[Q]How to go under voltage? - T-Mobile Samsung Galaxy S II SGH-T989

I keep hearing people say they uv -xx number to save battery, how do you do that?

You can check the kernel thread you installed from. Usually use echo command and point to vdd_table. If you don't understand what undervolting is, you may not want to do it. It can cause issues if you undervolt too much. It can save battery life, but i would suggest using setcpu, you can find a free copy on xda, and setting profiles, like screen off, in call, etc., to lower values. I would say, stay above 300MHz for min. and clock down the max. Min are: 384-540 for screen off; 384-540 for in call. also, with some roms, you can set the main value, on the first tab, to a lower figure in the max column. I don't charge my phone everyday anymore.

Thanks for the detailed info. But I heard there's an app that does uv?

513263337 said:
Thanks for the detailed info. But I heard there's an app that does uv?
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FauxClock.Apk V.0.9
But... you need to have Bullet, Juggs or Faux's kernel for this to be useable
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Sammydr10 said:
FauxClock.Apk V.0.9
But... you need to have Bullet, Juggs or Faux's kernel for this to be useable
Sent from my SGH-T989 using xda premium
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Luckily, I do use Juggernaut.

I installed fauxclock but I don't see a way to under voltage? I only see the interface to set CPU clock. Am I missing something here?

513263337 said:
I installed fauxclock but I don't see a way to under voltage? I only see the interface to set CPU clock. Am I missing something here?
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If you swipe towards the left, you don't see a global UV window?
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skadude66 said:
If you swipe towards the left, you don't see a global UV window?
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Ah ha!!! I see!!! Thanks!!
I've used up my "thanks" for today but I'll definitely come back tomorrow.

What is the uv number I should generally set to save battery but not have the phone freeze?
If I set it to negative too much and the phone freezes, I just reboot the phone and re-set the number to a higher (less uv) value?

it's different from phone to phone, you just gotta try it out and see.. i UV mine about 100mv under stock at 1.51ghz

G1_enthusiast said:
it's different from phone to phone, you just gotta try it out and see.. i UV mine about 100mv under stock at 1.51ghz
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Mine can do 100 also

I can only go -62.5. Anything over that will freeze the phone...

How come every phone is different in this regard, does this mean my phone is "born" to consume more battery?

Thought I saw posted somewhere here not to use SetCpu on our phone? FauxClock always FC's on me. Running Jugs overclock on rooted/flashed T-Mo SGS2.

Related

SetCPU and screen not turning on...

Now I am not blaming the app I am just wondering... everynow and then, when I wake my phone up, it doesn't want to wake up or when I turn it on and try to unlock it freezes... was wondering if anyone else was getting the same thing.
Rooted using the one-click method.
Screen off setting is min 400 max 400.
Sent from my SPH-D700 using XDA App
SetCPU issues
I have been having the same issues myself. Mine was set low to 100min/max: screen off just as a test today and it did that to me a on a few seperate occasions. Not sure why, just ended up battery pulling after 10-15 seconds of no response from the phone.
The cpu is set too low on screen off, go for 245 or so
setcpu does not play nice with r phones. i had problems witth it on every kernal i played with. right now im using the mix up kernal. i used setcpu to 1.2ghz max and 100mhz min. conservative governore. i have yet to find a set up to use while the screen is locked with no issues. what i do know is galaxy s phones only like the conservative setting. maybe a 400mhz max 100mhz min with conservastive governore would work?
Make sure setcpu is set to conservative. I set my lowest to 200mhz and max at 1200. No issues here other than sometimes the notification pull down bar is laggy but it does that stock anyway.
Sent from my SPH-D700 using Tapatalk
I'll try out those settings tomorrow. Thanks guys =)
Any1 know how to get to 1.4 ghz? my max is 1.2 on setCPU and i have voodoo kernel flashed
Try this to hit 1.4.
http://forum.androidcentral.com/epic-4g-roms-hacks/36554-emergency-rom-alert-baked-snack-1-0-a.html
zetterwing said:
Try this to hit 1.4.
http://forum.androidcentral.com/epic-4g-roms-hacks/36554-emergency-rom-alert-baked-snack-1-0-a.html
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thanx dude i really appreciate it but still only 1.2 for sum reason
II5StarII Swag said:
thanx dude i really appreciate it but still only 1.2 for sum reason
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There's a kernal that allows you to hit 1.4ghz its the overclocked one from baked snacks
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mysteryemotionz said:
There's a kernal that allows you to hit 1.4ghz its the overclocked one from baked snacks
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thats the rom i switched from dude both only allowed up to 1.2ghz thanxs for replying
II5StarII Swag said:
thats the rom i switched from dude both only allowed up to 1.2ghz thanxs for replying
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The rom don't control the cpu speeds. The kernal does. You cab run any rom kernal combo you would like. In order to hit the 1.4ghz you want you need to run a kernal that is capable of doing so
Sent from my SPH-D700 using XDA App
Is SetCPU really necessary anymore? If you run a kernel that's not locked into performance mode it will scale on it's own even without SetCPU. I haven't installed it on my Epic yet and when monitoring the phone with SystemPanel I see my CPU go down to 200mhz when idle and scale up when processes are running.
Where is the kernel for 1.4? I have baked snack rom max is 1.2 i know kernel is the part that "controlls" speed but I'm stuck. Any help
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specialk0324 said:
Where is the kernel for 1.4? I have baked snack rom max is 1.2 i know kernel is the part that "controlls" speed but I'm stuck. Any help
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Last I knew it was on the baked snacks website
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Myns warm two point two and setcpu

Is it ok to use setcpu with a rom like myns warm two point two or is it not necessary?
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Certainly OK, but useful... you'll get a lot of answers. I'll say it can be
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If your happy with the way your phone is running then why mess with it? Setcpu will work with it no problems but if you want to overclock then you will need to change kernels
Sent from my Evo while i should be working
Yeah I wasn't planning on issuing for overclocking, but for underclocking when the screen is off.
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huludical said:
Yeah I wasn't planning on issuing for overclocking, but for underclocking when the screen is off.
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SetCPU is useful regardless of ROM or Kernel. The ability to select different profiles and CPU settings based on need or battery life is always nice. I would set my default to "On Demand" and max 998 min 128. Then enable profiles and set it up how you like. I perfer to drop my cpu way down while charging, wayyy down for screen off, and hero style 528 for 50% or less battery.
If you do opt for a different kernel make sure it is one that is listed in Myn's post, otherwise it will bork your Spare Parts app.
ducats said:
SetCPU is useful regardless of ROM or Kernel. The ability to select different profiles and CPU settings based on need or battery life is always nice. I would set my default to "On Demand" and max 998 min 128. Then enable profiles and set it up how you like. I perfer to drop my cpu way down while charging, wayyy down for screen off, and hero style 528 for 50% or less battery.
If you do opt for a different kernel make sure it is one that is listed in Myn's post, otherwise it will bork your Spare Parts app.
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Ok thanks for the info! I'll play with it and see if I get better battery.
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[Q] set cpu

Just bought it but I don't really get it. Both the max and the min. Are at 1.5 set on on demand but at the top it says 384 mhz (I'm guessing that's the current clock speed since I'm not doing anything) don't know which one to trust. should I set the min. at 384 ?
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Set the min at 384 and the max where ever you want. Stock is 1.5. You can underclock or overclock (if your kernel supports it). If you overclock dont check set on boot til you have played around with your phone and are sure that your phone can handle it. You can choose what ever governor works best for you. Conservative is best for battery, performance is the worst. Most people go with on demand, but your results may vary.
I've found that the smartassv2 governor gets me the best results.
But its very unstable and can cause crashes.
GreggoryD502 said:
Set the min at 384 and the max where ever you want. Stock is 1.5. You can underclock or overclock (if your kernel supports it). If you overclock dont check set on boot til you have played around with your phone and are sure that your phone can handle it. You can choose what ever governor works best for you. Conservative is best for battery, performance is the worst. Most people go with on demand, but your results may vary.
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thanks man i just dont know why it doesnt say 1.5 at the top since both the max. and the min. are at 1.5 maybe its a bug or something or maybe thats how it is
ps i hit the thanks
Try clearing the data on set CPU and then uninstalling and re -installing. If that doesn't work, but into recovery and wipe data and wipe dalvik .
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Or if that doesn't work go into your superuser app and hit menu, then preferences and update your superuser binaries. Sometimes if they are out of date it can cause issues with set CPU.
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Ok will do that
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GreggoryD502 said:
Or if that doesn't work go into your superuser app and hit menu, then preferences and update your superuser binaries. Sometimes if they are out of date it can cause issues with set CPU.
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Yup u were right just needed to update my binary su files
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glad that worked out! nothing worse then paying for an app and it not work right!

Franco Kernel Updater Questions

I'm new to the Galaxy Nexus and I'm coming from an OG Evo that I was using SetCPU with....
I wanted to see if anyone could recommend settings for the Kernel Updater...I'm looking to keep the battery going as long as possible in between charges.
also, if I use this app then I don't need to use SetCPU, correct?
no you dont need set cpu.. everything u need is within that app.
zephiK said:
no you dont need set cpu.. everything u need is within that app.
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yea that's what I figured.
any setting recommendations?
I tried a few but just wondering what others are using...
I use default and it goes pretty good
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broad_st_bully said:
yea that's what I figured.
any setting recommendations?
I tried a few but just wondering what others are using...
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Click to collapse
I personally use 192 to ~1200 MHz. With SmartReflex on (disable it if you want to do custom UV).
Play around with Generic Hotplug. It may be good for you and it may not.
I have my governor set to ondemand (it was on interactive but Franco recently changed it back to ondemand as default)
TO EVERYONE WHO USES franco.kernel updater
Please be aware that the "Turn off Thermal Throttling" feature in the latest franco.kernel updater app actually Turns on Throttling down CPU frequency when it reaches more than 70 degree C.. So just remind it that it is Vice Versa
I use ondemand governor, 384 min 1420 Max. Battery life is quite gd for me
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[Q] AOKP w/ Ktoonsez kernel CPU stuck at maximum frequency

ive been running ICS since i got my phone, the battery life was horrible until i fixed the power profile, but even after that my phone's battery was not that good. i decided to flash CM10, then i switched to AOKP, both of them are awesome, but i noticed that the battery wasnt that good either, i got the ktonnsez kernel. i tried other governors, they all stay at maximum (1512MHz) after about 5 minutes of a reboot. i tried basically everything, reflash every thing, wiped everything possible. I need help plz, i wanna enjoy my S3 without worrying about the battery dying.
its all normal when i start my phone, but after 5 minutes it just stays at maximum CPU...idk why plz help im on galaxy s3 ATT i747M...i searched everywhere but still didnt find the answer
If you flashed kt747 you need to use the ktweaker app that comes with the kernel. When you find this app you need to check the two boxes into general settings
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http://db.tt/vANjN5VP
Sent from my SGH-I747 using xda app-developers app
Have you solved this yet?
Try a different governor. Personally I use on demand and noop for the scheduler.
Make sure you don't have any other overclocking programs which may be conflicting. I used to use SetCPU but with the toonz kernel I get Ktweaker. So I got rid of SetCPU.
Funny yours is locking at maximum. Mine used to lock at 96Mhz and run like crap. The above method worked for me. Don't forget to make sure your running the most updated kernel, wipe cache/dalvik/fix permissions.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
liltitiz said:
If you flashed kt747 you need to use the ktweaker app that comes with the kernel. When you find this app you need to check the two boxes into general settings
Sent from my SGH-I747 using xda app-developers app
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Tyvm, i did what u told me and its working for now, i was using ktweaker the whole time, but i like to check my current speed in ROM control, idk why maybe cuz the numbers are bigger? ;P im still not sure if its going to work for a long time, i did a reflash yesterday, i charged my phone at 100 percent last night, and it was sitting on low frequency, when i woke up, i was suprised to see a 6% drop of the battery, leaving me 94% left. but the speed was at 1512. and cell standby was using most of the battery.
g2tegg said:
Have you solved this yet?
Try a different governor. Personally I use on demand and noop for the scheduler.
Make sure you don't have any other overclocking programs which may be conflicting. I used to use SetCPU but with the toonz kernel I get Ktweaker. So I got rid of SetCPU.
Funny yours is locking at maximum. Mine used to lock at 96Mhz and run like crap. The above method worked for me. Don't forget to make sure your running the most updated kernel, wipe cache/dalvik/fix permissions.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
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TY, ive tried switching governors before and it didnt work. But when i tried this morning, it worked... really strange.
Idk if it will last long, my phone likes to jump around from normal to maximum without me even touching the phone
Use ktweaker instead of the rom settings. Go to the performance section in settings and disable set on boot. Then, go to ktweaker and set as "apply settings immediately after boot". Once you're done, set to whatever you want it to be.
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