Develop Bugs

[Q] Undervolting

I have installed a light version of Revolution HD rom and am not overclocking past defaults.
I do however want to undervolt. ATM ive set screen off profile to max out at 600 - what can i do do undervolt?
Can i keep the rom but flash a different kernel? If so, which one?

The kernal that rom uses is already undervolted, so you dont really need to unless you want to try and squeeze it as absolutely low as your handset will allow.

i see - where do i find the exact details of this?

This is the thread for the kernal that Revolution HD uses.
http://forum.xda-developers.com/showthread.php?t=835608

thanks, but from what i understand the kernel isnt undervolted - its unvolted...

Hmm, i was under the impression that lower freqs were undervolted and as it approaches 1.2Ghz the voltage approaches the highest value of stock voltage.

even if this was so - i would see no benefit as i use stock max clocks

ICS kernel with conservative governor.

Are there any ICS kernels that have the conservative governor included? Battery life is a big issue for me on AOKP and CM9, which prevents me from using them as a daily driver.
At the same time, I love them for being so slick and having the Bluetooth audio issues fixed.
Any help is appreciated.

Sunsparc said:
Are there any ICS kernels that have the conservative governor included? Battery life is a big issue for me on AOKP and CM9, which prevents me from using them as a daily driver.
At the same time, I love them for being so slick and having the Bluetooth audio issues fixed.
Any help is appreciated.
Click to expand...
Click to collapse
No, because there are no custom kernels yet that are compatible with ICS.

I think we can fix that one without the custom repacked kernel.
Do you know which governors being used for AOKP and what CPU frequencies?
What I'm thinking about is, we could take the cpu tweaks on my thread http://forum.xda-developers.com/showthread.php?t=1625299, http://forum.xda-developers.com/showthread.php?t=1610741 (all_in_here.zip, there are two cpu tweak files) and make the modification to fit to AOKP.
Currently on these tweak, I'm using 'ondemand' governor as default because conservative governor is not supported on ICS stock kernel yet. By changing the values on ondemand governor, we may get the same result.
(with some other tweaks, I'm getting 24hours now with 50% battery still left on Stock rom/kernel)

kobridge said:
I think we can fix that one without the custom repacked kernel.
Do you know which governors being used for AOKP and what CPU frequencies?
What I'm thinking about is, we could take the cpu tweaks on my thread , (all_in_here.zip, there are two cpu tweak files) and make the modification to fit to AOKP.
Currently on these tweak, I'm using 'ondemand' governor as default because conservative governor is not supported on ICS stock kernel yet. By changing the values on ondemand governor, we may get the same result.
(with some other tweaks, I'm getting 24hours now with 50% battery still left on Stock rom/kernel)
Click to expand...
Click to collapse
That's actually phenomenal. I'm at 46% after 6 1/2 hours.

[Q] Overclocking GPU?

Hi,
Sorry if this has been posted before but I can't find an answer to this question
I am currently running AOKP and trinity kernel, 1344mhz (cpu) and 499mhz (gpu). After installing the kernel, I manually went into ROM control, and increased the CPU to 1344mhz - set on boot. That was the CPU overclocked
However, I can't figure out how to overclock the GPU? I have run a benchmark, and it seems to still be at stock, and not 499mhz - how do I set it to the 499mhz that the kernel allows?
Thanks

3473 said:
Hi,
Sorry if this has been posted before but I can't find an answer to this question
I am currently running AOKP and trinity kernel, 1344mhz (cpu) and 499mhz (gpu). After installing the kernel, I manually went into ROM control, and increased the CPU to 1344mhz - set on boot. That was the CPU overclocked
However, I can't figure out how to overclock the GPU? I have run a benchmark, and it seems to still be at stock, and not 499mhz - how do I set it to the 499mhz that the kernel allows?
Thanks
Click to expand...
Click to collapse
There is a command that you can run from terminal on your phone but I can't think of it right now. Also, a bit of searching seems that there is an app. I haven't tested to see if it works, but it says it OCs the CPU AND GPU. Look for Overclocking(GPU + CPU) in google.

pastert33 said:
There is a command that you can run from terminal on your phone but I can't think of it right now. Also, a bit of searching seems that there is an app. I haven't tested to see if it works, but it says it OCs the CPU AND GPU. Look for Overclocking(GPU + CPU) in google.
Click to expand...
Click to collapse
That one apparently doesn't work.. have also tried Antutu CPU Master pro but it doesn't support GPU overclocking on the Galaxy Nexus...

Afaik, gpu oc is only available, if built-in the kernel. Userland controlled gpu oc must be supported by the kernel first, thats probably why antutu pro master or any other app still can't do it.
sent from my i9250

[Q] how to use 180mhz leankernel?

Hi new around here. Been trying out the lean kernel after other kernels seem to SoD on me. However I see lean kernel has a 180mhz experimental version so I flashed it and checked out CPU spy it doesn't seem like it uses that MHz. Do I have to do something else to enable it? Do I have to down load trickster mod to under clock it or something or is the kernel supposed to use it automatically ?

adpek said:
Hi new around here. Been trying out the lean kernel after other kernels seem to SoD on me. However I see lean kernel has a 180mhz experimental version so I flashed it and checked out CPU spy it doesn't seem like it uses that MHz. Do I have to do something else to enable it? Do I have to down load trickster mod to under clock it or something or is the kernel supposed to use it automatically ?
Click to expand...
Click to collapse
Yes, if I'm correct the default MIN for leankernel was 350mhz. Use trickstermod and set CPU min to 180mhz. Make sure to set cpu settings on BOOT there should be a check box on trickstermod for that option

[Noob Guide] What is and How to Undervolt

Hello, i wanna share my experience undervolting.
For people who dont know what undervolting is, its the power or energy that the battery send to the CPU with determinate clock speed.
For example:
384 Mhz is the lowest frequency of our CPU, it has a 800mv volt in the stock ROM with stock kernel.
So in theory, the battery send 800mv to the CPU when it runs at 384 Mhz.
The effect of undervolt the CPU is bassically get more battery life and at the same time reduce the temperature of the phone.Less energy send less battery used and less hot phone in our hands.
How to Undervolt
Im running Stock ROM with Ruby Kernel stable.
For undervolt you need a kernel that support it, you can do it in all rom if the kernel support that.
If you want to Undervolt, i recommend you to use Trickster MOD.
You can Undervolt maybe -50mv all frequencies and see how it goes. Some people can even in best cases undervolt -200 mv. But you need patience to test slowly.
DONT TICK SET AT BOOT IF NOT TESTED.
That why you cant:
For example if you undervolt -100mv and if not stable, and you have set at boot ticked, it will freeze the screen and after reboot it will happen again.
After you set the mv for undervolt, download from play store CPU stability test and run it.
It will test all CPU frequencies to see if it is stable.
If you dont get any SoD, congratulations its stable.
My undervolt settings are -100 or in some cases -75 mv and very stable. My battery temp is 30 C°.

Thank you very much
Sent from my LG-E975 using XDA Premium 4 mobile app

What is needed to undervolt?

Thanks for the info. What are your battery stats after undervolting? How does it suffer other operations of our mobile like browsing or gaming etc ?
Sent from my LG-E975 using xda app-developers app

You need to first make a backup, install a custom kernel, install trickster mod, and from there apply what this discussion is talking about. Good luck!
Sent from my Nexus 5 using xda app-developers app

lfuentes said:
What is needed to undervolt?
Click to expand...
Click to collapse
Bootloader unlocked with freegee and some kernel for your rom that supports undervolt.

nch26 said:
Bootloader unlocked with freegee and some kernel for your rom that supports undervolt.
Click to expand...
Click to collapse
And after that? Some specific app?

lfuentes said:
Some specific app?
Click to expand...
Click to collapse
Depends on the kernel. I am using Trickster Mod with Viper ZVC kernel. There are other control apps available -- some of them are kernel-specific, some are more universal (Kernel Tuner, Android Tuner, System Tuner, etc.). Look in your kernel's thread -- the developer usually tells which control app(s) to use with it.

nch26 said:
Hello, i wanna share my experience undervolting.
For people who dont know what undervolting is, its the power or energy that the battery send to the CPU with determinate clock speed.
For example:
384 Mhz is the lowest frequency of our CPU, it has a 800mv volt in the stock ROM with stock kernel.
So in theory, the battery send 800mv to the CPU when it runs at 384 Mhz.
The effect of undervolt the CPU is bassically get more battery life and at the same time reduce the temperature of the phone.Less energy send less battery used and less hot phone in our hands.
How to Undervolt
Im running Stock ROM with Ruby Kernel stable.
For undervolt you need a kernel that support it, you can do it in all rom if the kernel support that.
If you want to Undervolt, i recommend you to use Trickster MOD.
You can Undervolt maybe -50mv all frequencies and see how it goes. Some people can even in best cases undervolt -200 mv. But you need patience to test slowly.
DONT TICK SET AT BOOT IF NOT TESTED.
That why you cant:
For example if you undervolt -100mv and if not stable, and you have set at boot ticked, it will freeze the screen and after reboot it will happen again.
After you set the mv for undervolt, download from play store CPU stability test and run it.
It will test all CPU frequencies to see if it is stable.
If you dont get any SoD, congratulations its stable.
My undervolt settings are -100 or in some cases -75 mv and very stable. My battery temp is 30 C°.
Click to expand...
Click to collapse
Thank you, I'm using AK kernel with UKM and Synapse app from google playstore. Using E-975 (intl.). Can you suggest if I should change the global setting or the individual settings for frequencies ? I had recently (soft) bricked my phone by running benchmark at ~1900mhz CPU and 487mhz GPU (like a villain, I know. Re-connected battery to save it... phew..). I'm really cautious now and I just want it to be less hot and save some battery, that's all. Any guidance would be really appreciated... thanks

Claureid said:
Thank you, I'm using AK kernel with UKM and Synapse app from google playstore. Using E-975 (intl.). Can you suggest if I should change the global setting or the individual settings for frequencies ? I had recently (soft) bricked my phone by running benchmark at ~1900mhz CPU and 487mhz GPU (like a villain, I know. Re-connected battery to save it... phew..). I'm really cautious now and I just want it to be less hot and save some battery, that's all. Any guidance would be really appreciated... thanks
Click to expand...
Click to collapse
I dont have anymore this phone because some people stole my phone like 1 year ago. Sorry.

Oh okay, sad loss....