Database Users

[Q] [Opinions] Undervolt Settings.

First off, I would like to apologize in advance in case a thread like this exist and I can't find it.. :/ (Search is down, tried Googling) also, if anyone believes this to be in the wrong forum.
ANYWAYS! This is intended to be a preference/opinions thread centering around your OC/UC and Undervolt settings. Feel free to post your current set-up in Voltage Control (or any app of the like) and what Kernel you are running! I wanted to start this to get an idea of what everyone else is setting their UV and CPU clocks to, and possibly give a few of them a try on my own device. :]
Personally all of my clock speeds are at their defaults except for 1000Mhz @ 1200mV. (-75mV). I am also rocking Genocide v1.0 and getting a decent 30hrs of battery life with pretty moderate use.
Post away!

It is kind of pointless since every phone is different so cannot do exactly the same as others. Most can't do 1.4Ghz and most don't wake from sleep at 100 Mhz. All depends what you use your phone for. Mine runs fine at 1.3Ghz except for some TV apps will freeze.
Do you BONSAI?

kennyglass123 said:
It is kind of pointless since every phone is different so cannot do exactly the same as others. Most can't do 1.4Ghz and most don't wake from sleep at 100 Mhz. All depends what you use your phone for. Mine runs fine at 1.3Ghz except for some TV apps will freeze.
Do you BONSAI?
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Click to collapse
I believe that would be my point however.. curious as to what other people are running as far as cpu and voltage is concerned. Their success and failures. What people can get away with and remain stable. I, and others, could then try their setup (taking precautions of course; ie Nandroid backup.) And see what we get. Who knows, maybe I might adapt a set up that runs better on my device than my current one.
Sent from my SPH-D700 using XDA Premium App

Yes, every phone is different, but that is just more of a reason to collect data - perhaps a baseline can be established, which would be helpful in determining if a particular phone is messed up or just at the low end of the scale. Right now it is hard to determine if a particular phone's troubles are caused by low quality or by damaged hardware.
I keep all voltages at stock, and don't use any OC - my phone runs fine as is, and the battery life actually seemed worse with UV (and my screen felt hot with the screen UV).
Sent from my SPH-D700 using XDA App

My phone wakes from 100 but won't do 1.4ghz for even a couple seconds before reboot but 1.3ghz lasts about 20 minutes before reboot and 1.2ghz is stable. As for undervolts it can handle -25 on 1.2ghz and -50 on 1 and 1.1ghz -50 on 800mhz and that's it otherwise becomes unstable and reboots. Battery life and performance seem to meet at 800mhz with a -50 undervolt games run smooth too and 12 hours of battery. Oddly enough benchmarks are consistantly higher on 1.12ghz than on 1.2ghz I wonder if I'm the only one?
Sent from my midnight rom 5.2 genocide 1.0 epic [email protected] using xda premium app

xopher.hunter said:
My phone wakes from 100 but won't do 1.4ghz for even a couple seconds before reboot but 1.3ghz lasts about 20 minutes before reboot and 1.2ghz is stable. As for undervolts it can handle -25 on 1.2ghz and -50 on 1 and 1.1ghz -50 on 800mhz and that's it otherwise becomes unstable and reboots. Battery life and performance seem to meet at 800mhz with a -50 undervolt games run smooth too and 12 hours of battery. Oddly enough benchmarks are consistantly higher on 1.12ghz than on 1.2ghz I wonder if I'm the only one?
Sent from my midnight rom 5.2 genocide 1.0 epic [email protected] using xda premium app
Click to expand...
Click to collapse
Just to throw it out there. Aggressive undervolts will do more harm than good to your battery life. By that, I mean you'll drain your battery even more.
Sent from my SPH-D700 using XDA Premium App

I can only use Genocide kernel to get 1.3ghz at stock voltage with since all the other choices are uv'd. My last two Epics were able to handle uv'd 1.4ghz by 50mV but I'm not really complaining as I think this is a new phone they gave me and not a refurb. I currently have 100-400 uv'd by 100mV, 600-1000 uv'd by 75mV and 1300 at stock.

My phone can handle 1.4 Ghz but only with the stock voltages. If I try to touch it even by 25mV it locks up.
Who all has enabled the 100Mhz step? I noticed when I did my phone went into Deep Sleep a lot less by a noticeable amount. Staying at 100Mhz a lot.

Always interesting to hear about all this theory behind the reasons for undervolting OC and UC, then to hear about the issues (at times extreme) some have. I would also like to know who uses the 100 step and if it is noticeably better on battery life than the 200? Unfortunately I am missing out on it if I am. Still running Genocide here, but with 1.0 at -50mv 800 @ -50 and 600 @ -25. Very stable and still at 30+ battery life. Having 1.0 down 75 made me nervous. although I hear people dropping it down -100mv successfully.
Sent from my SPH-D700 using XDA Premium App

Good tip about "aggressive UnderVolting"...didn't know that actually drains your battery more. Might explain why 6 hours into my day, my battery is down to 30% already!!! I had it set at 1120Mhz UV to 1175mV (Stock = 1300)...
So now I'm going to try 1200Mhz only UV by 50...see what my battery life is after this!

Custodian said:
Just to throw it out there. Aggressive undervolts will do more harm than good to your battery life. By that, I mean you'll drain your battery even more.
Sent from my SPH-D700 using XDA Premium App
Click to expand...
Click to collapse
Can you explain how this is so? Is this based on any actual research, experimentation, or online documentation, or is this just your own opinion?
Unless your undervolt causes the CPU to hang (I've seen mine start to warm up when it's hung, until a battery pull), I don't understand how providing less voltage to the cpu will cause it to drain the battery faster.

If you change the voltage settings please don't blame the rom developers when you phone bricks...
Sent from Bonsai 7.1.3.1

I'm running Twilight Zone v 1.1.1 RC1-Hajime Taisho, Vision kernel v 1.2
SetCpu-1.450 max
-1.450 min
Quadrant-2377
Linpack-20.577
Voltage Control-1.450
Uv -100
Quadrant-2346
Linpack-21.495
I ran SetCpu, benchmarks, ran VC, benchmarks..... This Epic runs super fast, with no FC's or any other problems at all. I'm currently using VC with the uv-100. As far as excessive battery use, I have Mugen 3200 mah battery. This battery lasts all day in heavy use with no problem.
Sent from my SPH-D700 using XDA Premium App

What Kernel are you guys using on the lastest CM7?

How many .35 kernels are available? I'm only aware of Umaro's and the stock CM kernel. I'm trying to achieve better battery life, so what kernel are you guys using?
So far, using Umaro's, I'm getting regular battery life, nothing special. Haven't tried the stock CM kernel.
Are they any other undervolted kernels available?

durps said:
How many .35 kernels are available? I'm only aware of Umaro's and the stock CM kernel. I'm trying to achieve better battery life, so what kernel are you guys using?
So far, using Umaro's, I'm getting regular battery life, nothing special. Haven't tried the stock CM kernel.
Are they any other undervolted kernels available?
Click to expand...
Click to collapse
There aren't any others so far. Umaro's kernel is really good for battery life, however it's not up to date with the latest kanged nightly from yesterday.

Ahh, I see. Thanks for the info.
What cpu settings are you running?

durps said:
Ahh, I see. Thanks for the info.
What cpu settings are you running?
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Click to collapse
Right now I'm using a kanged nightly with the "stock" cpu settings of 245MHz min and 1024MHz max, but with the interactive governor. With Umaro's kernel I had at 245 min, 1017 max and the Smartass governor. The smartass is pretty good on battery.

u made all the right moves all i would do is dim screen and keep runnimg apps low.
pimped out g2

btw pyromod 2.0 345 ghz min 1405ghz max on smartass. i fully charge bout 1 a day
pimped out g2

Pershoot released his kernel the other day pretty nice and smooth
Sent from my HTC Vision using XDA App

Alright I'm sleepy so this will be in rambling form but...
I've tried Umaro's and I'm not sure if it was the undervolting (which I haven't looked into tweaking) but my phone kept stuttering no matter which governor I used. I was using Htcclay's Super CM7 1.8 with cpu set to 245/1113
I also used the stock kernel that's been on CM7 with no problems and average to good battery life (10-15 hours of active use: texting, browsing, few calls, and playing the occasional game)
Most recently I've used Pershoots which I had heard worked great. I myself love it. Almost same battery life as stock kernel but everything felt just a little bit smoother performance wise.
Here's a link to Pershoot's thread:http://forum.xda-developers.com/showthread.php?t=847672

The stock cm kernel in my opinion is finally good enough that it doesn't need changed. I have always flashed pershoots and occassionally others, but it truly does not need supplemented IMHO.
Sent from my HTC Vision using XDA Premium App

I'm using savaged zen, and I get around two days of battery on a charge, with normal use.
Min: 368 max: 768
Sent from my HTC Vision using XDA App

Using Pershoots latest kernel, have nothing but good things to say about his kernels. Always my go to kernel.

fedtemis said:
I'm using savaged zen, and I get around two days of battery on a charge, with normal use.
Min: 368 max: 768
Sent from my HTC Vision using XDA App
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You're running that on Vision? I can't seem to find it for our device.

Stock CM7 kernel here. I run 245/806 Interactive with automatic brightness. I've found that when wifi is on, keeping the cell radio @ 2G only works wonders. Wifi is set to sleep on screen off, but not when plugged in. 1 day 7 hours on this charge so far with 23% left. I would consider my use light to moderate.
HTC Vision (G2) - CM7 B95 w/AUS radio
Your is not short for you are, but you're is.|It's means it is and never ever anything else.|Pluralization by way of an apostrophe is always wrong!

durps said:
How many .35 kernels are available? I'm only aware of Umaro's and the stock CM kernel. I'm trying to achieve better battery life, so what kernel are you guys using?
So far, using Umaro's, I'm getting regular battery life, nothing special. Haven't tried the stock CM kernel.
Are they any other undervolted kernels available?
Click to expand...
Click to collapse
I'm wondering where can I download the Umaro's kernel. I check out his github (https://github.com/umaro/htc-kernel-msm7x30) only to find out that the source is available.

Savage Zen/Tiamat kernel

On CM7 I dont have ondemand governor with the tiamat or savage. Only with stock CM7 kernel. What should I use instead?
Also does it take a while to notice improve me with these kernels?
Also those with awesome battery life on stock battery are you leaving wifi on? I get about half those times but I leave 3g on all the time.
I wish I could get through an 8 hour work day with 5hrs of screen on time on my battery.
Usually on my yoobao 3000mah I get 4.5hrs on screen time with no charging throughout the day lasts about 17hrs that way.
If I switch back to my stock battery I wouldnt be getting that would I?
CM7.1 nightly
yoobao 3000mah battery
tiamat 407 kernel. Everything under volted by 50mV but I do not think it is sticking.

churro7 said:
On CM7 I dont have ondemand governor with the tiamat or savage. Only with stock CM7 kernel. What should I use instead?
Also does it take a while to notice improve me with these kernels?
Also those with awesome battery life on stock battery are you leaving wifi on? I get about half those times but I leave 3g on all the time.
I wish I could get through an 8 hour work day with 5hrs of screen on time on my battery.
Usually on my yoobao 3000mah I get 4.5hrs on screen time with no charging throughout the day lasts about 17hrs that way.
If I switch back to my stock battery I wouldnt be getting that would I?
CM7.1 nightly
yoobao 3000mah battery
tiamat 407 kernel. Everything under volted by 50mV but I do not think it is sticking.
Click to expand...
Click to collapse
i prefer the SavagedZen 2.2.1 kernel with savagedzen. but would suggest trying the smartass and interactiveX governors to see which one you and your phone prefer. some folks like the 3.06 version of Tiamat, you may want to ask folks in the tiamat thread about the diff between 4.07 and 3.06 (not positive on the version numbers).
i'd suggest running each for a couple days to see how it feels.
i use Tasker to activate my wifi when i arrive at work and at home...the rest of the time my wifi is off unless i turn it on.
the "5hrs of screen on time" may be an issue, the screen draws a lot of juice. perhaps if you verify your undervolting is sticking, used no widgets, do not use live wallpapers, set everything to sync once or twice a day you'd get further...but thats kinda no fun and i still don't think you'd get 5hrs.
i've had a light day on my phone...1.5hrs of screen on and i'm at 16hrs w/ 44% left. standard battery.

How can I verify the UV settings?
smartass is laggy

You guys should d/l System tuner. You can change your Governor with that app

Some guys swear by the SavagedZen kernel but it's reached the end of it's development life, the SavagedZen team is no longer supporting or updating the kernel and it hasn't been updated in almost 3 months. My personal experience with the kernel notwithstanding, I think that's reason enough to stick with Tiamat.

Turn brightness to 30 or 40%. Get a mugen 4500 mAh. Problem solved...your welcome.
Oh and there is ondemand in sz221. I am currently using tiamat 407 SBC conservative governor and my settings. No undervolt and working very nicely
I own a stock, gailio 2000mah, and siedio 3500. My 3500 never has a problem making a heavy day of use. I'm guessing that 4500 def wouldnt

churro7 said:
How can I verify the UV settings?
smartass is laggy
Click to expand...
Click to collapse
you can use vipermod to set and verify your uv settings. there are other apps as well. but i find the script works well.
in CM7 you can set your governor and clock speed via:
menu -> settings -> Cyanogen Settings -> Performance -> CPU Settings
no 3rd party app is required. (unless you wish to use "profiles" like those available with SetCPU)
you may find interactiveX to be more responsive.
yes, SZ is not currently being developed and tiamat just released v407.
i may try the new tiamat kernel to see if it plays nice with my phone.
note: the new tiamat is based on 2.6.38.8 and SZ is based on 2.5.38.7.
thus far my EVO has shown a definite preference for SZ over Tiamat. /shrug
i always feel like i'm carrying around a pregnant EVO when i put on the 3500mh battery. LoL

My Evo also never ran tiamat well after 337 but 407 is running great

I avg five hours display on time. I have Deck's AOSP ROM and I turn off background data and sync twitter and email manually. I use Gemini App Manager to prevent apps from auto starting. I'm using a S-Z CFS kernel interactive x governor with SBC. I rely on 3g during my commute and wifi while at work and at home. I use the web, youtube and the xda app extensively. I don't think it is possible to have five hours screen on time using 3g only. Sprint's network is not that strong.
Sent from my PC36100 using XDA App

[Q] Suggested CPU Settings

Hey awesome people. I'm just curious to what I should set my CPU at for a daily driver. I used the automatic settings and it seems like it demolishes battery life. Can you guy give me some pointers?
Thanks

Bohnsta said:
Hey awesome people. I'm just curious to what I should set my CPU at for a daily driver. I used the automatic settings and it seems like it demolishes battery life. Can you guy give me some pointers?
Thanks
Click to expand...
Click to collapse
What ROM and kernel are you currently using?

I am on a CM9 ROM with hashcode's kernel.
Sent from my Amazon Kindle Fire using XDA

if you are looking for everyday stable use i wouldnt recomend going above 1GHz and use the on demand profile. If you are really trying to get the best battery life though you can use something like setCPU to underclock your KF when the screen is off or the battery drops below a certain percentage. Just dont go too low because it seems to cause SOD issues at least for me with CM9. I currently have mine set at the stock 1008MHz high and 300MHz low and govenor: on demand with CM9 and get at least 12 hours of prety high use out of it.

thanks to both of you!
Sent from my Amazon Kindle Fire using XDA

Best Battery Life?

I have two HTC EVO 4g phones with CyanogenMod 7.2 RC1 | Tiamat_Evo-v4.1.0-sbc (CPU governor: Smartassv2 245/1152). They are also running SuperCharger v6 script for memory optimization. What I'm looking for is optimal battery life, stability, and not very much focus on performance. Already searched Google for awhile and the answers were never clear and led me nowhere.

Bump. Also need a mod to move this to Q&A.

Well you might as well underclock; no need to be over a 1152. Additionally, play with undervolting to see how much the evo can take. Keep the radios off when not needed.

I'll do some underclocking, but undervolting seems kind of sketchy. The kernels are already undervolted.

+1 for undervolting and tiamats kernels are not undervolted by default so go go vipermod lol
what kind of battery life are you getting now?

IncrediControl or vipermod? I don't know what kind of battery life I'm getting since its my parents phones. I'll try undervolting out, but just want to know if the app is safer or the script. Your only supposed to go like -50 under for both right?
Sent from my HTC One X using Tapatalk 2

Personally, I'm having fantastic battery life and performance on Swagged Out Stock N (thats the one with go launcher, and not sense), aggressive lionfish 1.8 SBC, plus using setCPU...

UnlockedNand said:
IncrediControl or vipermod? I don't know what kind of battery life I'm getting since its my parents phones. I'll try undervolting out, but just want to know if the app is safer or the script. Your only supposed to go like -50 under for both right?
Sent from my HTC One X using Tapatalk 2
Click to expand...
Click to collapse
-50 is what i usually do and never used the app but script is great has yet to fail me on an aosp rom

Angelus359 said:
Personally, I'm having fantastic battery life and performance on Swagged Out Stock N (thats the one with go launcher, and not sense), aggressive lionfish 1.8 SBC, plus using setCPU...
Click to expand...
Click to collapse
Thanks, but want to stick with well known aosp roms.
ben.nesheim said:
-50 is what i usually do and never used the app but script is great has yet to fail me on an aosp rom
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Click to collapse
Ok thanks man, yeah I ended up using vipermod -50 and underclocked the phone smartassv2 - 128/652. Working out great so far.

I'm a super heavy user and have tried all the big name roms, but none of them gave me the great combined total of speed and battery life, I get bewtween 15+ hrs other roms I got normally 6-10 nitrous Rom with underworld kernal and uv'd via vipermod using extreme mod, and still runs fast and I'm oc'd to 1.03
This is a picture of what I consider normal use, heavy I consider screen on all day, normal is like 3 hrs of Pandora text here and there played games probably for about an hour total, phone calls, surfing forums, using gps results:
Sent from my PC36100 using xda premium

teh roxxorz said:
Well you might as well underclock; no need to be over a 1152. Additionally, play with undervolting to see how much the evo can take. Keep the radios off when not needed.
Click to expand...
Click to collapse
This worked for me. Thanks

I've had a lot of bad experiences with aosp roms... GPS not working, poor data connection, and "cellular standyby" taking up an obnoxious amount of my battery... I've tried CyanogenMod and deck 1.3 with savaged Zen and tiamat kernels
Maybe I just have bad luck?

jrollercoasters said:
I'm a super heavy user and have tried all the big name roms, but none of them gave me the great combined total of speed and battery life, I get bewtween 15+ hrs other roms I got normally 6-10 nitrous Rom with underworld kernal and uv'd via vipermod using extreme mod, and still runs fast and I'm oc'd to 1.03
This is a picture of what I consider normal use, heavy I consider screen on all day, normal is like 3 hrs of Pandora text here and there played games probably for about an hour total, phone calls, surfing forums, using gps results:
Sent from my PC36100 using xda premium
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Click to collapse
The screen is what drains battery so much and yours was barely on =p