yashsingh1/xdaforums huggingface dataset:
[Epic 4G Android Development] burgerpimp07:
I'm running this right now. Would be very interested in what other people have their undervolt settings set at.
[Epic 4G Android Development] Rodderik:
turn the phone off completely and wait a minute...then with it off when you plug in the usb cable does the green battery pop up with the white dots moving?
[Epic 4G Android Development] yogi2010:
@burgerpimp07: i have a pretty similar setup-

1200 -25

1000 -100

800 -100

400 -100

200 -100

100 -100

so far no problems, except one freeze-up on shutting down. i seem to lose almost no battery when the phone is asleep. maybe i'll bump the lower ones up to 125 UV later.
[Epic 4G Android Development] diptenkrom:
when plugged in to the usb of computer, yes it does, but not to the wall.
[Epic 4G Android Development] JohnCorleone:
1400:no undervolt

800: -50

600: -50

400: -50

200: -25

Everything seems stable finally. It uses 1400 only when I need it and no freezes right now.
[Epic 4G Android Development] burgerpimp07:
Good ****, my phone runs great with the 100, 200, 400 steps @ 125 UV.

I'm actually considering trying 100, and 200 @ 150 UV soon and go from there. Some of my higher clocks don't like 125 UV for sure, but the lower ones do fine.
[Epic 4G Android Development] yogi2010:
nice! let's see how low we can push these voltages :D
[Epic 4G Android Development] burgerpimp07:
1000 - 100uv

800 - 100uv

600 - 100uv

400 - 125uv

200 - 150uv

100 - 150uv

I will run some benchmarks, let it sit with screen off for a while, and report back in a bit. :)
[Epic 4G Android Development] yogi2010:
weren't you the one who suggested looking up our favorite DI18 kernels, and their voltage tables? i thought that was a great idea, and i tried but couldn't really find the info.... I was looking at the Mixup kernel on github. but i think the testing we are doing will give us a really good idea of how to set it up for max. battery.
[Epic 4G Android Development] burgerpimp07:
Yeah, but I think this method is better because phones will vary from device to device. This definitely beats having multiple kernels with different preset voltages as it is fully customizable to your specific epic.

Btw, I ran each benchmark twice (with the undervolts you quoted), phone is good so far, even when waking from sleep. Will probably leave it at this for a while to make sure it is 100% stable.
[Epic 4G Android Development] yogi2010:
yeah, this kernel is the most fun for sure! i've been running my setup for a while, the only problem i saw was 1 freeze-up on shutdown. let us know if you bump it down to 150, lol. i might try 125 soon, but i think maybe that froze up my particular phone. then again, i also had 1200 UVed by 50.
[Epic 4G Android Development] burgerpimp07:
I did, look at the undervolts you quoted at the top of the page.

It seems that it might be harder to undervolt the overclocked frequencies. Try lowering the undervolts, I run max at 1000 btw, so I don't even mess with the higher frequencies.

(were spamming the hell out of this thread haha)

Also, I'm going on the assumption that you can undervolt 100MHz and 200MHz the same amount because stock, they both come at 950mV. Running them -150uv with no problems right now!
[Epic 4G Android Development] yogi2010:
ok yeah, I got what you mean now, my bad. that's cool that it's working for you so far!
[Epic 4G Android Development] Rodderik:
it's on topic so i don't mind :)
[Epic 4G Android Development] yogi2010:
thanks for letting us have fun, and hopefully it's helping others, at least with figuring out the undervolting :)
[Epic 4G Android Development] Rodderik:
i doubt charging is kernel related because i havent touched anything related to that but i am curious....

since the charging animation works with the phone off, it doesn't charge hooked to the computer?
[Epic 4G Android Development] burgerpimp07:
After running it for an hour, I ran benchmarks about 15-20 times, let it sleep with screen off for at least 10+ mins, and made a few phone calls. I decided it was stable enough haha so I undervolted some more. This proves that you can undervolt the lower frequencies more than the higher ones. I wasn't able to stably run 125uv across the board without freezes but ran 100, and 200 steps @ 150uv fine.

Update:

1000 - 100uv

800 - 100uv

600 - 100uv

400 - 125uv

200 - 175uv

100 - 175uv

will report back any issues or freezes
[Epic 4G Android Development] epic4GEE:
Its helping me, I'm not using this kernel at the moment, but only because I felt VC or lack of knowledge for setting it up caused alot of problems. Now I watch and learn:D
[Epic 4G Android Development] diptenkrom:
it works when hooked to computer, on or off, but not to wall. it did work before. but the kernel and a boot ani is all that i have done, other than removing stock apps.
[Epic 4G Android Development] jbadboy2007:
I've had 20 freezes with only 1 data corruption after the 2nd freeze. A trick that I'm doing that might be helping with not getting data corruption is after battery pull when I'm booting I hold the power button till the capacative lights turn on. Its either luck or holding the power button to boot up does something. Idk.
[Epic 4G Android Development] Rodderik:
sounds like your wall adapter isnt working then
[Epic 4G Android Development] burgerpimp07:
What do you have it undervolted at?
[Epic 4G Android Development] burgerpimp07:
This is running great. No issues so far. I tried getting a little bold and set 100, 200 steps at -200uv and it instantly froze, haha, so I just returned it to this setting. I'm going to start exploring 400,600,800, and 1000 undervolt limits now.

ALSO,

Maybe somebody can shed some light on what the different schedulers do. I am running noop, and haven't ventured into anything else.
[Epic 4G Android Development] yogi2010:
nice! I had a freeze-up or two, so I switched to no undervolt at 1200. gonna experiment more.

the VC app says the scheduler won't proobably have much impact on performance.... I don't know myself.
[Epic 4G Android Development] diptenkrom:
Charges my wife's phone just fine..

Edit: charged hers in between testing mine, but now it won't. The cord was messed up though cause it won't charge either now.

Sorry for the false alarm, and thanks for helping me figure out my problem.

Sent from stock EC05 with Genocide 0.5a
[Epic 4G Android Development] burgerpimp07:
Im about to head out for the day and wont mess with VC, So it will be a real test of stability on the undervolting.

I'm currently at:

1000 - 100uv

800 - 125uv

600 - 125uv

400 - 150uv

200 - 175uv

100 - 175uv

Been running smooth for 30ish minutes now even after benchmarkin 5-6 times (sb 2010,2011,quadrant, and linpak) but I have a feeling I over did it a little bit. I will see if I get any freezes with this setup, I'll report back either later on tonight or tomorrow.
[Epic 4G Android Development] JohnCorleone:
@yogi2010&burgerpimp: Thanks for posting all of the different setups you are trying. You helped me figure out to leave the highest state alone and I am getting some good undervolt at 800,600,400 and 200. Keep it up guys.
[Epic 4G Android Development] theimpaler747:
That's pretty crazy. I only get −50s
[Epic 4G Android Development] XxLostSoulxX:
I know this is unrelated but on vision kernel today before i left home phone was 90% Full. I left @ 1:30pm and got home around 6:00pm and phone only dropped 1%. Mainly the screen was off but i did do a few things. if i was running this i would have dropped anywhere from 10-30%
[Epic 4G Android Development] burgerpimp07:
I agree with JohnCorleone, don't undervolt the higher frequencies too much and set aggressive undervolts to the lower frequencies. I'm sure you can get a better undervolt than 50uv.

*EDIT*

My phone didn't like that too much lol. I just returned the 600 and 800 undervolts to 100uv.
[Epic 4G Android Development] theimpaler747:
We'll see, these phones are different and react differently :)
[Epic 4G Android Development] JohnCorleone:
Me too. 50s are where I seem to get the most stability
[Epic 4G Android Development] burgerpimp07:
Even with the lower freq? Try leaving the higher ones alone and raise the lower freq above 50.
[Epic 4G Android Development] JohnCorleone:
I wonder if there's a connection between being able to run at 1400 and not being to undervolt as much. Impaler, are you stable at 1400?
[Epic 4G Android Development] burgerpimp07:
If it means anything, I am stable at 1400. Never had any issue running at any high speed, I just prefer battery savings and run it max 1000MHz.
[Epic 4G Android Development] JohnCorleone:
If I go below 50, I get the occasional lockup when pressing the power button to lock screen
[Epic 4G Android Development] Custodian:
It isnt possible to run 1400 undervolted beyond -50 im afraid.
[Epic 4G Android Development] JohnCorleone:
Damn, it seems like every phone is unique. I haven't seen a setup that accommodates everyone yet unless the undervolt is slight
[Epic 4G Android Development] Rodderik:
im willing to bet the actual power drain is very similar in both kernels...it seems the battery reporting on these phones have been crazy for a long time plus there are SOOOO many factors that could play into how much battery life is used...signal, TWS, weather, apps running, actual charge on the battery, enabled/disabled features, widgets, etc etc....i could keep going but my point is that there isn't a fair comparison for battery usage based off 2 kernels alone...even with 2 epics duct taped together and ensuring they are setup the exact same minus a kernel difference will have skewed results
[Epic 4G Android Development] Rodderik:
that is the exact reason i haven't posted any pre-defined undervolts yet
[Epic 4G Android Development] theimpaler747:
Yeah, I am.
[Epic 4G Android Development] konaman:
Hey rodderik, I've been at work basically since the release of this kernal (i work weekend nights) so I haven't had time to read through every post to c if this is posted. So I was wondering what the the scheduler settings stand for in VC? Like what each of them mean.

Thanks a bunch!
[Epic 4G Android Development] Rodderik:
honestly i can't tell you 100% that changing them makes a difference right now but if you want to learn about them check out: http://www.wlug.org.nz/LinuxIoScheduler

gives a pretty good explanation...if some people want to test and see if they can tell a difference then by all means educate me...the only one i've used is cfq
[Epic 4G Android Development] Custodian:
Rodd the op in that post stated using cfq for multi systems to spread the resources equally.....and that deadline would yield the best performance.
[Epic 4G Android Development] keithkevorkian:
The insight from everyone has been very helpful. Ive been stable all day. Sb2010 1696-3762 linpack 19 and some change everytime and quadrant consistently at 2100 im running

1400-25

800-50

600-50

400-50

200-25

so far no problems at all. Thanks again to everyone posting
[Epic 4G Android Development] Rodderik:
multiuser systems

it also says "As of the 2.6.18 kernel, this is the default scheduler in kernel.org releases." referring to CFQ
[Epic 4G Android Development] Custodian:
Well I just switched to deadline and noticed a difference in performance instantly...so im guessing this will be a drainer on the battery....let the testing begin
[Epic 4G Android Development] JohnCorleone:
Did anyone get a Scheduler popup message on boot?

QUOTE: What is A Scheduler?

"This item allows you to select a way to organize an I/O (input/output) queue. Suggested: Noop(simplest, less overhead) or BFQ. CFQ is not supported on this kernel and doesn't have a large impact on performance." I got this popup message twice and don't know how I did it.
[Epic 4G Android Development] Rodderik:
nope i don't think i've ever seen that
[Epic 4G Android Development] JohnCorleone:
Yeah, all the times I uninstalled and installed it again I got it twice. Needless to say, I am trying "Noop" now with my same undervolt settings. I am glad I wrote it down the second time I saw it.
[Epic 4G Android Development] yogi2010:
well, i'm gonna go out on a little bit of a limb and say that i've found a good setup for my phone.... seemingly stable, fast, and excellent battery life:

1200 Mhz -0

1000 Mhz -100

800 Mhz -100

400 Mhz -100

200 Mhz -125

100 Mhz -125

using the 'anticipatory' scheduler, sorta based on what i read in the link, but mainly just experimenting. getting closer to saving as boot settings, especially with the undervolt schedule. not sure if this will work for everyone, and burgerpimp seems to do ok with even more undervolting on 100 and 200(mine froze instantly at -150).

edit: ran Smartbench 2010, got 1431/3073. watched several Youtube videos. no problems with anything for several hours! thx to Rodd for giving us this kernel!
[Epic 4G Android Development] Rodderik:
every one should take notes at how much time you guys are spending to find out what it stable....it is not a 5 minute deal and done
[Epic 4G Android Development] JohnCorleone:
Well thank you for being emphatic about not using "set on boot" too quickly and taking time to do thorough testing in your instructions.
[Epic 4G Android Development] yogi2010:
yeah, and it will probably be different for everyone. I can say it's worth the time tho. this was the new thing I think we all needed... or at least that I needed. thx to Rodd for making this kernel!
[Epic 4G Android Development] makipsee:
indeed this will now show the people how much time does have 2 go into making a kernel thats stable for everyone

as always u the man rodd!!
[Epic 4G Android Development] bryanfritz1:
Just thought I would share my results after a few hours of undervolts. Granted my phonr loves 1400mhz and 100mhz here are my results so far

edit: you can't see with the previews but 100mhz is undervolted by 100mv

sent from "The Other Woman"
[Epic 4G Android Development] Rodderik:
^^ nice!!!
[Epic 4G Android Development] 1greek4u:
After a couple days of tinkering here's what I'm running:

1300mhz: -25

1120mhz: -50

1000mhz: -75

800mhz: -75

600mhz: -75

400mhz: -75

200mhz: -50

I think I'm pretty happy with this. I was pulling my hair out over whether or not I wanted to run 1.4ghz but finally decided on this. Seems 100% stable thus far.
[Epic 4G Android Development] burgerpimp07:
Have you tried undervolting the 400 or 800 anymore than 100uv or did you just stop when you couldn't go passed 125uv with 100 and 200? I would give it a try. Also, is there a noticable difference between 1000 and 1200? Since I deleted the 600 step, I've been consdering adding 1200, but I'm super paranoid about my battery life lol.

I seemed to have found my setting too, at least so far with no freezes. I am only running 100, 200, 400, 800, and 1000 now. For some reason I can undervolt 800 125uv but can't undervolt 600 more than 100uv without it freezing after a few minutes, so I just deleted the step. Here are my undervolts:

1000 - 100uv

800 - 125uv

400 - 150uv

200 - 175uv

100 - 175uv

I haven't tried going further with the 400, 800 or 1000 step so I might try more tomorrow, but I highly doubt I can undervolt any more. The only confirmed freezes/limits so far are with 600 @ 125uv or greater (freezes after a few mins) and 100,200 @ 200uv (freezes instantly). As far as stabiliy, I've been running this setup for a little over 5 hours. Ran benchmarks a **** load of times, web browsing, gaming, navigation, calls, you name it. Also. It sat in my pocket for almost 2 hours during church, and woke up just fine. That's 5 hours with just this setting lol, I have been messing with undervolts all day non stop since early this morning.

With that said, I am still hesitant to set it on boot, and will run it for a few days with whatever setting I think is perfect before saving the settings to boot.

*edit*

Also I forgot to mention I am running noop scheduler. I really don't know what the differences are, that one came as default, so that's what I am sticking to untill I read otherwise. That might make a difference in my undervolts, I dunno.
[Epic 4G Android Development] Kitteh298:
Hey I need some help I was running the .4a that you released second probably. And now I upgraded to te voodoo sound .4 and now my wired tether doesn't work. It was a huge dissapointment at the library when my computer wuldnt work on wifi but my phone would.. help? :3 would doing 1.0 fix this?

From My Samsung Epic Using TapaTalk.
[Epic 4G Android Development] Rodderik:
i haven't had any problems with wired tether on any of my builds...i used wired tether on 1.0 the other day just fine too
[Epic 4G Android Development] dchawk81:
Clear the app data so the binaries can reconfigure.
[Epic 4G Android Development] yogi2010:
@burgerpimp: glad that's working for you, you must be getting some stellar battery life! i know i am, even at my undervolts. yes, the speed difference is noticeable when going up to 1200, but i am having freeze-ups when web browsing, using many different browsers, so i've backed it off to 1120 to see if that fixes that problem. once i get that stable then yes, i will try to increase the 400 and 800 undervolts.

anyway, glad to hear back from you, and let us know your battery life, i'm curious to know :)
[Epic 4G Android Development] tbob18:
Great kernel! After many crashes and benchmark runs, my final settings are:

1.4ghz -75

1.2ghz -75

1.0ghz -150

800mhz -125

400mhz -150

200mhz -175

100mhz -200

So far so good!

I'm sure battery life will be greatly improved, great work Rodderik. :D

We'll see how stable it is after a few days in. Letting StabilityTest run for 10min on each frequency separately seemed to work fairly good to work out which voltages were stable and which were not (causing a crash). (similar to using Orthos/Prime95 along side RightMark CPU Clock on notebooks when undervolting)
[Epic 4G Android Development] herzzreh:
Guys, any way to dl this directly to the phone? I'm getting the content not supported error...
[Epic 4G Android Development] globalninja:
This kernel is awesome...I undervolted a good amount and it seems to have increased my battery life significantly. VERY heavy use and I am at 60% by the end of the day, or my battery meter is decieving me.

Awesome
[Epic 4G Android Development] yogi2010:
i actually just downloaded it after reading this....using Tapatalk app, clicked the link, and selected Miren Browser. if you're using a different browser, perhaps give Miren a try?
[Epic 4G Android Development] Custodian:
Download Astro from the market. Open it. Press the menu button. Goto preferences. Scroll to the bottom and enable download any file type.
[Epic 4G Android Development] Rodderik:
^^ what he said
[Epic 4G Android Development] Kitteh298:
I did that already, its directly related to updating.
[Epic 4G Android Development] Rodderik:
update the kernel (if you want), uninstall both wired and wireless tether, install this wired tether http://dl.dropbox.com/u/7514207/wired-tether-1.4-epic-4.apk and if you need wireless tether download it from the market (not from sdcard or google page)
[Epic 4G Android Development] burgerpimp07:
Running:

1000 - 125uv

800 - 125uv

400 - 175uv

200 - 175uv

100 - 175uv

For the last 5 hours. Ran a **** load of benchmarks, small amount of browsing and wordfeud and plenty of texting. Down 19%. Not bad...
[Epic 4G Android Development] herzzreh:
This is nuts... I get an instant lock up at anything over 50!
[Epic 4G Android Development] k0nane:
And that's why UV is user-configurable. ;) Some people just can't handle low levels.
[Epic 4G Android Development] herzzreh:
Just very jealous...
[Epic 4G Android Development] JohnCorleone:
Hey, you aren't the only one. 50 is max for me too. I actually can only do 25 at 400 and 200...strange. I thought I could go higher on lower states
[Epic 4G Android Development] k0nane:
John, you disappear from IRC far too quickly.
[Epic 4G Android Development] Tirregius:
I'm not too stoked with how voltage control throttles. With multiple frequencies selected, I observe less stable framerates in some 3d applications. Didn't have that issue with setcpu. I think my best battery life was VC though. I get close to zero drain when phone sleeps.
[Epic 4G Android Development] JohnCorleone:
I am using AndChat that constantly freezes on me. I will hop back in there at 12:45 PST
[Epic 4G Android Development] JohnCorleone:
I can't agree with you more. The throttling with SETCPU is better for me too. I do get a little bit better battery with Voltage Control but overall stability was better with SETCPU for me. I seem to constantly make adjustments based on which apps I am using at that time
[Epic 4G Android Development] burgerpimp07:
Research into looking for a different scheduler with voltage control. That might fix your problem.
[Epic 4G Android Development] jbadboy2007:
Someone should write an app that contains evrything from vc and setcpu? This is android. I would just don't have the time to write and test.
[Epic 4G Android Development] Custodian:
@rodd..does your battery charge to 100%....my **** charges to 96% then the blue light comes on..then I have to keep unpluggin and repluggin to get it to 100%...lol..ive calibrated a batt many times and never had this problem...
[Epic 4G Android Development] jbadboy2007:
Imo batteries don't reach 100% if they have been discharged too much. I have bumped charged after not getting 100 then it seemed to get to 100 by itself after
[Epic 4G Android Development] JohnCorleone:
My battery charges to 100% on my external charger but not with my phone
[Epic 4G Android Development] Custodian:
Yea some crazy **** though....i charge my **** to 100% ..turn it off...then it doesnt wanna boot...lol
[Epic 4G Android Development] vocaltreat:
Mine is the same way at least for the best stability...any more and it will start to freeze every once in a while. :-)
[Epic 4G Android Development] Rodderik:
95-100% = happy battery
[Epic 4G Android Development] epic_image:
download link isnt working for me..
[Epic 4G Android Development] squshy 7:
Whoa.....a real live girl on xda...

Ill alert the nerds...
[Epic 4G Android Development] JohnCorleone:
Vocal's in trouble now!!!!
[Epic 4G Android Development] burgerpimp07:
I think I found my niche. I am at:

1000 - 125uv

800 - 125uv

400 - 175uv

200 - 175uv

100 - 200uv

I dropped the 600 step because I couldn't get passed 100uv without it freezing and I've been reading that maybe less steps is better. I have tested all these undervolts. If I raise any frequency any more it will freeze my phone in 5-10 minutes. I am running this setup for almost 5 hours straight with no glitches.
[Epic 4G Android Development] Rodderik:
-200mV at 100 is crazy...nice setup

600mhz you cant relate undervolts to the other b/c the voltage was a best guess as it is not a stock clocked speed
[Epic 4G Android Development] burgerpimp07:
Interestingly enough if I run 600 at the lowest stable undervolt (100uv) it has the exact same voltage as my stable 800 which is 1075mV.
[Epic 4G Android Development] JohnCorleone:
Interesting. These are the same states SetCPU uses...without the undervolt. Going to try this out. Without as much undervolt though :(
[Epic 4G Android Development] tbob18:
I noticed this too, so I also dropped 600mhz.
[Epic 4G Android Development] evilsock:
it says any rom but stock yada yada, i am stock but im rfs NOT ext4, so can i flash the 1.0 in second post?
[Epic 4G Android Development] dchawk81:
I run 200 (50), 400 (50), 800 (75), and 1200 (25).

I'm stable but I'm not sure my battery life is actually better than if I wasn't undervolting at all. I can't go any lower without issues, and I'm definitely slower. It likes 200mhz.
[Epic 4G Android Development] Rodderik:
yes rfs is fine
[Epic 4G Android Development] jbadboy2007:
I think you should put back 1000mhz step
[Epic 4G Android Development] dchawk81:
Me? I'm trying that now, with 1200 disabled...ie no overclocking.
[Epic 4G Android Development] vocaltreat:
hhahaha

hahahahaha....please dont squshy....j/k hey dude there are "nerdy" girls out there haaaaaa....there just not as "vocal" as me lol :p

Oh and john...shaaaaaaaaadup hahaha.;)
[Epic 4G Android Development] dchawk81:
You have nothing to worry about. Nerdz would rather hackorz their phone than get laidz.