartReflex calibrated voltages, but they are different for every phone and sometimes get calibrated differently for me when using various ROM/kernel combinations. I am currently running the Kang CM10 ROM with the Glados kernel, but have used Franco in the past with similar results.
Sent from my Galaxy Nexus
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Could I know the apps name of your screen cap?