Develop Bugs

[KERNEL] smartass cmkernel 11/26/11]

This is based on the cyanogenmod kernel, with the main change being the smartass governor has been added and is default.
The zip file is in koush's anykernel format, so it can be flashed just like a rom.
Changes:
Smartass governor by erasmux is default
extra overclock enabled
patch #22 by farmatito
disabled CONFIG_SERIAL_MSM
NO SUPPORT WILL BE GIVEN. ONLY FLASH IF YOU KNOW WHAT YOU ARE DOING. NO ONE IS RESPONSIBLE EXCEPT YOU. BLAH BLAH BLAH.
Newest
2.6.35.14-oc-cm-smartass_g0dd6e8c.zip
source: http://github.com/dumfuq
old versions: http://www.mediafire.com/dumfuq

What does the smartass governor do?

mackster248 said:
What does the smartass governor do?
Click to expand...
Click to collapse
smartass governor - is based on the concept of the interactive governor.
I have always agreed that in theory the way interactive works - by taking over the idle loop - is very attractive. I have never managed to tweak it so it would behave decently in real life. Smartass is a complete rewrite of the code plus more. I think its a success. Performance is on par with the "old" minmax and I think smartass is a bit more responsive. Battery life is hard to quantify precisely but it does spend much more time at the lower frequencies.
Smartass will also cap the max frequency when sleeping to 352Mhz (or if your min frequency is higher than 352 - why?! - it will cap it to your min frequency). Lets take for example the 528/176 kernel, it will sleep at 352/176. No need for sleep profiles any more!
i googled it lol, seems like its a bit more responsive then interactive, and it ramps down quickly too. could give some battery savings

What ROM's will this work with?

keeps cpu at/above 768mhz, will not go below until you switch off smartass gov.
liking the "sleep" enhancement, but seems like it should let the processor scale on down to 245 when idle with screen on

I'm running this with CM7 Nightly #16 and it's running really well. I'm getting a little more battery consumption than I do with zinx's kernel, but that could just be because I've only been using the kernel for around 2-3 hours. It may need a little more time to settle? I'm not sure, but it is definitely snappier! If it does scale down the cpu during screen off, you can't tell at all! It doesn't have any lag when unlocking like setting profiles usually does. So I'm really stoked about this kernel! Great work as always Dumfuq! This will be my new kernel for at least a few days to give it more of a chance.
PS: I'm only getting around 29 on linpack at 1.017 GHz, where as with zinx's I was getting 38's. Smartbench scores are at 1320's for productivity and 1869 for gaming. So those both beat out zinx's kernel. Just wanted to put those out there so people have some kind of a comparison point.

posted a v2. The difference is frequencies are changed to match glacier frequencies instead of hero's.
The only noticable difference here is that when the screen is off the frequency scales between 245 and 368 instead of being stuck at 245.

dumfuq said:
posted a v2. The difference is frequencies are changed to match glacier frequencies instead of hero's.
The only noticable difference here is that when the screen is off the frequency scales between 245 and 368 instead of being stuck at 245.
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Click to collapse
Damn. Nice!

Works with evil's MIUI 1.1.26 r2..Hopefully battery life will increase now.
Edit: breaks video playback in miui

sl1k1 said:
Works with evil's MIUI 1.1.26 r2..Hopefully battery life will increase now.
Edit: breaks video playback in miui
Click to expand...
Click to collapse
Smartass is already compiled in.
Sent from my HTC Glacier

I use this on my GF's Mytouch Slide and she gets 20+ hr's on a charge overclocked @ 825. Was so hoping someone would port the kernal to this phone. thx dumfuq ^^

Trying to decide if I want to flash this over the stock cm7 kernel.
Has anyone noticed any gains from doing this? what about compared with the stock cm7 kernel + setCPU?

flashed this over build 16, cm7. I still use setcpu. no problems, everything is smooth like butter. Definitely smoother than it was before. no wake up problems, no play back problems. thanks for this =]

Does wifi calling also work with this? Anyone know?

brian6685 said:
Does wifi calling also work with this? Anyone know?
Click to expand...
Click to collapse
You could always flash it and find out, and if not, just restore the backup you made prior to flashing it. ;] I don't see why it wouldn't it hasn't broken anything for me.

K ill try it out later when I get home from work. Thanks

whats the mhz setting on this by default? not super fond of setcpu. though i do like this idea of a custom throttle and logic. so i figured if the mhz is high enough then i'll give it a shot.

brian6685 said:
K ill try it out later when I get home from work. Thanks
Click to expand...
Click to collapse
let us know what happens

here's my initial test of the v2 as far as battery goes...

looks like wifi calling works ;]
I've had great battery life with this kernel so far.

Safe overclocking

First off, I know that this question has been asked before as I have searched and read various topics, but I'm not sure if additional information has been gained or new technology discovered. These are the the overclock options I have:
(MHz)
1036800
1075200
1113600
1152000
1190400
1228800
1267200
__________________
1267200 usually freezes my phone after a bit.
I work full time so battery isn't a huge issue for me, I would just like to know people's opinions on the option which provides the best performance while keeping the device stable and not DRASTICALLY reducing battery life.
Also, I'm not sure if there is any more info on sbc kernels, but if there is I would like to hear opinions on the kernel I'm currently using (sig).
Thanks everyone

Highest I go is 1152 but all phones r different.

Papa Smurf151 said:
Highest I go is 1152 but all phones r different.
Click to expand...
Click to collapse
I never over clock, but that I hear is common, but anything over 1.2 typically will send you into bootloops, so don't check set on boot till you test it.

122800 isn't causing bootloops, is it safe? Tiamat evo sbc 4.03 cayniarb linuxdesk #8 won't let it overheat right?
SBC is generally accepted as safe now right? Are there other unrestricted overclock undervolt hybrid adaptive voltage scaling sbc kernels with teamwins hdmi optimizations and wimax support plus tether/hotspot with default smartass gov recommend over Tiamat?
Thanks so much for all your help
Sent from my PC36100 using Tapatalk

I don't see why you would need to overclock this phone is fast as Hell anyways its not a computer playing big ass games. Overclocking just heats and beats your phone up more.

Alright, thanks so much for your everyone
Sent from my PC36100 using Tapatalk

overclocking dhd

I have recently rooted my dhd and currently running CM7. Using the cpu setting within the performance menu I am wondering what peoples thoughts are on a noticeable but safe increase of cpu speed. its set as 1017MHz which i believe is default. I am told I can run anything up to 1500 safely. can anyone confirm this and also tell me what kind of result (performance and battery life) i should expect.
thanks

Well, I use Android Revolution HD (a sense rom, meaning heavy UI!) and i overclock to about 1.3GHz. In terms of battery life when it's awake, it seems a drain a teeny bit more readily, but I've never had a freeze on sense (quite rare)
On stock it underclocks to let the processor max at around 400MHz when the screens off, so that helps to really save a lot of battery on standby. On CM, I'd expect it'd feel more or less the same in terms of performance after you hit 1.2/1.3GHz

hmohammed43 said:
Well, I use Android Revolution HD (a sense rom, meaning heavy UI!) and i overclock to about 1.3GHz. In terms of battery life when it's awake, it seems a drain a teeny bit more readily, but I've never had a freeze on sense (quite rare)
On stock it underclocks to let the processor max at around 400MHz when the screens off, so that helps to really save a lot of battery on standby. On CM, I'd expect it'd feel more or less the same in terms of performance after you hit 1.2/1.3GHz
Click to expand...
Click to collapse
thanks for the reply mate. going to try out revolution HD soon i think. have you overclocked using a third party app or is there one built into that rom?
also im a little confused by the governors. 'on demand' is the default governor. Does that mean it will only use the max selected cpu speed when necessary? would you recommend using a difference setting?
cheers

rhodri11 said:
thanks for the reply mate. going to try out revolution HD soon i think. have you overclocked using a third party app or is there one built into that rom?
also im a little confused by the governors. 'on demand' is the default governor. Does that mean it will only use the max selected cpu speed when necessary? would you recommend using a difference setting?
cheers
Click to expand...
Click to collapse
The CPU is managed by the ROM itself. You can tweak it yourself by using setCPU (or similar), but I can advise you not to. Can't help you with the governors buddy, since I dunno what it is
Cheers

darude0306 said:
The CPU is managed by the ROM itself. You can tweak it yourself by using setCPU (or similar), but I can advise you not to. Can't help you with the governors buddy, since I dunno what it is
Cheers
Click to expand...
Click to collapse
nice one dude

I'm running cm7 and I'm overclocked to 1.5 ghz. It's been totally fine for months.
Sent from my Motorola Startac running Atari 2600 software!

rhodri11 said:
thanks for the reply mate. going to try out revolution HD soon i think. have you overclocked using a third party app or is there one built into that rom?
also im a little confused by the governors. 'on demand' is the default governor. Does that mean it will only use the max selected cpu speed when necessary? would you recommend using a difference setting?
cheers
Click to expand...
Click to collapse
Lucky you picked a linuxhead!
The system itself has a daemon (background process built into the system) that handles overclocking. It's all explained on the page and also on this thread:
http://forum.xda-developers.com/showpost.php?p=14638641&postcount=34279
You can use another app (like SetCPU) but the daemon usually handles screen off's quicker. The governors basically determine how the processor frequency is changed. I'll explain the common ones:
Performance - Runs at highest speed, so if you have a range of 200 to 1.3G, it'll stay at 1.3G all the time, not usually the best
Ondemand - The universal default for phone overclocking, it only changes the speed up after a certain percentage of the CPU is used, and it switches on the fly, so if the CPU is used too much at 400MHz, it'll ramp it up to maybe 600 or 800, and if it's still overused, it'll put it up to maybe 1 or 1.2G
Conservative - This is like ondemand, except it makes the changes more gradual. It can give noticable lags in the foreground at times, so this is mainly used when the phone is asleep (screen off)
Smartass - This governor is like ondemand, except it'll less readily switch frequencies to higher values when it detects the screen off. This isn't really used because the overclocking daemons take into account the phone being awake or not
Basically, there isn't really a need to change governors, only really frequencies if anything. The thread, however, does tell you how to change governors.

Im using latest LeeDroid GB 3.2.1 and to be honest with the work he's done with the Kernal (3.1.8BFS) I have found that the ROM is a lot MORE responsive without me overclocking the CPU.
Im not really sure how it all works, but I guess doing this on different ROMS has its own different out comes.

overclocking has me confused too, is there really that much of a benefit in it? how much will i gain from it?

toby_lerone said:
overclocking has me confused too, is there really that much of a benefit in it? how much will i gain from it?
Click to expand...
Click to collapse
There is a benefit when you use certain apps, or even sense itself. For example, I've never had sense ui freeze, or go slow. The under clocking helps to improve the rubbish battery life when your phone is asleep.
In terms of measuring the gain, I have no idea. Really, I'd think you could use a process heavy app, or benchmarking app and see.
There's also loads of guides on overclocking to help out! (that's how I got the hang of it! )
Sent from my Desire HD using XDA Premium App

For the need on OC, it depends on the kind of apps u're using. If u're happy w a non OC DHD, its totally up to u.
But for the UC, it works as a terrific battery saver, mich better/effective than other battery saver soln on market

The safe range depends on the DHD as the manufacturing changed even though same part, i'm OC 1.5GHz "On Demand" profile and under clock 245MHz on screen off "Power Save" profile.
Getting approx a day usage on Lee 2.1.

(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
Click to expand...
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.
..
Click to expand...
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

Undervolting wonder

Can anybody post the maximum undervolting settings for galaxy w?
Currently i have all settings -100mv. How much further can i go? How can i identify if I've overdone it?
Current Kernel: [Kernel][ICS] Arco+ V1.3's kernel & HurtSkyV2's kernel 29/3/2013

1.4 Ghz run stable down to 1.075 V for me.
With 1.050 V, is freezes after some seconds of the AnTuTu stability test.
I guess that stock voltage for 1.4 Ghz is 1.250 V, as it can be seen in arcos repo.

Nice under voltage

Yes, i am satisfied with the result.
Guess that 1.4 Ghz might be some kind of sweet spot, as my lowest voltage with 1.0 Ghz is something about 0.925 V.
Depends on the scenario, but the energy-per-cpu-cycle-ratio might be better with 1.4 Ghz after all, plus full calculation-thrust
Also had it running at 1.8 Ghz, and at one point with 2 Ghz, but i do not remmeber the voltages exactly.
Might have been something around 1.275 V for thw 1.8 Ghz one, also a good result.
By the way, there are quite big differences:
My Intel Core 2 Duo T6500 runs at its full 2.1 Ghz with the lowest possible voltage, 0.9250V, normal is 1.150V
On the other side, i had a desktop E6600, which needed much additional voltage for little OC, and was also bad for UV.
(seems as it was an exception, as they were known for excellent oc capabilities).
Sorry for OT

XR-7 said:
Yes, i am satisfied with the result.
Guess that 1.4 Ghz might be some kind of sweet spot, as my lowest voltage with 1.0 Ghz is something about 0.925 V.
Depends on the scenario, but the energy-per-cpu-cycle-ratio might be better with 1.4 Ghz after all, plus full calculation-thrust
Also had it running at 1.8 Ghz, and at one point with 2 Ghz, but i do not remmeber the voltages exactly.
Might have been something around 1.275 V for thw 1.8 Ghz one, also a good result.
By the way, there are quite big differences:
My Intel Core 2 Duo T6500 runs at its full 2.1 Ghz with the lowest possible voltage, 0.9250V, normal is 1.150V
On the other side, i had a desktop E6600, which needed much additional voltage for little OC, and was also bad for UV.
(seems as it was an exception, as they were known for excellent oc capabilities).
Sorry for OT
Click to expand...
Click to collapse
Thanked for sharing your numbers with everyone =)! may i know how can i safely experiment with undervolting? like what do i do to make sure there will be no hard-breaking or equivalent events from happening? and also how do i know i should stop and choose the voltage 1 level higher than my current value (i.e. when is the value too extreme that it could be bad for my phone)? Thank you in advance!

I shared my voltage in hadidjapri's CM9 kernel thread. Let me dig up the link for you...
Edit: Aha! Found it:
http://forum.xda-developers.com/showthread.php?p=38516105
As you can see in the table I've posted there, the undervolting varies according to frequency. I've undervolted by 175 on 1 GHz, and perhaps can still go 25 lower.
Sent from my GT-I8150 using xda app-developers app
---------- Post added at 03:00 AM ---------- Previous post was at 02:50 AM ----------
egagah said:
Thanked for sharing your numbers with everyone =)! may i know how can i safely experiment with undervolting? like what do i do to make sure there will be no hard-breaking or equivalent events from happening? and also how do i know i should stop and choose the voltage 1 level higher than my current value (i.e. when is the value too extreme that it could be bad for my phone)? Thank you in advance!
Click to expand...
Click to collapse
My suggestion is to use the numbers in the table I've posted. Use the phone for 2-3 days and see if it becomes wonky (random reboots, hangs, etc). Then try reducing the voltages to the "extreme undervolt" values in the graph I attached to that posting. Then lower the voltage for the 'sleep' frequencies first (369 and less), and slowly work your way to your maxfreq.
Sent from my GT-I8150 using xda app-developers app

For me it´s a bit different. At the upper frequencies (1000-1400MHz) I´m at the extreme UV voltages. But for the lower frequencies I need to be +25mV above the extreme UV settings.
So there is noone who can tell what the sweet spots for all the frequencies are. Each CPU is different and everyone has to find out his sweet spots himself.
For stability tests there are even some apps at the play store, though I found the facebook app to be the best stability test app at all. Where all the stability tests passed the facebook app crashed if I undervolted a little bit to much.

pepoluan said:
I shared my voltage in hadidjapri's CM9 kernel thread. Let me dig up the link for you...
Edit: Aha! Found it:
http://forum.xda-developers.com/showthread.php?p=38516105
As you can see in the table I've posted there, the undervolting varies according to frequency. I've undervolted by 175 on 1 GHz, and perhaps can still go 25 lower.
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---------- Post added at 03:00 AM ---------- Previous post was at 02:50 AM ----------
My suggestion is to use the numbers in the table I've posted. Use the phone for 2-3 days and see if it becomes wonky (random reboots, hangs, etc). Then try reducing the voltages to the "extreme undervolt" values in the graph I attached to that posting. Then lower the voltage for the 'sleep' frequencies first (369 and less), and slowly work your way to your maxfreq.
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alright i'm trying with the extreme UV settings now (with +25mV for freq <1000mhz, will reduce later if stable) but i'm not sure if its the new Queen Anne's Revenge v2.3 rom, hurtsky's 2.1 kernel, or the usage of smartassH3 + sio that is causing my phone to feel less responsive (like takes 2-3x longer time to launch apps like whatsapp, boat browser, also launching incredicontrol twice in a row crashes incredicontrol lol). Is this a sign that I am undervolting too much? because I've tried raising all values by up to 50 from the extreme UV but doesn't really help. also tried changing smartassH3 to smartassv2 (my previous governor)

egagah said:
alright i'm trying with the extreme UV settings now (with +25mV for freq <1000mhz, will reduce later if stable) but i'm not sure if its the new Queen Anne's Revenge v2.3 rom, hurtsky's 2.1 kernel, or the usage of smartassH3 + sio that is causing my phone to feel less responsive (like takes 2-3x longer time to launch apps like whatsapp, boat browser, also launching incredicontrol twice in a row crashes incredicontrol lol). Is this a sign that I am undervolting too much? because I've tried raising all values by up to 50 from the extreme UV but doesn't really help. also tried changing smartassH3 to smartassv2 (my previous governor)
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Undervolting doesn't affect performance, at least not directly.
What it affects are power consumption (i.e., battery life) and stability; some components within don't perform reliably with too low a voltage, and may internally reset themselves. This causes the kernel to go into panic (because the state in the kernel no longer matches the state of the hardware), and as a result, crashes.
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ok. i used CWM to clear cache and dalvik cache, which forced the rom to "upgrade" again. The lag is significantly less noticable =)! Perhaps when upgrading rom (non-pristine), it is better to clear cahces

how sorry i'm a newbie here may i ask how to undervolt (or a link)? i've been having problem with battery life so perhaps this will prolong it further..

Download incredicontrol and u can use that app to set voltages. Follow graph given by pepo . Make sure u do not set as boot first. Test for like a day and if no phone hanging or restart then u can set as boot

Freq-voltage(mV)
122-775
245-775
368-850
768-900
806-950
1 02-975
1,11-1000
1,2-1025
1,3-1050
1,4-1100
1,5-1150
1,6-1200
1,7-1250
1,8-1325
I use these for my daily use, and it seems no problem at all.
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Did anyone experience random Shutdowns or reboots after undervolting?

vklexer said:
Did anyone experience random Shutdowns or reboots after undervolting?
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Nope
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