Root Low Voltage Kernal by ejhart

[Roadhog]

Get it here.
[Kernel] Stock speeds undervolt. [update] - xda-developers

I am using it and my phone seems to run much much cooler. Haven't really tested battery life yet, but it seems better.

 

[Tony N.]

Just installed and ran radiant (the game). works great. hoping for better battery life.

 

[jasonb1985]

did a nandroid backup first then installed. never had a problem with heat or battery life, but if it helps i'll take it anyway.

the phone seems to run just as good and fast as before.

 

[bshockme]

Running this kernal with jagerrom 1.1. Very stable. Too soon to tell on how much battery life improvement there will be. Marginally less heat when using processor intensive apps for long periods. I believe most of the power saving will come when it is at the lower speed steps, so heat probably isn't a good indicator. I will give it a few days, and give my impression of battery improvement.

 

[Aaron1017]

Installed as well. Will reply in a couple days.

 

[Frenchy180]

Can I run this without installing a custom rom? If so, do I still need to wipe the data on my phone first?

 

[yojoe600]

yes u can and no u do not have to wipe

 

[patkicks10]

I wanted to test this for you guys, so i charged phone fully before i went to bed last nite and put this undervolt kernal on.. seems like its making battery last!
I also haven't noticed any deference on performance so thats good!

I will update this throughout the day!
Uptime:12.47
Awake:2.01

 

[yojoe600]

if anyone wants undervolt with overclock and N here is the new kernel
Hydra-kernel **UPDATE 6/25 - xda-developers

 

[iowabowtech]

if anyone wants undervolt with overclock and N here is the new kernel
Hydra-kernel **UPDATE 6/25 - xda-developers

Thinking about trying it. Sounds stable by all accounts.

 

[yojoe600]

i have no problems so far... and even overclocked the battery seems better... since my sleep profile is soo low in clock

 

[Tony N.]

Are people having trouble tethering with n-draft enabled?

 

[jasonb1985]

Are people having trouble tethering with n-draft enabled?

nope. no problems here. i am running the undervolted kernel with N and it's working.

 

[yojoe600]

nope

 

[pardonmyfreedom]

Some people (like me) are having issues with the N driver. Range and dropped connections seems to be issues. I haven't confirmed any tethering options. Use the Non-N undervolted kernel if you have issues with the N driver. Also, there is no overclocked kernel with non-N drivers.

 

[answerman]

Waiting for patkicks10 to update... I'm very interested in seeing how battery life is affected by undervolting. I'm pretty happy with my battery life, but for those who have issues with it and are willing to take a slight performance hit, this sounds like the answer.

 

[iowabowtech]

Well, I'm gonna find out about any battery savings because I'm running the undervolt now. Strictly undervolt, no wireless N.

BTW, are there any quality free options out there that compare to SetCPU?

 

[yojoe600]

Some people (like me) are having issues with the N driver. Range and dropped connections seems to be issues. I haven't confirmed any tethering options. Use the Non-N undervolted kernel if you have issues with the N driver. Also, there is no overclocked kernel with non-N drivers.

yes there are some over at XDA but they are in a big thread u jsut need to look for them. i still have one if someone wants it uploaded

 

[patkicks10]

Waiting for patkicks10 to update... I'm very interested in seeing how battery life is affected by undervolting. I'm pretty happy with my battery life, but for those who have issues with it and are willing to take a slight performance hit, this sounds like the answer.

Hey sorry it took me so long to update...
totally forgot.. i still haven't charged..

 

[answerman]

Very cool... as a fair comparison, how would your battery status have been after 19 hours on the stock kernel?

 

[Pacific]

Hey sorry it took me so long to update...
totally forgot.. i still haven't charged..

I'm not seeing a difference compared to my phone. What were you doing? If that's gameboid at 2xfastforward for two hours it would be great.

Edit: Someone needs a before and after with a system panel monitor active to record the cpu usage.
Here's me it's actually 49% on the HTC battery widget so...

 

[CheeseJam]

What are the downsides to a low voltage kernel? Why don't all phones run on "low voltage"?

 

[ejkeebler]

I'm not seeing a difference compared to my phone. What were you doing? If that's gameboid at 2xfastforward for two hours it would be great.

Edit: Someone needs a before and after with a system panel monitor active to record the cpu usage.
Here's me it's actually 49% on the HTC battery widget so...

it's crap like this, that makes me think i have a problem with my incredible, even on my best days i might get 3 hrs of awake time and 24 hours of Up and thats down to 10% range......sigh....i wish i was getting this kind of usage, my goodness....

**Edit**

PS. I'm using the seido 1750...

 

[patkicks10]

I'm not seeing a difference compared to my phone. What were you doing? If that's gameboid at 2xfastforward for two hours it would be great.

Edit: Someone needs a before and after with a system panel monitor active to record the cpu usage.
Here's me it's actually 49% on the HTC battery widget so...

I have been using phone/texting/some web browsing.. nothing to much

 

[Bearly]

Sorry if this is a stupid question, but this obviously requires root, right?

What's the easiest root method? I see a few methods but not sure which one is "non-dev" friendly.

I'd love to undervolt my CPU and return the extended battery so I can have the phone last greater than a day with moderate use.

Thanks.