Database Users

KA7 Kernel Under-Clocked?

So I have tried several Kernels over the last 6 months or so. I did not always have SetCPU on my Vibrant so never noticed what the Minimum clock speed was on most Kernels. I recently test drove the new DOW kernel and installed SetCPU to mess around with OC. I went back to what was my daily driver kernel KA7 W/Voodoo. Then I noticed KA7's minimum clock speed was set at 100 MHz?
I have read that some phones have a hard time waking up at 100 MHz. KA7 has been the best performing kernel I have used to date. Battery life has been amazing and never had a wake issue. Is this just a similar situation with OC kernels some processors can run at a lower clock speed then others and also is it normal for the stock kernels to have a minimum clock speed of 100MHz?
Thanks in advance for any info on this subject...

Yes it is normal.
OC Kernels work differently. Some will allow 100Mhz. Others have problems with 100Mhz and can only go down to 200Mhz. It's about the same thing as far as you and your phone are concerned. You won't notice it and neither will your battery.

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

Quest for the best battery life.

Day 1:
Flashed Simple and Clean v1.3
2.6.35.7 speedmod test3 k2 kernel
Juice Defender Ultimate in Agressive mode.
Batterylife: 11 hours. Lost most of the life when the phone and I were both asleep during the night. It went down from 100 to 38%...
PS: If anyone wants to give me their set up so I don't have to spend so long on this quest, that would be appreciated...

There are 2 more threads with the same topic, with much more info. Also, we know nothing about how you use your phone, except that you have huge wakelocks. Not really helpful tbh.

care to point out those threads for me?

convolution said:
care to point out those threads for me?
Click to expand...
Click to collapse
you could actually use the search function
PS - Ditch Juice Defender it uses up as much battery as it saves, trust me this is fact.

I did. I tried some of the solutions posted in some threads like using speedmod + clean n simple, and also lightning v6.1 and ninphetamine kernel; doesn't work.

I used to have the Galaxy S Vibrant before I got the S2. I swore by Juice Defender. I would get on average 45-60% more battery depending on usage (phone was rooted with OCLF installed). My S2 gets an additional 2-3% more life while running juice defender. Takes more than that to run it. My opinion, remove the app.
I am running sensation 1.9 rom and hardcore speedmod kernel. I work oh average 11 hours a day. Phone isn't used much during that time. Wifi is always on and by the end of my shift, it's at 94% or so.
When I get home, my phone is put through some heavy use. Facebook, youtube, texting galore and internet browsing. I always have 25-30% battery left at the bare minimum written I go to bed at 6-8 hours later.
In my personal opinion, this rom and kernel combination give me the best power (4700 on quadrant), best options (configuration got nearly anything) and best battery life (phone lasts all day with ease). I would recommend this to anyone in a heartbeat.
-Chris
Sent from my GT-I9100 using XDA App

I'd recommend the Hyperdroid rom. A lot of users (including myself) have hit 5 hours screen on time (most I've seen is 7 hours). Phone can easily last a whole day, just need to check for wakelocks using BBS. 60% overnight is ridiculous lol, you should really be losing 1% every 4-5 at least unless you have loads of people ringing you all night
My setup
Rom: Hyperdroid 2.9.0
Kernal: TWD2.5
UV with voltage control
200mhz - 1200mhz
Sio I/O - Lulzactive governer
Max Screen On Time - 5 Hours 28 Mins
Facebook/Whatsapp Syncing

Read the guide i posted yesterday, its a bit long, but will definately save you battery life.
http://forum.xda-developers.com/showthread.php?t=1351663
Also my setup is in my sig - very fast, very slick and above all great battery life (range between 20hrs and 28hrs moderate use)

I read the long thread. It has some points in there I didn't know about.
Will try HyperDroid Rom.
Tried Sensation. Battery life failed for me with that ROM. Will try it againwith speedmod kernel if HyperDroid doesn't work...
btw, what governor is the best for Hyperdroid?

i use
check/leo rom v 3.1.1
siyah kernel 2.2 beta6
ice cream sandwich theme
the kernel is set at smartass v2 governor
1.4ghz - 1300mv
1.2ghz - 1275mv
1ghz - 1150mv
800mhz - 1050mv
500mhz - 950mv
200mhz -900mv
100mhz - 875mv
my sgs2 doesnt like undervolting so them settings should be safe to use on most sgs2 handsets
i then have the following profiles
screen off 100mhz -- 200mhz
charging 100mhz -- 500mhz
in call 100mhz -- 500mhz
battery at 60% set cpu to 100mhz -- 1ghz
battery at 30% set cpu to 100mhz -- 800mhz
battery at 15% set cpu tp 100mhz -- 500mhz
getting excellent battery life with my sgs2
ive also frozen any apps i dont use via titanium and used a start up manager to stop certain programs starting at boot
i used to use juice defender but on the sgs2 it doesnt seem to wrk as well at all
i was getting wakelocks from facebook chat draining my battery so i have installed an app to auto close that when the screen goes off and that has saved me more battery and kept wakelocks down
as other users have said its all about how you use your phone , the settings above might be useless if you have lots of background tasks going on as a screen off profile off 100mhz -- 200mhz may not have enough power to do your background tasks however when my screen is off i want my phone to go to deep sleep and not consume power etc so a very low screen off profile suits my needs as does a low charging profile as i dont use my phone on charge and 500mhz max power suffices my needs for when the phone is charging
same goes for setting a battery % profile i know when my battery is at 15% i wont be playing high end 3d games so it makes sense for me to try and save battery and limit the cpu to 500mhz at that battery percentage but other users may want full power all the way till their battery dies , it all depends on what you want and do with your device

Day whatever:
Used Hyperdroid ROM: Battery Life is AMAZING!
Using their 2.5 TW kernel as well...
The first thing I did was restore all my apps with Titanium Backup, but then I got crappy battery life, so I reflashed the ROM but this time, I didn't restore any apps.
I got amazing battery life!
So it was an APP's fault!

yeah sometimes apps are rogue. Hyperdroid has an awesome kernal though, someones just hit over 8 hours screen on time with stock battery which is amazing. betterbatterystats would show you apps that are causing wakelock problems. I do use some app called gemini just so I can stop apps loading from boot (haven't been bothered to search for autostart apps). Fresh wipe is good sometimes though, fresh and clean is the way to go unless your upgrading from the same line of roms

DramatikBeats said:
yeah sometimes apps are rogue. Hyperdroid has an awesome kernal though, someones just hit over 8 hours screen on time with stock battery which is amazing. betterbatterystats would show you apps that are causing wakelock problems. I do use some app called gemini just so I can stop apps loading from boot (haven't been bothered to search for autostart apps). Fresh wipe is good sometimes though, fresh and clean is the way to go unless your upgrading from the same line of roms
Click to expand...
Click to collapse
DB i manage minimum screen on time with rom/kernel combo over 5hrs.....and it saved me money from getting a extended battery. why you think i aint been back on foxy yet...and even though i love raffaeles work (foxy and androidmeda is the top two) for me its all about battery life and that one has done it for me nxt stop though is ICS

Perfect Atrix/

Let's all collect our phone specs in one thread and try to make a super build.
Make a list in the form of
ROM:
Kernel:
Radio:
Extra performance or battery enhancing applications(if any):
Quadrant score on average:
Battery life on average:
Click to expand...
Click to collapse
Maybe by sharing these information we could help each other improve our phones
Mine:
ROM:CM7 Ba2tf
Kernel:Clemsyn's faux modified kernel elite 1.4
Radio:
Extra performance or battery enhancing applications(if any):CPU Tuner for OC
Quadrant score on average:4200
Battery life on average:21hours on normal usage with lower settings(sadly)

ROM: CM7 Ba2tf (Haven't tried Weekly #3, waiting for another Stable release)
Kernel: faux123's Stock Enhanced Kernel 0.2.2
Radio: N_01.77.36P
Extra performance or battery enhancing applications(if any): SetCPU undervolted (-75 -50 -100 -150 -200 -275 -350) with screen off and battery temp profiles.
Quadrant score on average: Not sure, haven't benchmarked in a while.
Battery life on average: About 30 hours with 4.5 hours with screen on, Wi-Fi on about half of the time, 30 minutes of calls (sometimes like 4 hours but it dies a lot faster), 300 texts a day average (send/receive), Facebook, XDA, and Browsing over 3G and Wi-Fi. Sometimes I get about 40 hours with 5.5 hours with the screen on but that's all just texting and fooling around, no using 3G which is a battery hog. I have background data and auto-sync disable which helps with the battery life a little bit. If anyone has similar or better I'm interested in how they did it. I'd say my phone gets pretty good battery life but better would be nice.

battery drooping fast

Hello I have my nexus 4 two months and my battery is not impressive at all. I read here people that in heavy use it hold 8 hours. Yesterday at work shift I only surfing internet 2 hours and after 6 hours the battery drained and phone shut down.
I use cynongen 4.2.2 and my kernel is Franco r110 any suggestions or the battery has defect and I need to replace it?

What's your kernel settings? There are multiple things that could lead to poor battery life. What's your phone setup like? If you have brightness on high, plus a lot of things auto syncing in the background. Gps on when not in use. Etc etc

Seems like your data signal is very weak.

GPS is off brightness is on auto kernel set tinges on pictures

I'm not sure kernel you're running but you can definitely unvervolt by at least -100 to -150 (careful past -100). To me those voltages settings seem kinda high. What governor and scheduler are you running? If you're looking for battery life go with on demand and noop / deadline. If you're looking for smoothness go with interactive and row / fiops combo. Don't overclock. You should get better batt life.
Edit: Just reread original post. Updating the kernel to the latest Franco may help. I also hear 111 does good job on battery life. I use trinity though so I'm not sure.