Develop Bugs

What is the benefit of running a custom kernel?!

Just what the title of the thread reads.
I am running damagecontrol 3.2.3 rom with the base kernel but i have noticed that others are running custom kernel..
what is the benefit and is it reversible if i don't like it and want to flash back to the base? Thanks for the help guys.

There are severl different potential benefits such as: higher FPS, lover voltage, high frequency of the CPU, etc. Do a nand back up first. Flash a new kernel, if you don't like it run a nand restore.

I find the custom kernels drastically improve the battery life of the device.

I'm having trouble finding the kernels, even if I search for, say "bfs fps kernel." Is there a thread that links them all, or at least compares them to tell which is for what?

Here's the best kernel I've found so far:
http://forum.xda-developers.com/showthread.php?t=719763
netarchy-toastmod 3.7.3c. Getting high FPS, and much better battery life.

drmacinyasha said:
Here's the best kernel I've found so far:
http://forum.xda-developers.com/showthread.php?t=719763
netarchy-toastmod 3.7.3c. Getting high FPS, and much better battery life.
Click to expand...
Click to collapse
I've been on the ffolkes kernel for DC for awhile now, and I get 45 fps. Tried the netarchy awhile back and got low fps. Tried the newest one just a minute ago, fps in the 20's. The suck.

effluent said:
I've been on the ffolkes kernel for DC for awhile now, and I get 45 fps. Tried the netarchy awhile back and got low fps. Tried the newest one just a minute ago, fps in the 20's. The suck.
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Click to collapse
You're either not using the right kernel, or something is screwed up on your phone. I'm getting 50+ FPS when I put SetCPU on Performance.
Make sure you put SetCPU on Performance and not on-demand or userspace.

Last time I tried netarchy's kernel I don't remember clocks making a difference in FPS much..
If he has 20FPS setting the clock to performance likely won't do crap.
My recc. read the damn thread!

topdnbass said:
Last time I tried netarchy's kernel I don't remember clocks making a difference in FPS much..
If he has 20FPS setting the clock to performance likely won't do crap.
My recc. read the damn thread!
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Click to collapse
If you're underclocked and undervolted to 128Mhz and SetCPU is preventing it from going up, I'm fairly sure you're not going to get very high FPS.

Im using netarchy-toastmod-3.7.3-kernel and i got over 53fp.It true that help save battery and high cpu. Find here http://ip208-100-42-21.static.xda-developers.com/showthread.php?t=719763
just in case wanna a stock kernel 2.6.29 , you can find here: http://www.mediafire.com/?55dhnr5579xil7h

Are you getting 50 fps on an epson or novatec screen?
Sent from my HTC EVO 4G.

SetCPU on Performance, overclocked to 1158Mhz.

Guys, in your best subjective opinion, which kernel should I run with damage control 3.2.3? I'm not worried about overclocking very much. Also how do I find out which screen I have for my phone?
Thanks
Sent from my PC36100 using Tapatalk

drmacinyasha said:
If you're underclocked and undervolted to 128Mhz and SetCPU is preventing it from going up, I'm fairly sure you're not going to get very high FPS.
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Click to collapse
A bottleneck is not the same thing as stock clocks.
Trix, try looking around. This has been answered about 1000 times.
Quick way, if your brightness control fades it's nova, if not its epson.

drmacinyasha said:
Here's the best kernel I've found so far:
http://forum.xda-developers.com/showthread.php?t=719763
netarchy-toastmod 3.7.3c. Getting high FPS, and much better battery life.
Click to expand...
Click to collapse
+1
10chars.
trixr750 said:
Also how do I find out which screen I have for my phone?
Thanks
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
adb shell into your phone, and do a dmesg | grep mddi

trixr750 said:
Guys, in your best subjective opinion, which kernel should I run with damage control 3.2.3? I'm not worried about overclocking very much. Also how do I find out which screen I have for my phone?
Thanks
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
My vote is for ffolkes undervolted kernel. Performance is good, FPS is good on both epson and novatek, and I have achieved fantastic battery life with it.

trixr750 said:
Guys, in your best subjective opinion, which kernel should I run with damage control 3.2.3? I'm not worried about overclocking very much. Also how do I find out which screen I have for my phone?
Thanks
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
I have used both ffolkes and netarchy
ffolkes i got better battery life however if you have a nova screen you need to search for and download "Novafreq" app and play with it a little tog et the best results for FPS. My normal FPS on this kernal was 40-43.
Netarchy - YOU DONT use Novafreq (which may be why some of you got such a low FPS on it, you really want to be at its stock which i believe is 380 or you will get horrible fps) With netarchy i get better FPS but slightly less battery saving. my average FPS with netarchy is 49-52FPS
Over all the battery saving was a significant amount or me between the too but it was slightly noticeable. In the end i chose Netarchy since i felt the added FPS was more significant then the slight battery increase.
The other reason i choose Netarchy is it gets updated frequently where ffolkes seems to have stopped at what it is (nothing wrong with that since it was mainly made to fix FPS on Nova screens)

Ive gotten 50-51fps on profiled setup in setcpu. even all the way down to 384. Running Netarchy & OMJ Rom

OC'ing

What's a safe level to overclock my phone to? I'm running the latest MIUI (1.9.16) with the lastest Tiamat kernel (1.1.3) I'm at about 1344 MHz right now. Can I go much highter?
Sent from my rooted, MIUI DInc2

From my testing, I've found there isn't to much to be gained going over 1.6ghz.
For a safe level I keep mine at 1.2 ghz. This has worked out well for me. Try different frequencies and see what works out for your needs.

I'm running JDKernel with the max set at 1.5 ghz, using the smartass governor. When I look at the "time in state" info, it usually shows about 75% of my time spent at 768 mhz. Seems to be working great.
Sent from my Incredible 2 using XDA App

Well, I tried bumping it up to 1.6, and I locked my phone and the screen turned off, but the keys stayed on, and it wouldn't come back up. So I pulled the battery and went back to 1.3 like it was before. Now its working great. I'm on smartass v2
Sent from my rooted, MIUI DInc2

If your having lockups, try installing Incredicontrol from the market and bump up the voltage on the higher frequencies 25-50mv, this should keep you from locking up. I do this when I use the performance governor and want to run Quadrant or Linpack .

PacerguyDon said:
If your having lockups, try installing Incredicontrol from the market and bump up the voltage on the higher frequencies 25-50mv, this should keep you from locking up. I do this when I use the performance governor and want to run Quadrant or Linpack .
Click to expand...
Click to collapse
I've been using SetCPU, cuz I couldn't understand Incredicontrol..... What's ideal if I'm running around 1.6 for voltage?

On the Jd Kernal, I'll bump it up to 1450 and go from there.

PacerguyDon said:
On the Jd Kernal, I'll bump it up to 1450 and go from there.
Click to expand...
Click to collapse
So, you don't know about for Tiamat? I'm using that one.
Plus, would anyone recommend using his Incredikernel as well?

I'll go about the same on the Tiamat. I usually will start at 50 mv over whatever the stock setting is on the kernel when running performance runs.
I didn't know that Chad had done a Kernel for Aosp romed Dinc2's. I know his Dinc1 Kernels were great.

I accidently had my phone at 1.9 for a day running jdkernel, no crashes or anything
Atm when my phone is charging, it gets bumped up to 1.4 and i have no issues at that speed.

(Q)I have a og evo and cant overclock it 1.2ghz.

I have a og evo I want to know why when I overclock to 1.2ghz it freezes my phone why does it do that ?
Sent from my Nocturnal 4G using xda premium

Each Evo is different. Some of them can't handle that high overclock, or can't be undervolted very low. Each one is different, each has its limits.
I don't understand the big deal with overclocking. It burns your battery faster. I personally underclock, with little to no lag and is good enough for my casual gaming needs

Mine doesn't like a clock much at all. I can get about 1.1 before it starts locking up but even then it hangs a lot. I honestly don't see a difference from 1.0 to 1.2. Get a decent rom, good kernel and try out the v6 script an I almost guarantee you will like that better.

beaumontcali48 said:
I have a og evo I want to know why when I overclock to 1.2ghz it freezes my phone why does it do that ?
Sent from my Nocturnal 4G using xda premium
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Click to collapse
Well for us to be able to help you, you would need to provide us with more details on how you are trying to accomplish this.

I use no frils cpu but have also tried setcpu and viperMOD I know that's the best way to overclock but is very confusing. Have any step by step instructions to of to 1.2 I know having higher voltages helps as well.
Sent from my Nocturnal 4G using xda premium
Sent from my Nocturnal 4G using xda premium

Overclocking is overrated. If you need to overclock for every day usage, then something is wrong - at least in my opinion. Resource intensive gaming is different, but you shouldn't need to overclock for browsing, texting, casual games, etc.
Try out the V6 Supercharger script. I'm not currently using it, but have in the past and it seemed to make my phone more snappy. A lot of people swear by it and it's a great script, definitely worth a shot. There are other things you can do to speed up your phone without overclocking. I'd try other options first since overclocking will chew through your battery. Increase the dalvik vm heap size, there are plenty of free apps on the market to help with this task. Uninstall apps you don't use, I'll bet that you never use some of the apps on your phone. Back them up with Titanium Backup and you can restore them if you ever need them again.
In case you didn't already know, the Evo can't overclock past 1.2, I'm not 100% sure why - it has something to do with the processor.
Supersonic Evo 4G | MIUI | Tapatalk

I never oc over 1075 and only when plugged in if i play a game I need to oc.for I just activate my charging profile and plug up and play 1.2 ghz is a good chance of doing serious.damage as these older scorpion processors get very very hot at that clock speed so they lock up to try and protect themselves from heat damage or they shut down the phone 1075 is as high as you should need to go for any games the evo can handle on the subpar gpu
Sent from my Classic-EViLizED-ToMAToFiED-EVo4g-

beaumontcali48 said:
...also tried setcpu and viperMOD I know that's the best way to overclock.
..
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Click to collapse
I'm pretty sure viperMOD is more for undervolting than overclocking, which are not suppose to be combined together. I am running vipermod with max voltages - 50. Other nite was playing snes9x and was getting some lag with a game so I bumped max CPU up to 1.2. Phone went into a bootloop and had to superwipe and reflash everything. Don't know if its b/c vipermod + 1.2 CPU or just bumping up CPU. Didn't try it again.
Support TrevE!!

shift
Get a shift. Mine runs fine at 1.9. But usually run it art 254-1200 on demand.

{ParanoiA} said:
I'm pretty sure viperMOD is more for undervolting than overclocking, which are not suppose to be combined together. I am running vipermod with max voltages - 50. Other nite was playing snes9x and was getting some lag with a game so I bumped max CPU up to 1.2. Phone went into a bootloop and had to superwipe and reflash everything. Don't know if its b/c vipermod + 1.2 CPU or just bumping up CPU. Didn't try it again.
Support TrevE!!
Click to expand...
Click to collapse
You can overclock and undervolt together just fine. You just need to ensure that every frequency has a high enough voltage to run the processor at that step. My Evo is overclocked and undervolted just fine, although IIRC I can only push it up to 1.1 GHz . My tablet is 1ghz to 1.6ghz and is undervolted as well, though.

merge rls 2.0, iron monkey, Droid overclock because of the profiles options. I set up four profiles including one for temp. sometimes i'm underclocking and sometimes overclocking but only up to 1.19 to prevent freeze and boot loops. Only downside is right at open Droid overclock needs su permission but that is my choice since profile changes at open.
Very snappy afterwards.
Sent from my PC36100 using XDA Premium App

When I had the 4G, I was never able to go above 1118, or somewhere around that. It would have freezing issues.
On my evo shift, I was able to do 1.7 gHz (compared to stock 800 mhz) ok. 1.6 pretty reliabily, and I could run 1.5 all day long. Some guys could do 1.9. It just depends on the phone.

Actually overclocking and undervolting is counter-productive. What you should do, is read carhaulers and ropodopes guide over at vaelepak. Its give some good useful info about how to set up a good aosp rom. I'm underclocked, undervolted, and still getting 1400+ benchmarks. Check it out bro. You'll love the results.
Sent from my PC36100 using xda premium

tommy0823 said:
Actually overclocking and undervolting is counter-productive. What you should do, is read carhaulers and ropodopes guide over at vaelepak. Its give some good useful info about how to set up a good aosp rom. I'm underclocked, undervolted, and still getting 1400+ benchmarks. Check it out bro. You'll love the results.
Sent from my PC36100 using xda premium
Click to expand...
Click to collapse
Shoot the brutha a link
TrevE Supporter!

tommy0823 said:
Actually overclocking and undervolting is counter-productive. What you should do, is read carhaulers and ropodopes guide over at vaelepak. Its give some good useful info about how to set up a good aosp rom. I'm underclocked, undervolted, and still getting 1400+ benchmarks. Check it out bro. You'll love the results.
Sent from my PC36100 using xda premium
Click to expand...
Click to collapse
What? Overclocking and undervolting are two completely different things, and they aren't mutually exclusive. Unless you can provide a good reason as to why it's counter productive to do both, I don't buy that at all. Just checked my phone, my overclock requires an extra 25 mV for all three steps I've overclocked. 25mV isnt much, and it certainly isn't going to kill my battery that much faster.
Besides, the only time the CPU is going to be entering these high power modes is when it needs to do work, and it's better to do work as fast as possible to go back to sleep. Would you rather wake up, do a mundane task for 5 minutes, then go back to sleep or wake up, do a task at 2x the speed while only consuming 30-50% more energy, then going back to sleep after only 2.5 minutes?
HUGI is real.
Sent from my Transformer TF101

Yea shot me the link too bro.
Sent from my PC36100 using xda premium

First let me say I don't use viper mod or any voltage controlling mod.
On sense 3.0 roms such as mikg I over clock to 1152 and set the minimum to 384 and its smooth as butter. No problem and battery lasts all day.
On aosp however such as decks (I'm on it now) I underclock to 499 and leave the min at 254. Smooth as always and battery lasts forever.
Anything past 1152 is going to cause problems (at least in my experience) also the rom/kernel can effect how much you can overclock.
Sent from my PC36100 using xda premium

Gary13579 said:
What? Overclocking and undervolting are two completely different things, and they aren't mutually exclusive. Unless you can provide a good reason as to why it's counter productive to do both, I don't buy that at all. Just checked my phone, my overclock requires an extra 25 mV for all three steps I've overclocked. 25mV isnt much, and it certainly isn't going to kill my battery that much faster.
Besides, the only time the CPU is going to be entering these high power modes is when it needs to do work, and it's better to do work as fast as possible to go back to sleep. Would you rather wake up, do a mundane task for 5 minutes, then go back to sleep or wake up, do a task at 2x the speed while only consuming 30-50% more energy, then going back to sleep after only 2.5 minutes?
HUGI is real.
Sent from my Transformer TF101
Click to expand...
Click to collapse
Its counter productive because it is giving less to something that needs more. (Don't take this post as me trying to be a ****. Just voicing how someone explained it to me a while ago)
Think of this as cars.
Lets say you have a nice fancy v8 mustang. Stock, everything is well, balanced.
If you start adding parts and get it pushing out 1000 horsepower (overclock) your most likely gonna need more feul (voltage) or at least stock amount flowing into the engine just to keep it running.
Now lets say you got that same 1000 horsepower gas destroying mustang and you start to lower the amount of gas flowing into the engine (undervolt (done in vipermod)) cylinders (CPU) wont get enough gas, it wont work, and your stuck going no where.
So if that made sense (did to me) then you can see why they are counter productive. Unless your using vipermod to overvolt (which idk if you can since I don't use it) then you can disregard this whole post
Sent from my PC36100 using xda premium

Your car analogy is completely irrelevant. You can look up the exact voltages that the CPU runs on at every frequency, *even when overclocking*. Overclocking an Evo 1ghz to 1.2ghz takes maybe a 5% bump in voltage, and that 5% extra power is only going to be used *when the CPU is running at max speed* (which is only when there is a lot of work to do), and even then, it's *still better to let the CPU run at max speed with a tiny bit more power consumption than to cap the CPU at a slower speed and make it work for even longer*. Intel calls it HUGI, Hurry Up and Get Idle.
I know what I'm talking about, and I wish people would stop trying to argue with me based off of second hand speculation. I do this for a living, after all. There is absolutely nothing wrong with overclocking and undervolting, and it's the best way to get the most battery life *and* performance out of your phone, period.
Sent from my Transformer TF101

Gary13579 said:
Your car analogy is completely irrelevant. You can look up the exact voltages that the CPU runs on at every frequency, *even when overclocking*. Overclocking an Evo 1ghz to 1.2ghz takes maybe a 5% bump in voltage, and that 5% extra power is only going to be used *when the CPU is running at max speed* (which is only when there is a lot of work to do), and even then, it's *still better to let the CPU run at max speed with a tiny bit more power consumption than to cap the CPU at a slower speed and make it work for even longer*. Intel calls it HUGI, Hurry Up and Get Idle.
I know what I'm talking about, and I wish people would stop trying to argue with me based off of second hand speculation. I do this for a living, after all. There is absolutely nothing wrong with overclocking and undervolting, and it's the best way to get the most battery life *and* performance out of your phone, period.
Sent from my Transformer TF101
Click to expand...
Click to collapse
Hmm, *interesting*. I believe the best answer to the OP was covered rather well earlier. It's all about your rom/kernel/hardware combination. With all the variables to consider as relevant, your best bet is to experiment and find what works for your device. Don't check set on boot untill you are confident the set-up is stable. Higher is not always better with overclocking. My device runs blazingly well underclocked @768max. Gets insanely great battery @499max. However my quadrants are better @ 1036 than at 1190.
Great thing about android is you can experiment and learn through trial and error.
Sent from my PC36100 using xda premium

phone heats up and restart with all custom kernels

has anyone else experienced this? i have this happen to me quite a few times using bullet/synergy kernal
basically what happens is that my phone will always heat up and crash then it restarts itself..even when it's idle
i've used faux clock to keep my phone from ocing but this still seems to happen..

Try Fauxs kernels.. always stable....check your OC setting and UV settings...flash it and use at it's out of the box setting
Sent from my SGS2

Vinsane said:
Try Fauxs kernels.. always stable....check your OC setting and UV settings...flash it and use at it's out of the box setting
Sent from my SGS2
Click to expand...
Click to collapse
oc settings is set to keep the clocks at stock
i tried undervolting it by 12mv and my phone was ok, then i went a bit lower and my phone crashed again, not quite sure if i should try another custom kernel, i feel like im on the brink of bricking my phone

Yeah..not all chips are created equal...so keep it to where it's stable and you should be good. Flash Fauxs.. leave all the settings as it came and see how it does for you
Sent from my SGS2

Vinsane said:
Yeah..not all chips are created equal...so keep it to where it's stable and you should be good. Flash Fauxs.. leave all the settings as it came and see how it does for you
Sent from my SGS2
Click to expand...
Click to collapse
i dont think its actually a chip issue
my settings were
1.512ghz max 384mhz min
and
at screen off
540max
384 min
my phone heated up and crashed when i turned the screen offf..so it seems more like a software bug rather than hardware imo..
i think you misunderstood me lul. so here's the entire story
i flashed synergy a couple weeks back and had this issue, so i thought o well and went back to eaglesblood(which is pretty much stock everything)
then i decided to try jugs+bullet, it seemed fined until i went to sleep and wokeup with a phone that has its battery drained and is hot to the touch
now the settings were set to not overclock, so it doesnt seem like my chip is causing the issue

If your chip heats up enough to cause it to crash and reboot...that's not a good sign man..especially if you've tried different kernels and don't have crazy settings.
One more flash won't hurt right?
Maybe try a new combo... different rom and kernel?
Sent from my SGS2

Vinsane said:
If your chip heats up enough to cause it to crash and reboot...that's not a good sign man..especially if you've tried different kernels and don't have crazy settings.
One more flash won't hurt right?
Maybe try a new combo... different rom and kernel?
Sent from my SGS2
Click to expand...
Click to collapse
im on faux right now
it does sound bad, but its been fine when im on eaglesblood(stock kernel)
so im a bit confused all around

thing is, im playing gta 3 right now and its barely heated up, so it confuses me why it would heat up and crash/restart when its friggen idle..

Like some are saying try faux's kernal. I used to have the same problem when ocing my sgs and g2x everyone's phones are different but so far faux kernal is very stable
Sent from my SGH-T989 using xda premium

BowLow said:
Like some are saying try faux's kernal. I used to have the same problem when ocing my sgs and g2x everyone's phones are different but so far faux kernal is very stable
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
read up lul, im using it and it's been good so far

ya the faux kernel is doing really really well
on synergy/bullet i used to get under 4500 antutu score..
now im getting 6458 and im not even overclocking..

I unerstand this isn't what was asked, but I've never had heat issues, using the stock roms cleaned-up by myself after root. The new 2.3.6 is solid as well.

heinrich said:
I unerstand this isn't what was asked, but I've never had heat issues, using the stock roms cleaned-up by myself after root. The new 2.3.6 is solid as well.
Click to expand...
Click to collapse
i wasnt talking about the stock kernel, i was talking about synergy and bullet

Cool. Glad it worked out for you man
Hint - find his. 06 version with gpu Turbo.... freaking awesome
Sent from my SGS2

Vinsane said:
Cool. Glad it worked out for you man
Hint - find his. 06 version with gpu Turbo.... freaking awesome
Sent from my SGS2
Click to expand...
Click to collapse
This things plenty fast without overclocking, I'm in no overcompensation contest to get my benchmark scores higher lull

What app to Overclock this phone?

Coming from the EPIC and would like to OC this phone a little. DL and installed SETCPU, but it showed it maxed out. Any advice? Thanks!

sandman512 said:
Coming from the EPIC and would like to OC this phone a little. DL and installed SETCPU, but it showed it maxed out. Any advice? Thanks!
Click to expand...
Click to collapse
You need a kernel that allows overclocking.

Thanks for the reply.

Phone's not fast enough for you at 1.5GHz? I'm underclocked to 1Ghz on CM10 and its still insanely smooth.

El,
Got to be honest, yeah it's fast and smooth, but a little more wouldn't hurt.

sandman512 said:
Coming from the EPIC and would like to OC this phone a little. DL and installed SETCPU, but it showed it maxed out. Any advice? Thanks!
Click to expand...
Click to collapse
The kernel in this thread will allow you to overclock to 1.89 GHz, be warned that it drains major battery though: http://forum.xda-developers.com/showthread.php?t=1766484

Thanks for the reply. I'll probably stick with STOCK, don't wont to risk battery life.