Root [MOD][.ZIP]Lower Voltages on AOSP Kernels

[frenchy714]

I take no credit for this mod. -Frenchy714

What does this do?

This mod will help to increase your battery life by lessening the draw of power the CPU can use. With HAVS, there is a voltage range that a certain CPU speed will use. These scripts lower both the MIN and MAX voltage at each speed, even if your kernel is already undervolted.

Kernel developers make their kernels to be "universal". By universal, they want the kernel to work on as many phones as possible so they mildly undervolt. However, some phones can handle a more aggressive undervolt. Some can't. These scripts will help you see if your phone can be undervolted more for better battery life.

The -25mV and -50mV undervolts should work for almost anyone. The -75mV and -100mV are pretty agressive and might not work on your phone. If you get reboots or freezing, try the .zip that is 1 step down and see if it is more stable.

If you would like to learn more or try, click here.

To those of you who try this out, please make sure you post your results and experiences. Thanks.

 

[frenchy714]

Just giving this a bump because I've been running this script since its' beginning w/ stellar results and this Dev's really on to something. I've lowered all my voltages by 100 mV, on top of using a havs kernel w/o issue, and recently achieved 3 days, 10 hours, and 41 min. w/ 10% remaining, on one charge (a lot of idling was involved, but it's still insane battery life nonetheless). I suggest you guys give it a check out if you haven't already.

[MOD]viperMOD for AOSP Kernels - v3 beta RC2.11 |Updated 5.28.11|

 

[youdoofus]

Holy ::insert colorful expletive here:: are you serious? Any downsides that you've noticed?

 

[frenchy714]

Holy ::insert colorful expletive here:: are you serious? Any downsides that you've noticed?

None. Give the thread a good read and give em a try.

 

[SaleenFiend]

Just giving this a bump because I've been running this script since its' beginning w/ stellar results and this Dev's really on to something. I've lowered all my voltages by 100 mV, on top of using a havs kernel w/o issue, and recently achieved 3 days, 10 hours, and 41 min. w/ 10% remaining, on one charge (a lot of idling was involved, but it's still insane battery life nonetheless). I suggest you guys give it a check out if you haven't already.

[MOD]viperMOD for AOSP Kernels - v3 beta RC2.11 |Updated 5.28.11|

None. Give the thread a good read and give em a try.

Yea, but aren't you running a max speed of 768? I keep mine at 1152 so I can imagine my battery life would be almost cut in half assuming I use the same setup and up/down time.

 

[SaleenFiend]

Also, I kinda sifted the XDA thread... but, too much info. Does this cause any performance slow downs/lags? I want to increase battery life but not sacrifice performance.. .haha That's funny stuff isn't it?

 

[evomattnc]

Also, I kinda sifted the XDA thread... but, too much info. Does this cause any performance slow downs/lags? I want to increase battery life but not sacrifice performance.. .haha That's funny stuff isn't it?

No just instability if it's to low. It only controls voltage supplied.

 

[SaleenFiend]

No just instability if it's to low. It only controls voltage supplied.

Thanks, will flash now.

 

[frenchy714]

Yea, but aren't you running a max speed of 768? I keep mine at 1152 so I can imagine my battery life would be almost cut in half assuming I use the same setup and up/down time.

When I was running a Sense based ROM, I had my cpu overclocked to 1152 as well, but since using AOSP, my phone literally feels snappier than it ever was on Sense, running it on 768. So I feel no need to set it back to 1152.

I also use to get similar battery life running my cpu to 1152 while on Sense in the past.

 

[SaleenFiend]

When I was running a Sense based ROM, I had my cpu overclocked to 1152 as well, but since using AOSP, my phone literally feels snappier than it ever was on Sense, running it on 768. So I feel no need to set it back to 1152.

I also use to get similar battery life running my cpu to 1152 while on Sense in the past.

Flashed. I'll let you know what I think. Also, went with Tiamat (4.04?) from CM7 stock kernel. So far (15mins), I don't notice anything different. Battery life will be tested by tomorrow evening.


EDIT: I wanted to add, I did verify the voltage change after the flash/run(-50mv)

 

[frenchy714]

Flashed. I'll let you know what I think. Also, went with Tiamat (4.04?) from CM7 stock kernel. So far (15mins), I don't notice anything different. Battery life will be tested by tomorrow evening.


EDIT: I wanted to add, I did verify the voltage change after the flash/run(-50mv)

Definitely post any differences in performance/battery, if any. You probably could have flashed -75 mV w/o issue. I'm running -100 mV.

 

[SaleenFiend]

Definitely post any differences in performance/battery, if any. You probably could have flashed -75 mV w/o issue. I'm running -100 mV.

I'll get testy eventually... lol