Database Users

King's Kernel - Input Needed

So I basically have Stock 2.2 with a lot of the unnecessary apps removed. The other day I installed King's 4th Kernel hoping for better battery performance but in the end it's a little worse. I'm not blaming the kernel for my performance issues. But I'm looking for feedback to get better battery life.
Right now I am not using Set CPU. I just flashed the ROM, wiped the dalvik cache, and decided not to wipe the battery stats. I've been using the #4 kernel for two days now.
I work my phone pretty hard every day and have a good idea of when it's gonna die. I don't bother bump charging but rather replace the battery with a spare I have on hand.
Any recommendations to fix my problem?
Try a different kernel?
Get Set CPU? I'm not interested in overclocking but I realize other features are available.
Wipe the battery stats?
One thing I can say for certain is that I've been using this kernel with my current setup for 2 days now and battery performance is worse. Something definitely needs to be tweaked in my engine because I shouldn't have to use 3 batteries in one day.
Again, I want to reiterate that I know there are a lot of factors that affect battery life. I'm basing my opinion off of my past battery life throughout the day. It's probably not the kernel but how I have things setup. I'm just looking for some direction to extend the life a bit.

The biggest thing to do will be setcpu. Underclocking during screen off and using conservative governor will drastically improve battery life.

I haven't ever had good luck with the King kernels on my phone. Adrynaline's Custom kernel has worked awesome for me though. Took it off the charger at 11am yesterday, used it regularily and didn't charge until today at 3pm and still had 32% battery left. I use SetCPU for underclocking the phone when the screen is off and that seems to be the best way to save battery. I also don't have anything syncing throughout the day besides gmail accounts.

Ok, well I guess I will start with Set CPU. Sounds like it's worth the cash. Maybe I'll try a different kernel at the same time.
Thanks.

Setcpu is available for free to xda forum members. Do a bit of searching around and you'll find the link to the .apk

Grikshanks said:
The biggest thing to do will be setcpu. Underclocking during screen off and using conservative governor will drastically improve battery life.
Click to expand...
Click to collapse
Setting CPU Max at 555 when screen is off took me from 9-14hours to 25-30hours.
Clearing battle stat seems important
I like interactive mode when it seems to be working right. I don't really know what Interactive mode is except that setcpu will show the CPU jumping to differant frequency instead of ramping up like with conservative.
Sent from my ADR6300 using Tapatalk

Jaguox said:
Setcpu is available for free to xda forum members. Do a bit of searching around and you'll find the link to the .apk
Click to expand...
Click to collapse
I knew this and had forgotten. Fortunately, right before I dropped the cash the light bulb came on. I appreciate the heads up anyway.
Has anyone had luck with King's Kernels?
srt4mn, do you have a link to the kernel you are using?

The kernel comes with the Virtuous ROM and can be downloaded as a separate entity from ROM Manager in his area.

FlairDevil said:
The kernel comes with the Virtuous ROM and can be downloaded as a separate entity from ROM Manager in his area.
Click to expand...
Click to collapse
Ok, cool. I'll give it a shot. Is it tweaked to work just with the ROM or is it safe to install in Stock 2.2 as well?

Clambert11- Sounds as if you wrote your post for me. I haven't tried a custom rom or kernel yet but KK was the what I was considering. I do have setcpu running for a couple weeks now with underclocking for screen off, battery under 50%, and battery under 30%. Have noticed a modest improvement, mostly while phone is asleep at night. Not really much difference with day use. I carry a spare battery and charge at every opportunity.
I'll be watching this thread to see how the new kernel works for you. Sounds like it can be installed over the stock 2.2, yes? Does it require a full wipe?

marcmarshall said:
I'll be watching this thread to see how the new kernel works for you. Sounds like it can be installed over the stock 2.2, yes? Does it require a full wipe?
Click to expand...
Click to collapse
I just installed Virtuous Custom Kernel - Version 2 without any issues. All I did was wipe the dalvik cache. I'm still not a firm believer that wiping the battery stats does anything. Now to setup SetCPU... I will report back in a couple days.

I tried bump charging with wiping battery stats a couple days ago. Didn't see any difference.
I be watching for your post. I'm happy with my rooted stock. This phone has more tricks than a $2000 hooker. The battery life is the big problem for me.

In regards to wiping battery stats, here's what I do and what seems to work good for me.
This is best to do when you have times when you wont need your phone to much.
1. Full charge phone while phone is on
2. Leave USB/power cord plugged in and turn power on phone off
3. Wait for the LED to change from orange to green while phone is off, this means you have a full charge.
4. Power on phone to get to recovery
5. Go to advanced > clear battery stats
6. Reboot phone
7. Pull out charge cable once your phone fully boots
8. Fully kill phone battery without plugging it in to USB or power the phone until it dies completely
9. Turn phone back on with charge plugged in after battery fully dies and phone shuts itself off, charge till 100%
I also keep my screen brightness down really low, this seems to help maintain good battery life too.

Those are good detailed directions. I had been wondering about when to plug and unplug. I also never fully discharged the battery. Li bats don't have memory issues so why fully discharge? Is the claim that this effects or resets something in the OS? If so where does this info come from? I wonder if someone pulled it out of his butt and it has become doctrine. Did you really see a difference? Did you try something else like lower screen brightness or setcpu at the same time?

i've been running bfs #4 on stock rooted 2.2 for about a week now. loaded the kernel through clockwork. it's working good for the most part and i've been keeping it mostly at stock speeds. however, i have noticed an occasional lag here and there (that i didn't noticed with the stock kernel) but no reboots or lock ups. i'm going to disable setcpu to see if that has any impact.

marcmarshall said:
Those are good detailed directions. I had been wondering about when to plug and unplug. I also never fully discharged the battery. Li bats don't have memory issues so why fully discharge? Is the claim that this effects or resets something in the OS? If so where does this info come from? I wonder if someone pulled it out of his butt and it has become doctrine. Did you really see a difference? Did you try something else like lower screen brightness or setcpu at the same time?
Click to expand...
Click to collapse
You pose a good question. I myself dont know the source of the battery stat information, and coming from apple products I've been conditioned to not asking questions, but I can claim from experience that wiping the battery stats help the OS more accurately report the battery percentage.
Since I recently reflashed a new rom and kernal, my discharge rates were rather wonky. The first 15% went pretty fast (as they usually do) since I didn't bump charge. Then it remained normal till 50% when it spiked till 20%, then remained normal till 15% where it took forever to diminish.
Wiping the battery stats will help this number be more consistent since (to me) it helps the OS learn about the battery in conjunction to the kernal being used. I'm assuming that this feature exists because we can swap batteries. Ever curious why apple locks their batteries in their devices? If I had to guess it would be to avoid this whole debacle. They only use one type of battery for each device and as such can report battery percentage more accurately. Plus its easier for them to design.
I've gotten sick of bump charging, so I reset my battery stats after charging to full and not bump charging. This should give me a more accurate drop in battery for the first 15%.
This is all information I've gathered through experience. I do not program these devices, so take it for what its worth. If any Li-ion engineers are around here, help!
Sent from my ADR6300 using XDA App

Just an update. I've been running Virtuous for a few days now. I thought I installed Custom Kernel v2 but the System Settings say v1. I'll have to look into that. Kinda odd.
Anyway, I also am using SetCPU, which I think is responsible for most of the savings I have received. I've got the default scaling set to Conservative. Additionally, I have a Screen Off profile of 245 max / 245 min in Powersave and a Battery < 10% profile of 806 max / 245 min in Conservative.
I'm still playing the kernel / SetCPU game for the optimum settings but I've bought another 1.5 to 2 hours of life without feeling any real performance woes. I'm hard on the phone and use it a lot. That's what we have them for, right?
I had issues with King's Kernel #4. My phone, at times, would get real sluggish without even using SetCPU. I may try some of his older kernels or his next kernel (when it's released) to see how it behaves.
Just wanted to touch base. Thanks for the previous input and guidance.

Thanks for the update! I think my greatest savings so far has been from a screen off profile at about 460 max. I also have a 50% and a 30% profile.

Phone over-heat!! Help please!

I was charging my phone last night, and in the morning my phone was extremely hot. I've never felt anything as hot before with my phone. I had to shutdown the phone and pull out the battery fast. Seriously, I thought my phone would explode. Did anyone else experience the same problem??
Sent from my HTC bravo using XDA App

it happens, are you using the OEM battery and charger?

mofoahh said:
it happens, are you using the OEM battery and charger?
Click to expand...
Click to collapse
yes I am. I've also noticed that my phone charges really fast too, maybe 2 or 3 times faster than its normal rate?
Any ideas to prevent it from overheating while charging??

wrong place to post, u should have posted it here or here

Do you have an app called "SETCPU"? if not some android builds or older builds don't have control over the CPU and leaves it running at 998MHz even in sleep mode when it should be 245MHz in sleep mode. Get the app in this fourms. It will even allow you to overclock up to 1190MHz for extra proformance but may kill your battery faster. I once had this problem and sloved it with SETCPU. Good Luck.

you can also set a profile for your CPU to max out at say 600mhz if it goes above 40 degrees c or what have you.

Or maybe his charger is faulty...

[SCARY] Battery Heating Like A Mother******

Ok so i woke up this morning to find that my vibrant was heating up to 84 degree celcius which is like 183 degree farhwenheit. I burnt my fingers while touching the phone this morning (not literally). And here is what happened:
I usually sleep by charging my phone and putting it under my pillow before sleeping. I plug in my headphones, use miui music player's sleep timer and sleep. I didnt have this problem before. Here is my config:
Project - V Latest
Rooted
No Battery Hog Apps (Normal Drain = 2MA)
Bali - Capped
Running at stock frequency (No overclocking)
The only change I have made before this started happening is changed to bali kernel. Could that be the problem. Is it normal?

have you oc'd at all, how long has this issue been going on?
generally speaking i have noticed that when i had my vibrant oc'd it would heat up alot when charging, my reccomendation is to set a setcpu profile to throttle your cpu speed when charging. I had mine throttle back to 800MHz while charging and the heating issue was severely diminished. Never let your phone charge while the cpu is oc'd beynd 1ghz that has always given me heating issues.
Hope this helps
-Cheers

shreddintyres said:
have you oc'd at all, how long has this issue been going on?
generally speaking i have noticed that when i had my vibrant oc'd it would heat up alot when charging, my reccomendation is to set a setcpu profile to throttle your cpu speed when charging. I had mine throttle back to 800MHz while charging and the heating issue was severely diminished. Never let your phone charge while the cpu is oc'd beynd 1ghz that has always given me heating issues.
Hope this helps
-Cheers
Click to expand...
Click to collapse
Thx for the reply. I forgot to post that i wasntr overclocking at all. And its not undervolted as well. Thanks for the reply anyways

Any bali kernel gives my phone a perpetual fever. I've taken all bali downloads off my sd and will not use one anymore I don't care about what minimal if any battery life it's supposed to give you(although I never noticed any battery life increase) if it fries my phone.
Sent from my SGH-T959 using XDA Premium App

Overstock, bullet, and now maybe dragonmodz w/smartass are the only ones I trust for reliability now.
Sent from my SGH-T959 using XDA Premium App

Wait, where do you find MIUI sleep timer?
Sent from my SGH-T959 using XDA App

same exact thing happened to me, ran project-v and on overstock at the time, i honestly thought the internal components would have melted from that heat. Only thing that happened was the battery was completely drained

The first time I had used Bali on a ROM, I thought I made a bad flash and my phone was throwing a feverish fit.
bali is good and all, but all that overheating scares me.

Typically that happens to me except I don't run any apps while asleep. I've taken it to tmo and they said it's fine. If anything my batt smells like what the batt itself is made off. More along the lines of something from the batt has leaked. However the phone ends up overheating on a simple wordfued or words with friends play action. At times the phone ends up turning itself off.

It may be because you have the pillow over the phone. I left mine charging once with a pillow over it by accident and it got real hot.

jordanjf86 said:
It may be because you have the pillow over the phone. I left mine charging once with a pillow over it by accident and it got real hot.
Click to expand...
Click to collapse
Did same thing i burnt my finger on screen lmao i jus pulled out battery an put fan on it
Sent from my SGH-T959 using XDA Premium App

i forgot to mention that when i found my phone is was under my pillow so im positive that its the pillow that's causing the overheating

darksandz93 said:
i forgot to mention that when i found my phone is was under my pillow so im positive that its the pillow that's causing the overheating
Click to expand...
Click to collapse
That's most probably the case. Its happened to me multiple times were ill fall asleep while using my phone and I end up waking up to it burning my skin (not literally) after getting really hot somewhere under me and my covers. Lolol
Sent from my T959 using XDA Premium App

Wifi overheating
Hi people.
I flashed Bali 1.8.8 UV and noticed my Vibrant had severe overheating problems when wifi is turned on. Not working as you may know, but with a minimal network traffic. I have switched to Bali X, but I have heard that all the Bali kernels suffer from overheating.
Please, tell me a kernel that has great battery life and doesn't have this inconvenience. My battery drops badly with this one!
Thanks a lot.

Ecotox's kernel is save way more battery IMO!
Sent from my SGH-T959 using XDA App

What thread? Can you provide me a link? Thanks!!

I apologize I haven't replied its been a while since I've been on here, but here's the link for ECOTOX's kernel
http://forum.xda-developers.com/showthread.php?t=1049894

Deadly Issue ;( !! (UPDATE: occurs with the stock kernel)

Hello everyone...
I have 2 issues with my Transformer
the first one is that whenever i leave my Transformer for couple hours it shuts down !! doesn't occur when charging but it does when it's not.. even when the battery is around 80% !! i had this problem with ALL kernels except the stock kernel which i don't wanna use !! also had this problem for around 2 months...
the second one happened today when i left my Transformer "Charged" at 100%.. and after couple of hours i found it shut down but when i powered it on again i found the battery 27% !!
i went to the battery stats and found that battery was decreasing slowly and there was a gap (which means that it turned off) and after the gap it shows the battery low !! it happened within 6 hours !!
Please help me if you can... !! I'm using Revolver ROM 3.9.5 and "Blades Kernel 3" that comes in the Revolver Parts...
UPDATE : The problem occurs with the stock kernel !!

This sounds very familiar to the problem I had with my Galaxy S2 a month ago.
It kept shutting down every few hours, and it was driving me mad. Then one day I uninstalled the app greenpower, and it was fine afterwards. You don't have the greenpower app by any chance? If not, maybe it can be caused by some other app you normally use?

The battery might be hosed. Have you ever let it hit 0 before? A lot of batteries never fully recover after being fully depleted once or twice.

Cernunnoz said:
This sounds very familiar to the problem I had with my Galaxy S2 a month ago.
It kept shutting down every few hours, and it was driving me mad. Then one day I uninstalled the app greenpower, and it was fine afterwards. You don't have the greenpower app by any chance? If not, maybe it can be caused by some other app you normally use?
Click to expand...
Click to collapse
I never heard of this app... Just like i said it doesn't happen with the stock kernel !!
But the reason I'm using other kernels is because i wanna Overclock !!

a.mcdear said:
The battery might be hosed. Have you ever let it hit 0 before? A lot of batteries never fully recover after being fully depleted once or twice.
Click to expand...
Click to collapse
No i never let it hit 0%... but i don't think that the problem is in the battery
However I'll try it and see what happens !

sounds like a silly question but i have seen it alot. Are you charging through a computer(USB) or wall?

It could be related to setCPU and the according profiles. Just recently I saw that my profiles were messed up after updating ROM and kernel. Might be worth a shot.

Reinstall stock kernel Issue #1 fixed.
Issue 2 sounds like charger shut off and left TF on not charging.

You've pretty much explained to yourself why the thing is shutting down.. It works fine on the stock kernel but not one that is letting you overclock.. Sounds to me like you are either overclocking more than it can handle or undervolting to much or both.
I can almost bet that its not shutting down completely and its just going into a state that the screen is off but the OS is hung up, so its not responding to you turning the screen on.. This would explain why the battery seems to be dieing when its sitting idle.
Not sure about it dieing while its plugged in other than maybe a fluke.

I don't wanna use the stock kernel.. it's really slow !!
and i over clock to 1.4 ghz only since i can't overclock more than that because it restarts itself endlessly if i overclocked more than 1.4 ghz !! i undervolted about -25 or -50.. not much !!
Yes i charge it on a wall or anything but NOT on my computer...
How can i change profiles in setcpu ??

xMini said:
No i never let it hit 0%... but i don't think that the problem is in the battery
However I'll try it and see what happens !
Click to expand...
Click to collapse
No no you misunderstood! DONT let the battery hit 0.

First, you need to use more exclamation points !!!!
sounds like you are suffering from deep sleep issues. What rom are you running? also, have you tried running a custom kernel and not overclock it? You have several variables that can be influencing your issues, start isolating what may be causing your problems. the kernel seems the must likely of culprits, I would clear the overclock and install setcpu and run it for a but and see if you can replicate your issue.
Sent from my GT-I9000 using XDA App

Just try the non stock kernel, oc it but dont uv it, not all devices can handle uv, even if it is only a little bit. Even take it back too 1000mhz and try to increase the uv and oc by little bits at a time to see exactly what your transformer can handle. I think its the uv thats causing the problems. Experiment a bit and youll find the sweet spot.

I'm using Revolver ROM and i mentioned that...
I've never undervolted till yestersay.. maybe it caused the second problem
I set the clock speed at 1ghz and i'm waiting to see if anything changes..

Yeah... the problem still occurs even after setting the clock speed at 1ghz and default voltage !! using clemsyn kernel ver 22...

Every device is different. Differences in manufacturing etc. You might have a picky device. Plus these are mobile platforms. No fans, just convection cooling. They are not meant to be tweaked and oc'ed they way we do. The stock kernel is very fast. What is it that you cannot do on the stock kernel that the extreme oc let's you do?
Sent from my DROID X2 using Tapatalk

colonel187 said:
Every device is different. Differences in manufacturing etc. You might have a picky device. Plus these are mobile platforms. No fans, just convection cooling. They are not meant to be tweaked and oc'ed they way we do. The stock kernel is very fast. What is it that you cannot do on the stock kernel that the extreme oc let's you do?
Sent from my DROID X2 using Tapatalk
Click to expand...
Click to collapse
I'm guessing my device is bad and it's Asus' problem ! i tried setting the clock speed at normal 1Ghz but the problem still occurs !! the reason i overclock is that because with the stock kernel i get slower web browsing and slower flash playback and slower overall performance!! however I'm back on the stock kernel to check out if the problem is gone or not...
I doubted my device couple months ago... because I've seen everyone overclock their devices at 1.6 GHz Without any issues !! but when i try to overclock a little bit more than 1.4 GHz it restarts itself endlessly !!

Had the same issue a few months ago. Be prepared to wake up to a dead TF.
I sent it back to ASUS and they replaced main board and battery. Under warranty of course. I suggest you unroot and use a stock rom for now.
Sent from my GT-I9100 using XDA App

ropaisoft said:
Had the same issue a few months ago. Be prepared to wake up to a dead TF.
I sent it back to ASUS and they replaced main board and battery. Under warranty of course. I suggest you unroot and use a stock rom for now.
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
What do you exactly mean by "for now" ??
and how can i even send it to ASUS ??! i don't live in the USA

xMini said:
I'm guessing my device is bad and it's Asus' problem !!!
Click to expand...
Click to collapse
You stated in an earlier post that the problem does not show up in the stock ASUS setup, but only with a custom ROM and Kernel. How does that make it ASUS' problem. If you buy a car that says it runs on 87 octane fuel and you put 100% nitro methane in the tank and it blows up it is not the manufacturers fault.

note on steriods???

i just noticed this morning after unplugging my note that even though my note is going into deep sleep the battery drain is still way too much as compared to the previous day...
i checked cpuspy and at first didn't register anything odd except that it goes into deep sleep.. after a second glance only then i realized that instead of running at 200mhz my note was running at 1000mhz during charge..
has anyone here experienced this before?? although i noticed that it seems to be a lot snappier now
i just can't help but worry what lasting damage it may be doing to the processor... and the fact that even though it goes into deep sleep i'm losing about 5% of juice for every 15-20 mins.
see screenshots below. the first was when i unplugged it from the charger and the second... after going to deep sleep

see screenshots
sorry forgot to attach screenshots

scarlet_sg said:
i just noticed this morning after unplugging my note that even though my note is going into deep sleep the battery drain is still way too much as compared to the previous day...
i checked cpuspy and at first didn't register anything odd except that it goes into deep sleep.. after a second glance only then i realized that instead of running at 200mhz my note was running at 1000mhz during charge..
has anyone here experienced this before?? although i noticed that it seems to be a lot snappier now
i just can't help but worry what lasting damage it may be doing to the processor... and the fact that even though it goes into deep sleep i'm losing about 5% of juice for every 15-20 mins.
see screenshots below. the first was when i unplugged it from the charger and the second... after going to deep sleep
Click to expand...
Click to collapse
Try restarting and see it is softens up
Sent from my GT-N7000 using xda premium

tried it... even did a hard reset by pulling battery out... still the same...
now clueless on what next...

See what processes are running. And kill some unneccessary ones?
Sent from my GT-N7000 using XDA

scarlet_sg said:
tried it... even did a hard reset by pulling battery out... still the same...
now clueless on what next...
Click to expand...
Click to collapse
ANy new apps that u installed recently ?
Normally , rogue process is going to call an abnormal battery drain ,,,download some sort of process,app moniter and see which process is running and taking most of the CPU time......My guess is that it has to be one of the apps that you have installed or started which is causing this

That was what I thought initially but I don't remember installing anything these past few days as I just froze a few bloatware and was monitoring the device for any issues.
The last thing I remember changing was some setting under the development concerning background process.
Hmmmn. Maybe I'll put it back and see.
Really appreciate the help guys. I'll keep you updated.
Sent from my GT-N7000 using XDA

Kernel and rom version pleeez
Sent from my GT-N7000 using Tapatalk 2

scarlet_sg said:
The last thing I remember changing was some setting under the development concerning background process.
Hmmmn. Maybe I'll put it back and see.
Click to expand...
Click to collapse
this may be the reason - afair this setting kills each process after you leave it, so in readily you might have ended with a constant loop of processes being closed and then restarted by system
Sent from my GT-N7000 using xda premium

i unchecked the limiting of background process but still the same... cpu is still running at 1000mhz most of the time
i did a hard reset by turning off and pulling the battery for a few minutes... still the same although the note still goes into deep sleep but hardly uses other cpu speeds except for 1000mhz...
i tried freezing some of my apps and games, those which i suspect might have required 1000mhz to run but still the same...
i guess i'll just have to wait and see for a little while if this changes...
i'm now thinking of reverting back to GB... since the battery drain for ICS is such a let down and with this problem... i'll give it a couple more days

what ROM are you running?
anyway something in the governor seems to have changed ,your case seems to be a performance governor.
try installing set cpu and set minimum to 200 ,max to 1400 ,and the governor to "on demand"
should fix things for you

IM on stock Ics lp9. I haven't root yet after I upgraded ota.
Set CPU requires root ain't it?
Sent from my GT-N7000 using XDA

scarlet_sg said:
IM on stock Ics lp9. I haven't root yet after I upgraded ota.
Set CPU requires root ain't it?
Sent from my GT-N7000 using XDA
Click to expand...
Click to collapse
yes it does ,but if you're not rooted then the governor couldn't possibly have changed by you !!
could it be a bug in lp9? I heard that ICS have some battery issues
how long were you running LP9 before noticing this issue?

Well, havent heard it from that rom. Bring it back
Sent from my GT-N7000 using Tapatalk 2

it might be the fault of some rogue app running in background, did you check with betterbatterystats?
Sent from my GT-N7000 using xda premium

I was using lp9 for about 2 Weeks after I started noticing the CPU usage
Couldn't find a fix so I reverted back to rooted lc2 GB
With all the issues with Ics - battery drain, fc's and mmc bug and now this CPU overclocking felt it wasn't worth it.
Now the note is sleeping like a baby. Battery is back to its efficient self. I'm getting 3 days on one full charge.
Will just wait for an update on official Ics.
Appreciate all the help guys.
Sent from my GT-N7000 using XDA