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[Q] Kernel suggestion for underclock

I am running Cognition 4.4.8, which will not allow OC/UC. I actually just want to UC. What recommendation would you have for a kernel compatible with Cognition 4.4.8 for Captivate that would allow me to UC?

Don't you mean oc/uv? I don't think you know what you are talking about.

Yeah its UV (undervolt). Find any kernel that allows it and is working with your ROM. Maybe ask in that thread as others could be using a custom kernel for that exact reason.
Sent from my SGH-I897 using XDA Premium App

UC is a real term, maybe he meant he wants to limit his clock speed to 800mhz. What's that called if not UC?
Although undervolting and underclocking to save battery is a waste of time. The cpu doesn't use that much battery in the first place, the screen and the modem use the most power, you want the charge to last switch to the lowest brighteness and 2g, that will give way more battery than uc/uv will.

studacris said:
UC is a real term, maybe he meant he wants to limit his clock speed to 800mhz. What's that called if not UC?
Although undervolting and underclocking to save battery is a waste of time. The cpu doesn't use that much battery in the first place, the screen and the modem use the most power, you want the charge to last switch to the lowest brighteness and 2g, that will give way more battery than uc/uv will.
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+1 on the battery topic. Even at a high OC the battery drain is not that much worse... a little yeah but not too severe.
Also good point about UC.. wasn't thinking about that at all ..underclock what!?!?

some people falsely think that the phone runs at 1ghz all the time, when in fact it downclocks itself and ramps up clockspeed when it needs it....so unless you have an app thats using 100% CPU all the time, your phone is running around 200mhz at idle.

Pirateghost said:
some people falsely think that the phone runs at 1ghz all the time, when in fact it downclocks itself and ramps up clockspeed when it needs it....so unless you have an app thats using 100% CPU all the time, your phone is running around 200mhz at idle.
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+1 again Although there are different governors that do different things most phone at stock will idle down to 200mhz. My phone for instance idles down to 800mhz, but thats just my prefrence

Yep, I meant OC/UV. I typed too fast for my own good!

Good points
Thanks for the message on how little battery undervolting saves. That was quite helpful. I did try the discussion board for Cognition, but no one seemed to be posting on using an alternate kernel, which is why I asked for recommendations here.

I believe Cog is KB1 based, so this kernel should work: http://forum.xda-developers.com/showthread.php?t=988805

Thanks I will certainly trie eXist's kernel.

Ernesto47 said:
Thanks I will certainly trie eXist's kernel.
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If you want the best battery life, I suggest something other than cognition. In my experience, i9000 based custom roms get better battery life.
Sent from my CM7 powered captivate

@sixstringsg I notice that you are using Cyanogenmod. I keep looking at that, but since it was still not listed as stable, I was not sure whether to try it. How are you finding the stability?

Overclocking questio.

Howdy folks. Could someone point me in the right direction? Thinking about overclocking but have not done it. What are the benefits / rewards?
Is there an app or program i can to do this?
And what is a safe range?
Thanks in advance!
Sent from my intergalactic space modulator using XDA App

Benefits : Faster phone, smoother ui
Cons: Phone may heat up if overclock is set too high
For this phone 1500 is the highest, safest number we can get to right now. I would suggest setCPU, which you can find on XDA for free. (search setCPU)

You'll need a new kernel first, the stock one doesn't support oc. Go with Faux's assuming you're running a rom compatible with it (and most are).
After that, download Pimp My CPU from the market and you're good to go.
Sent from my Nexus Prime using XDA Ultimate App

To be honest with you, I notice hardly, if any, real-world phone speed increase when I overclock...barring benchmark numbers. I'm not really sure why that's the case for me, and why for some others it's such an extremely obvious difference (or so they claim). Perhaps I'm not running the same cpu intensive apps that they run. But for general, day to day, running of my phone, it's just not worth it for me due to the battery cost.
So I would love to hear from some of you where "precisely" do you see such a marked improvement on the speed of your phone?

Well, first off, make sure you have a custom Recovery installed... Then find a ROM you'd like, and then, flash a custom OC Kernel..
You'll need an app such as SetCPU to control the overclock.

mmapcpro said:
To be honest with you, I notice hardly, if any, real-world phone speed increase when I overclock...barring benchmark numbers. I'm not really sure why that's the case for me, and why for some others it's such an extremely obvious difference (or so they claim). Perhaps I'm not running the same cpu intensive apps that they run. But for general, day to day, running of my phone, it's just not worth it for me due to the battery cost.
So I would love to hear from some of you where "precisely" do you see such a marked improvement on the speed of your phone?
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Are you using the stock launcher? It's alot smoother with the stock launcher if OCed to 1500, although i don't notice a difference from 800 to 1500 on launcher pro.

[Q] HTC Sensation 4G T-Mobile US Kernel above 1.5Ghz

Has anyone used any kernels for HTC Sensation 4g (TMO US) above 1.566Ghz?
I am currently using a ROM by Mike1986 and kernel witch took my phone to 1.566Ghz and i am loving it.
However, i am a big OC freak and i would like some pointers on any tested kernels above 1.566Ghz, preferably that work well with Mike1986's ROM as i find them to be most stable our of all i have tried (i have tried 3 different types).
Any input is highly appreciated and welcome. Thanks team.

dronepro said:
Has anyone used any kernels for HTC Sensation 4g (TMO US) above 1.566Ghz?
I am currently using a ROM by Mike1986 and kernel witch took my phone to 1.566Ghz and i am loving it.
However, i am a big OC freak and i would like some pointers on any tested kernels above 1.566Ghz, preferably that work well with Mike1986's ROM as i find them to be most stable our of all i have tried (i have tried 3 different types).
Any input is highly appreciated and welcome. Thanks team.
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http://forum.xda-developers.com/showthread.php?t=1256668
I honestly don't see the benefits except lower battery life and a warmer device, I doubt you'll notice the speed difference past like 1GHz. All of the higher freqs seem pretty much the same and aren't really worth the bother with, use a governor that accesses higher freqs quicker and you won't be needing high freqs.

Ace42 said:
http://forum.xda-developers.com/showthread.php?t=1256668
I honestly don't see the benefits except lower battery life and a warmer device, I doubt you'll notice the speed difference past like 1GHz. All of the higher freqs seem pretty much the same and aren't really worth the bother with, use a governor that accesses higher freqs quicker and you won't be needing high freqs.
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What governor would you suggest??? also, i know that when using you phone and maybe even playing games i wouldn't see much of a difference between the stock 1.2 Ghz vs 1.5 or 1.9Ghz but it's all about the bragging rights, lol. I like to go to my geeky friends and slappin’ a higher clock frequency than they have on their poor devices or silly I Phones. Also I have to tell you from my tests I do see Mike1986’s latest 3.6.7/4.1.7 Rom using much less battery life than stock Rom. I have noticed about a 10% improvement, maybe even more.
Also i do see a big improvement in Benchmarks. When i was using stock 1.2Ghz setting i was benchmarking much lower than the 1,5Ghz i am at now.
Thanks again for the input.

The benefit of custom ROMS and kernels, is that they are optimized to run well. Unless the chef sucks, most big name ROMS are optimized and more efficient.

I was running 1.2ghz for a while and whenever I'm playing Snes roms it would FC. After bumping it up to 1.72ghz it never did it again. Although 1.72ghz may be overkill for what I use my phone for but everything seems to be running extremely smooth.

dronepro said:
What governor would you suggest??? also, i know that when using you phone and maybe even playing games i wouldn't see much of a difference between the stock 1.2 Ghz vs 1.5 or 1.9Ghz but it's all about the bragging rights, lol. I like to go to my geeky friends and slappin’ a higher clock frequency than they have on their poor devices or silly I Phones. Also I have to tell you from my tests I do see Mike1986’s latest 3.6.7/4.1.7 Rom using much less battery life than stock Rom. I have noticed about a 10% improvement, maybe even more.
Also i do see a big improvement in Benchmarks. When i was using stock 1.2Ghz setting i was benchmarking much lower than the 1,5Ghz i am at now.
Thanks again for the input.
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I use conservative(810/192), super charger v6, ultra smooth rosie on 4.1.6. I haven't used benches, but they'll be low on this ROM since I'm assuming it's based on the Sense 3.5 leak for sensation.

Rickdaddy said:
I was running 1.2ghz for a while and whenever I'm playing Snes roms it would FC. After bumping it up to 1.72ghz it never did it again. Although 1.72ghz may be overkill for what I use my phone for but everything seems to be running extremely smooth.
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What Kernel is this? Can you provide a LINK?? thanks.

Thanks again to all for the imput.

CPU apps And underclocking - batter life?

I have a couple of question/advices I want to receive an answer for about CPU.
So I am struggling to get better battery life without hurting performance.
1) Can CPU apps hurt battery life by themselfs. I mean could only using an app not regarding the settings damage the battery life. Is it better to let the cpu work by itself and not any apps managing it?
2) Which is the best CPU control app?
3) Will Underclocking improve my battery life a lot and will it make performance worse. What are the best settings to keep battery life and performance optimized at the same time. If I want to play heavy games I will overclock for the time I play the game. But I don't want my cpu to be working at 1600ghz for instance when I am not doing gaming or similar heavy processes. What are the best settings to improve battery life but not hurt performance?

If you use an app like SetCPU, you can have profiles. I used to have it so that the phone would underclock when the battery reached a certain % or was too hot.
If you're S-Off and rooted, you can get way better battery life if you flash a new kernel. I'm using Faux v004, I've set SetCPU off and just let the kernel do its thing, and my battery life is at 1 day and almost 15 hours.
(I also play a lot of games and the Faux kernel is very resposnive. My games load much faster that they did on stock kernel)

Thanks! I am using this Kernel http://forum.xda-developers.com/showthread.php?t=1216197 and I find it good. I am rooted and used SetCPU in the past so I know all about profiles and etc. But my questions were. Do programs like SetCPU drain battery? And which best CPU program? And what about undervolting?

SsBloodY said:
Thanks! I am using this Kernel http://forum.xda-developers.com/showthread.php?t=1216197 and I find it good. I am rooted and used SetCPU in the past so I know all about profiles and etc. But my questions were. Do programs like SetCPU drain battery? And which best CPU program? And what about undervolting?
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Apps like that don't really have any more of a drain than checking your email or receiving a text. If using Faux Kernel, there's an app out there designed for it that helps with clocking and undervolting it, made by the man himself. If not, AnTuTu has one on the market, I think.

sshede said:
Apps like that don't really have any more of a drain than checking your email or receiving a text. If using Faux Kernel, there's an app out there designed for it that helps with clocking and undervolting it, made by the man himself. If not, AnTuTu has one on the market, I think.
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Fauxclock hasn't been updated in ages and it's by Romanbb, not faux, afaik.
As for the OP's questions:
1. Not really. I haven't noticed any extra battery drain with CPU apps so it's probably not significant.
2. I don't think there's a 'best' CPU app. I used to use SystemTuner, which worked fine for me, but I switched to SetCPU because I wanted to underclock the intellidemand governor on faux's latest beta.
3. Underclocking will lead to some improvement in battery life. As for undervolting, some people say it helps, others say it's a placebo; personally I've never bothered with it. You could try using faux's kernel with the intellidemand governor, which sets the clock speed (and whether the second core is online/offline) depending on the CPU load. As for best settings, it depends on each individual kernel and your own personal needs, so you might want to try flashing a few custom kernels to decide which one is for you.

hunter890 said:
Fauxclock hasn't been updated in ages and it's by Romanbb, not faux, afaik.
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Ah, learn something everyday. Whenever I sideloaded the apk on CM7, the author was listed as "faux123".

sshede said:
Ah, learn something everyday. Whenever I sideloaded the apk on CM7, the author was listed as "faux123".
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I know. I used to get confused too, especially since the app is called fauxclock! But faux mentions it's made by Romanbb on his kernel thread so... yea.
Sent from my HTC Sensation using XDA

[Q] Sensation Heating Issue!!! Probable Solution!!

Pardon me if i have brought up silly or crazy question but I have to ask it
I have a sensation and have been using vipers rom from very beginning with cpu to 1.5Ghz and 3d/2d slightly overclocked. and there is heating issue at area around Sim/sdcard slot and front screen part while surfing web or playing games(basically while using resource hogging apps) That's where cpu is located i believe. [also the phone starts lagging when it heats TOO MUCH]
Then past month i clocked every thing back to sensation's default. it helped to cool the temp lil'bit.
Then few days ago I switched to Sultan kernel which dramatically makes my phone lot cooler than it used to.(but still heats up) I overclocked to 1.5Ghz and is still cool. Undervolted to -50 worked fine. Then i started to tweak 3d/2d gpu overclock/underclock and it heats up like before. So, here i think proper tweaking the cpu,gpu can generate less heat on the phone but I have tried many things as i mentioned above and i am not sure what exactly is making the phone hot or cool down or what to do about overclocking/underclocking/undervolting, etc,etc,etc
So here I am asking other user for their guide for proper tweaking the phone to its best performance without heating it up. Any suggestion??:silly: what cpu freq?? 2d gpu freq?? 3d freq?? undervolting?? leaving stock??
I dont mind clocking the cpu to 1.2ghz or 1.5 ghz.. the processor on sensation can handle upto 1.8 or so just fine. But all i want it to generate less heating, more performance and definitely more battery life.. so any suggestion?:fingers-crossed:
This info can help other noob out there (specially me) to tweak their phone without worrying what to do and what freq to use....Cheers
For more info i use anker battery.. and as far as i know battery is not the cause for heating on sensation.

Bricked is the best kernel for the heating problem. Don't oc the cpu and gpu and you should be fine. The only problem is that bricked is a bit laggy
Sent from my HTC Sensation Z710e using Tapatalk 2

overclock gpu produce much heating (my experience) and that also bring not much more performance. Overclock cpu produce of course some heat too, but not that much. Also undervolting the cpu reduce the heating.
I think the coldest one are, which are more close to stock.

Hi,
Overclocking whether CPU or GPU will definitely cause heat, you cannot have both performance and coolness besides each other ever; in case you want performance, then you have got to tolerate high temperatures and further, a bit lag. But if this heating thing bothers you too much, then you have to stay with a lower CPU/GPU frequency. In this case, if you still do not want to lose your performance TO AN EXTEND, then I recommend flashing an AOSP/KANG ROM instead of Sense based ones.
Good luck :good:

elvisypi said:
Bricked is the best kernel for the heating problem. Don't oc the cpu and gpu and you should be fine. The only problem is that bricked is a bit laggy
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Unfortunately bricked didn't worked out for me, also was a bit laggy like u mentioned.
I have set the cpu to 1.2Ghz and both 2d/3d underclocked with -50UV.. As of now working like charm.:good: But I wanna know, Does underclocking Gpu has any effect on performance??

Saron01 said:
Unfortunately bricked didn't worked out for me, also was a bit laggy like u mentioned.
I have set the cpu to 1.2Ghz and both 2d/3d underclocked with -50UV.. As of now working like charm.:good: But I wanna know, Does underclocking Gpu has any effect on performance??
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In case you've flashed Sultan Kernel in which Ville C2's GPU drivers are included, then IN MY OPINION there would be no problem at all.
I'll provide the link to it if you couldn't find the correct one.
That pretty "Thanks" button's waiting for U, in case I helped
∫εทт ƒя๑๓ α ∫нαкεท บρ нтς ∫εทรαтï๑ท жξ บรïทg... พнαтενεя! Dεяร?!

don't worry for the heat my phone goes up to 80°C and is still working fine. no problem at all. so remember to not use 1800 mhz use max 1620mhz and max 320 gpu 3d. will wil get good perf. always use PYD-X or SB FM (ICS) or (JB)

put it in the fridge when overheat.not joking.i always need to do that:screwy:
Sent from my HTC Sensation using xda premium

sunnytse1 said:
put it in the fridge when overheat.not joking.i always need to do that:screwy:
Sent from my HTC Sensation using xda premium
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Oh yeah, I overclock my phone up to 1944 with fridge
Sent from my HTC Sensation XE with Beats Audio Z715e using xda premium

ashkan-khatar said:
In case you've flashed Sultan Kernel in which Ville C2's GPU drivers are included, then IN MY OPINION there would be no problem at all.
I'll provide the link to it if you couldn't find the correct one.
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Using sultan r17.5 . hope that's the one.
sunnytse1 said:
put it in the fridge when overheat.not joking.i always need to do that:screwy:
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I used to do that too with my old phone.:highfive:
Currently clocked everything at it's default with -50UV and it works great without heating too much like before. Although one question remains for me. Does underclocking gpu has any negative impact on performance????

Saron01 said:
Using sultan r17.5 . hope that's the one.
Although one question remains for me. Does underclocking gpu has any negative impact on performance????
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answered you... if there were more answers, there would have been done already for your former post.

ashkan-khatar said:
answered you... if there were more answers, there would have been done already for your former post.
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Does underclocking gpu has any negative impact on performance????

Saron01 said:
Does underclocking gpu has any negative impact on performance????
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Underclock your 2D GPU to 145MHz on my kernel. Underclocking the GPU can make transition animations and games laggier HOWEVER unclocking the 2D GPU instead of the 3D GPU will do no harm and the difference is barely noticeable. Your homescreen will also be just as smooth as before because Rosie is rendered by the 3D GPU, not the 2D GPU. If underclocking your 2D GPU to 145MHz doesn't make your phone as cool as you want it to be then you can also lower the speed of your 3D GPU. If your phone is still getting hot after unclocking your GPU then use a more energy efficient CPU governor like Badass or Intellidemand. Also, in my kernel's Aroma installer, enable mpdecision. The mpdecision in my newest beta for Sense ICS ROMs (r18b3) works best, so install r18b3 and see how you like it. You can download r18b3 from here: http://goo.im/devs/sultanxda/Pyramid_Sense_BETA/Sultan-kernel-r18b3-Sense-Aroma.zip

android1234567 said:
The mpdecision in my newest beta for Sense ICS ROMs (r18b3) works best, so install r18b3 and see how you like it.[/URL]
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flashed r18b3, clocked cpu at default freq, 2d/3d both slightly under-clocked, -25UV, enable mpdecision, intelldemand governer and walla.... its running smooth again :victory: playing nfs, no laggy feeling whatsoever, still heats up at the bottom part but its bearable
And thank you for your awesome kernel man.. keep up the good work:good::good::good:

Saron01 said:
flashed r18b3, clocked cpu at default freq, 2d/3d both slightly under-clocked, -25UV, enable mpdecision, intelldemand governer and walla.... its running smooth again :victory: playing nfs, no laggy feeling whatsoever, still heats up at the bottom part but its bearable
And thank you for your awesome kernel man.. keep up the good work:good::good::good:
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Be careful with battery life on r18b3 though; people have reported that the phone doesn't go into deepsleep with Intellidemand so your battery may drain.
Sent from my HTC Sensation using xda app-developers app

android1234567 said:
Be careful with battery life on r18b3 though; people have reported that the phone doesn't go into deepsleep with Intellidemand so your battery may drain.
Sent from my HTC Sensation using xda app-developers app
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thanks for the heads up, using smartassV2 right now...any prob with this governer??
EDIT: nope all governors are consuming abt 50% of processor power while in screen off or deepsleep/ideal mode.