yashsingh1/xdaforums huggingface dataset:
[Epic 4G Android Development] NetMedic:
I did a complete reinstall of everythin. Odined to eb13, got the OTA for EC05, rooted with cwm3, flashed synergy, grabbed an app from the market to make sure it stayed after flashing the new kernal and then flashed the kernal with no wipe. It seems to be working so far. The app was there, phone works and no f/c on anything yet. Is there a way I can tell if the kernal is actually there. Meaning, if I look at the Menu>Settings>About Phone, what should the kernal number be?

Gonna reinstall all of my apps, make sure they work ok and then start messing with the voltage control. Thanks for the help everyone.:)
[Epic 4G Android Development] Custodian:
That's pretty tragic bubba if you can't uv 1000mhz... have you tried uv the lower steps first, then working your way up? Try it out if you haven't

sent from azeroth.
[Epic 4G Android Development] Custodian:
Good deal bubba im happy for ya

sent from azeroth.
[Epic 4G Android Development] NetMedic:
My phone appears to work good at 1.4. OC is still in the process. Can I set 1.4 for boot without OC set yet? Just out of curiosity, what OC has worked for you and been stable?
[Epic 4G Android Development] JohnCorleone:
I know that, since you are starting fresh, you can install SETCPU real quick and press the info button. It will say team viper on the first line. Then uninstall it and add Voltage Control back. EDIT... I think it does in CPU Spy as well on the bottom
[Epic 4G Android Development] NetMedic:
totally screwed that post up. OC is good for me at 1.4. UV is still in progress. Can I OC to 1.4 for boot and leave OC at default bood until i get it right?
[Epic 4G Android Development] JohnCorleone:
That's what I am doing. My phone doesn't even like 25 undervolt so I am not undervolting at all right now
[Epic 4G Android Development] NetMedic:
I moved UV to -25 for all to see how it works. If it holds, I will try chang it again.
[Epic 4G Android Development] Custodian:
What scheduler are you using? Noop, cfq etc.....
[Epic 4G Android Development] burgerpimp07:
An update on how my undervolts have been.

I originally undervolted a **** load until I had a 'stable' setting:

1000 - 125uv

800 - 125uv

400 - 175uv

200 - 175uv

100 - 200uv

That ran for about 15 hours with no freezes or hitches using internet, gaming, pandora, texting, everything, before it froze on me, so I had to start all over again because I hadn't ran any undervolt settings for 8+ hours before.

Now I am running:

1000 - 100uv

800 - 125uv

400 - 150uv

200 - 175uv

100 - 200uv

I've been on this setting for two days. Taking a MUCH more conservative approach to it, and running it a few days straight before upping my undervolts ONE frequency at time. This is pretty close to my previous setting before it froze, so either my 400 or 1000 frequency was pushed over the limit before.
[Epic 4G Android Development] sapperpipo:
I can run 1400 fine with no problem even boots fine in 1400 battery lasts about 18 to 20 hours
[Epic 4G Android Development] ezsoulja:
I tried the 2nd settings and im running good till i just froze like 5 minutes into it.. well damn
[Epic 4G Android Development] mis3:
Really good undervolts. Unforuntately, my phone can't handle that much. I'm currently running:

1200 - 50uv

1120 - 50uv

1000 - 50uv

800 - 50uv

600 - 50uv

400 - 75uv

200 - 125uv

100 - 150uv

Been stable for a little over 24 hours with these settings. Definitely can't move 400 to -100 without freeze and can't move 600 to -75 without freeze. Next move is to bump up 800 or 1000 to -75 and see how it handles. However, my phone spends most of its time at 100 and 200 (I have 2 accounts constantly syncing about 100 emails a day), so this really isn't bad for me. I had been running this with midnight 5.1, but thinking of trying SFR 1.1
[Epic 4G Android Development] burgerpimp07:
I don't use any of the overclocked frequencies, in earlier pages somebody who was running 1.4ghz was jealous that I could undervolt so much and tried to just run 100-1000 and was able to undervolt a lot more. Also, I do not run the 600 step. There are just so many variables that affect being able to undervolt, it's hard to pinpoint reasons. Some phones just can't handle undervolts as well.

Also, I'm using the noop scheduler.

You haven't tried undervolting the 100 and 200 more?
[Epic 4G Android Development] mis3:
Haven't tried the 100 and 200 more yet. Was debating whether to work on them next or try 800 and 1000. I just haven't gotten to it yet. I may try your way and drop 600, 1120, and 1200. I kind of like having the oc speed boost though for occasional use.
[Epic 4G Android Development] konaman:
Well I've been using this since release and my phone just wont have it. I got away with UV -25 on everything for a little while but I would still get a random freeze. I've tried countless different options and they would work great for a few days then freeze again.

So I went back to setcpu and its been flawless and haven't had a problem yet and I'm getting great battery life too
[Epic 4G Android Development] yogi2010:
the following setup has survived all my personal stress tests:

1000 -50

800 -75

400 -75

200 -100

100 -125

-50 seems to be the most I can undervolt 1000 mhz and not get freeze-ups while web browsing; I might be able to bump one or two of the other frequencies a little lower. I am really curious about the variability we are seeing in different people's experiences.

edit: btw, Rodd's Genocide kernels are FAST even at 1000!
[Epic 4G Android Development] theimpaler747:
Mines about the same :)

Sent from a truly Epic phone on the XDA Premium app ;)
[Epic 4G Android Development] yogi2010:
ah cool, so I guess it's not all variablility then :)
[Epic 4G Android Development] mis3:
I'm still pushing mine a little more, but not very different at all. Seems fairly stable at

1000 -50

800 -75

400 -100

200 -125

100 -150

Burgerpimp's suggestion to drop 600, use NOOP scheduler, and drop 1200 have helped. Not sure which did it b/c I did all 3 at once. I want to give these another half day to make sure it's stable, then I'll start pushing some more.

Somewhat related question: I had constant freezes using twilight kernel included with SFR 1.1, so I switched to midnight and bonsai kernel. I thought it had to do with undervolting, but I have switched back to SFR 1.1 with genocide and undervolting above, and no freezes. Was there something else about twilight kernel that was likely causing the freezes?
[Epic 4G Android Development] burgerpimp07:
Interestingly enough running:

1000 - 100

800 - 125

400 - 150

200 - 175

100 - 200

For 3 days now with no problems. I tried disabling 1000, and 800, so it only ran:

400 - 150

200 - 175

100 - 200

and it instantly froze on me. The frequencies you have enabled may very well affect how much you can undervolt.
[Epic 4G Android Development] burgerpimp07:
To be completely honest, my phone runs as fast as I could want dropping the 600 step and no overclocking. The only real difference is undervolting(which saves battery life!) so that's what I'm trying to maximize here.

Battery draining <1% every hour on standby, which is amazing.

It's kind of hard to measure battery life while phone is being used because theres just TOO many variables, but with whatever usage I am throwing at it, I'm getting at least 20+ hours a day (my days DO start at 3:30AM, so I need my phone to last that long, or it would be dying every day lol).
[Epic 4G Android Development] MДЯCЦSДИT:
I get lockups on 1.0 ghz. Amy way to remove the default uv?
[Epic 4G Android Development] theimpaler747:
Just disable the UV in voltage control.
[Epic 4G Android Development] KennyG123:
Just flashed this on the Bonsai Beta 4.1.0 and have it running at 1.3Ghz without issue so far. Ran benchmarks a few times...seems very stable! Thank you!!!!!!!!
[Epic 4G Android Development] jbadboy2007:
There is no default uv of any frequency only what you set to be uv'ed.
[Epic 4G Android Development] bryanfritz1:
I have to say the rod deserves why more credit than all of us combined can give. I've continued using the uvs I posted a while back and this kernel has made my epic so so much of what its ment to be. Just by extending that battery life. As posted a few post back I have been seeing 20 plus hours of stand by with absolutely no restrants on regular use. I would be curious to see what full on screen test would result in. My bet is probably 6-7 hours. anyways love the work.

sent from "The Other Woman"
[Epic 4G Android Development] Anon9mouz:
That's what I was thinking hmm anyways it would be nice to have a default setting to uv at that for stock users that don't want much but want a little push to better battery or so on and the rest of us to maybe go off of to push further to make custom. Just an idea but I'm readying myself up to use VC
[Epic 4G Android Development] jbadboy2007:
I misspoke what I meant is all voltages for stock frequencies are stock voltages. Stock freqs are 100,200,400,800,1000 if you uv that means you are uv from the stock voltage.
[Epic 4G Android Development] Rodderik:
immmm baaaaccckkkkkkk :P
[Epic 4G Android Development] Custodian:
Well said bubba.

walmart
[Epic 4G Android Development] Custodian:
Bout time bubba..wb

walmart
[Epic 4G Android Development] Rodderik:
i updated the FAQ in the OP to link to your thread. I will bump the default value of 7 down to 5 on my next release. thx man
[Epic 4G Android Development] theimpaler747:
No problem. :D
[Epic 4G Android Development] epic4GEE:
Question, if my set states are; 1300,1000,800,400 and 200mhz, should I under volt the states I'm not using or just leave them be?

Side note; thanks to everyone for posting your VC states and under volts, very helpful.
[Epic 4G Android Development] Rodderik:
no need to undervolt the states that are not enabled
[Epic 4G Android Development] flyers2114:
Yes u can leave them be...

Oops sorry Rodderik...didn't scroll low enough on phone...lol

Sent from flyers Epic!
[Epic 4G Android Development] epic4GEE:
Lol....its the thought that counts.:D

Thanks fellers!!
[Epic 4G Android Development] squshy 7:
Any known scenarios thatll keep the phone from entering deep sleep while unplugged? I woke up this morning and my battery drained pretty quickly because it ran at 100mhz all night. DRM was disabled so it wasn't that...kept clearing a bunch of processes and I still couldn't get it to go to sleep. A reset took care of it tho...

The only thing that was out of the ordinary was VC was back to default settings (I can't remember myself ever rebooting and not applying my normal settings). Even setting it back to what I normally use didn't fix the problem either. Reset fixed like I said.

Just wonderin if anyone else has encountered this
[Epic 4G Android Development] mis3:
After about a dozen freezes when I tried to push further (and 3 times restoring nandroid backups), I think I'm at the best I am going to get, so I set as boot settings. Final settings are:

1200 -50

1000 -50

800 -75

400 -100

200 -125

100 -175

Battery life seems really good, but hard to check when I kept trying to push further and then needed to reboot. Thanks to all that helped, and thanks to Rod for the kernel.
[Epic 4G Android Development] Rodderik:
those are still some pretty impressive numbers :)
[Epic 4G Android Development] Blankrubber:
Started using this a couple days ago and my stable clocks are as follows:

1000mhz = -50

800mhz = -75

400mhz = -75

200mhz = -125

100mhz = -125

Only issue is when I run set cpu along with this, I get shutdowns when turning off the screen. I believe that may be due to setting my screen off frequencies to 100mhz-400mhz. Not sure the exact reason, though, as cpuspy shows I'm in the 100mhz range for most of the time anyway. Not using setcpu seems to work fine, though, and my battery life is amazing with these underclocks. I'll see how far I can push them from here and remain stable.
[Epic 4G Android Development] epic_image:
Dropping 600 has any benefits?

I can only UV 600 step by 75 and it has the same voltage of 1100mv as my 800 step.

my settings that ive been running 4 days are ..

1000 -75

800 -100

600 -75

400 -150

200 -150

100 -200
[Epic 4G Android Development] Blankrubber:
I know this wasn't directed towards me, but I messed up in my last post (right before yours). I DO have a 600mhz clock that's at -75, but I have heard from some that dropping 600mhz improves stability when adding frequencies higher than 1000mhz. Once I hit an unstable undervolt I'm going to try disabling it to see if I can go further and then perhaps try adding something higher than 1000mhz.
[Epic 4G Android Development] pauze10:
How stable are everyone's UVs when battery is low?

I had modest UVs applied, and while I was at work the phone was stable for days but I was never below 20% battery level since I was always near a charger.

Went on a trip over the weekend and suffered from freezes when my charge would drop to around 15-20% battery level.

I've been playing with my UVs to see what the culprit is and I'm thinking it might be my 200 setting, but I'm kinda curious why this would even happen. I'm willing to bet I have a bad battery too, since I've seen some wonky charging behavior a couple months ago and outside of UVing.
[Epic 4G Android Development] rmorrisonva:
I don't mind the Voodoo sound, however, the stock color profile seems just perfect to me so I am leery of using VoodooColor.
[Epic 4G Android Development] squshy 7:
Doesn't seem like too much of a surprise. Electricity is a funny thing, especially batteries, and the current that runs devices isn't an exact thing. You'd be surprised just how much things fluctuate. But that's how electronics are built; there's a certain amount of "wiggle room", and most of the voltage figures that you see are really just estimates.

As such, when our batteries drain, their output drops a little. If you're undervolting a considerable amount, you probably found your bare minimum. That'll work under ideal conditions. But with a low battery you've introduced your undervolting to a less than ideal condition. The point being, you've never tested your undervolts in an environment where the processor isn't going to get as much juice as normal. I'm speculating that the lower battery is probably "undervolting" your undervolts (not on purpose, just because its weaker). Its probably the same condition as if you had a full battery but undervolted too much and your phone freezes.

Does that make sense? (Sounds good to me lol. Someone with a little more electrical engineering knowledge could probably back me up)

Edit: heres a little example...that mV number (output capability, not total "amount" of juice) will go up as my battery charges
[Epic 4G Android Development] mis3:
I cannot even begin to explain why, but for me and a few others that have posted (ie, Burgerpimp), dropping 600 step allowed me to undervolt further. Also, using CPU spy, I noticed that my phone barely used 600mhz step anyway, so it wasn't much of a loss. Most of my use was 100 (likely background synicing of emails) on the low end, and 800 or 1000 on the higher end.
[Epic 4G Android Development] mrhocuspocus:
There are too many variables here to give you a good answer, but if you arent having problems with your phone <20% without undervolts its unlikely the crashing has anything to do with the battery. If the battery can supply the stock voltages it should have no problem supplying undervolts and the related smaller currents that the circuit request.

Most likely its something else that is changing when you apply the UV, ive ran hours of stress tests with my 200mhz -200mv setting running rock solid, but when i get into a daily situation i found it not to be stable at all.

Ive had many UV setting that were solid for days and then crashed, I had to go back and almost start from scratch.
[Epic 4G Android Development] squshy 7:
I don't know...he did say that his real world use prior to his trip was stable. I think its entirely possible he does have a *slightly* defective battery...using my explanation above, if his battery isn't able to provide the normal threshold of voltages, then when he hits around 20% capacity his batteries mV capability may be significantly less than a normal working battery a 20%....though if this is the case, then the problem wouldn't be his 200mhz undervolt step, but more likely any overclock step.

To the person who asked the question, are you running any overclocked steps? If you are, try recreating the 20% scenario without any overclock and your 200mhz undervolt at what you orginally had it.
[Epic 4G Android Development] Rodderik:
any1 interested in playing with this kernel in cm7?
[Epic 4G Android Development] mrhocuspocus:
To make this assumption, first you should have some basic knowledge about our batteries. The voltage is just a potential difference between the positive and negative terminals. It would be very poor engineering if the battery percent was measured from complete charge(regardless of voltage) to unusable state. I think the percent, is a ratio from 4.2v to the protection cutoff voltage (prolly around 3.5v I dont know off hand what samsung set this to). This is why when you pull the charger off your phone it will say 96-98% bc its not charged to 4.2v. Now if you havent made any changes to your phone and it discharges very rapidly I would assume a bad battery.

In other words his 20% should be the same as only elses. Hope this helped.
[Epic 4G Android Development] Rodderik:
int low_batt_vol = LOW_BATT_COND_VOLTAGE; // 3400mV

3.5v was a close guess :P
[Epic 4G Android Development] Custodian:
lol.....ayyyyyyy!!! Let's go!!! But what gets me.....whats so special about cm7?~
[Epic 4G Android Development] theimpaler747:
It's 2.3, no samsung crap, really fast :)
[Epic 4G Android Development] squshy 7:
Ok I see what your saying...I concede as far that theory goes lol.

Id still like to know if he has any overclocks. The fact that he used the phone for days and never got a freeze up until he finally let his phone dip to 15-20%, and apparently happened consistently in that range, seems to suggest its more than just circumstantial evidence. (I don't think any new processes would suddenly turn up because of that battery level lol). I would still recommend recreating the scenario w/o overclocks, if any
[Epic 4G Android Development] Custodian:
Oh okay I get it, so it's whats on the horizon for epic 4g?!! I see an " ALPHA " thread....only thing I had to see was " 4g wimax " not working. I'll hold on to these samsung clones in the mean time.
[Epic 4G Android Development] theimpaler747:
Yeah, it's still in heavy production, still not a lot working. But it'll be good :D
[Epic 4G Android Development] pauze10:
Thanks squshy and mrhocuspocus.

I'm not an electrical engineer, but I can't imagine battery tolerances being so bad at low charge levels that you'd get such a swing in voltages to cause instability, unless either the battery was bad or some other component is causing trouble (voltage regulator?).

The crashing was without any overclocked freqs, since that too gave me instability when using certain apps. I didn't notice much of a performance increase with OCing, so I'm just sticking to stock freqs and trying to maximize battery life. My current setup is:

1000 - 75

800 - 75

600 - default

400 - default

200 -50

100 - default
[Epic 4G Android Development] Rivas123:
Should I wipe battery stats cause I'm noticing more drain undervolted than at stock voltage. Any advice would be great, can't really search on my phone..
[Epic 4G Android Development] theimpaler747:
Check spare parts, see where your usage is.
[Epic 4G Android Development] Rivas123:
I'll do a whole days use tomorrow and report back. Just seems odd. Thanks.
[Epic 4G Android Development] theimpaler747:
No problem, let me know what you find :)
[Epic 4G Android Development] Rivas123:
So after 8 hours of my usual use I'm at 32 percent. This is really not what I get, not blaming anything its probably my own fault. That being said spare parts says the biggest hog is 1013 in network usage everything else is pretty minimal. I'm undervolted using cfq at 1000-50, 800-75, 400-125, 200-125, 100-150. Any advice? I usuallly bang out 14 hours of my usual use a day, including the use of slacker radio, browser, messaging, 2-3phone calls circa 10 min long , etc. Just wondering what I can do. Thanks a lot.
[Epic 4G Android Development] squshy 7:
Are you able to click on the 1013 in spare parts? It might give some unlike me where my biggest use is "0", hehe the root UID, which clicking on it gives me a FC of spare parts....

On a side note, I dont think this kernel is *quite* up to rods standard yet (though it's an amazing kernel nonetheless), and there are some bugs yet to be worked out...I'm also interested to see how it'll perform in it's "native" environment once the ec05 synergy comes out
[Epic 4G Android Development] Rivas123:
nope can't click it, force closes,
[Epic 4G Android Development] jbadboy2007:
Make sure you don't have gtalk set to auto sign in. mine changed itself somehow and I don't use it or ever even open it. It will drain battery very fast.
[Epic 4G Android Development] Rivas123:
I don't even have a gtalk app...
[Epic 4G Android Development] Rodderik:
i think that "0" has to do with kswapd0 which i am looking into...once you fill up memory that process kicks in and i guess has a bug that makes it freak out if it doesn't find what its looking for....i'm curious if some one with a swap partition has that problem ...anyways i'm looking into it
[Epic 4G Android Development] jbadboy2007:
Everyone has a gtalk app your phone would not work without it. Its labeled Talk. Open it then press menu for settings.
[Epic 4G Android Development] jbadboy2007:
Awesome. I think almost everyone has had this issue at one time or another. An explanation at the least would be great.
[Epic 4G Android Development] squshy 7:
...that sounds eerily similar to how rageagainstthecage works...not exactly, I just mean with the filling up of memory, and the fact that uid 0 is root level...hmmm
[Epic 4G Android Development] Rivas123:
Word, I feel like a noob. On the Hero I'm so used to seeing gtalk, thanks.
[Epic 4G Android Development] Rodderik:
nah it has to do with the system trying to push pages out of memory to maintain a certain amount of free memory for running apps and new apps...ratc purposely forks empty child processes triggering a bug adbd that restarts with root
[Epic 4G Android Development] theimpaler747:
The phone works without the gtalk app FYI ;)
[Epic 4G Android Development] Rivas123:
Really? I can just uninstall it to see if that's causing the drain?
[Epic 4G Android Development] theimpaler747:
No, I said it DOES work. One user said it wouldn't.
[Epic 4G Android Development] burgerpimp07:
I was getting 20+ hours on medium/heavy usage and 1% drain on idle for about a week with this kernel. The last two days it seems like "0" and "1013" have gone rogue and take up a **** load of network usage. Since then my battery life is terrible now even with my aggressive undervolts. Battery is draining at 3-5% on idle.
[Epic 4G Android Development] Rodderik:
yeah i'm working on it...usually a reboot will fix them for the time being
[Epic 4G Android Development] squshy 7:
Agreed...its important to monitor cpu spy, as the first indicator to me was the fact that after resetting the cpu counters, I noticed the phone was not entering deep sleep no matter how hard I tried...reset fixed it
[Epic 4G Android Development] jbadboy2007:
Isn't there some kind of limited functionality by removing it though? Like fc's or you can't make phone calls or receive texts?
[Epic 4G Android Development] somedude0608:
1013 shows as media server in droidwall, maybe that will help you narrow it down.
[Epic 4G Android Development] squshy 7:
Thats interesting because thats what uses the most of my processor time in the "system processes" category in system panel's monitor history
[Epic 4G Android Development] Bortmonkey:
Ditto on the 0 taking up network usage big time and I also took a major drop in battery life , from an easy 17 to 12 if Im careful