[Q] Does it really save power to reduce cpu frequency - Verizon Samsung Galaxy S III

We use kinds of kernel and cpu tools ,does it really save power ?if so,which kernel do you think is the best..Thanks so much

I like PA rom and i just want to know which kernel would be better......

Cant say whats best kernel. Kernel is fone depended. Some kernel work well for some ppl but wont work with others. The most popular is BMS and KT747 kernels. Give them a try. Im on bms stock battery get about 13-15hrs with 7hrs sleep mode and 3-4hrs of screen time
---------- Post added at 11:46 AM ---------- Previous post was at 11:40 AM ----------
Cant say whats best kernel. Kernel is fone depended. Some kernel work well for some ppl but wont work with others. The most popular is BMS and KT747 kernels. Give them a try. Im on bms stock battery get about 13-15hrs with 7hrs sleep mode and 3-4hrs of screen time

hunforfee1 said:
We use kinds of kernel and cpu tools ,does it really save power ?if so,which kernel do you think is the best..Thanks so much
Click to expand...
Click to collapse
Undervolting is over rated. If lucky may gain 30 minutes on a complete charge/discharge cycle. Too much can cause reboots and/or increase battery drain.

prdog1 said:
is over rated. If lucky may gain 30 minutes on a complete charge/discharge cycle. Too much can cause reboots and/or increase battery drain.
Click to expand...
Click to collapse
i see,thanks very much:sly:
Sent from my Nexus 10 using XDA Premium 4 mobile app

IMO its pointless to mess with the CPU settings in order to save battery. Seems like the major cause of battery drain is always going to be screen on time.

Related

I`m new with HTC Sensation and please some help

Hi.I`m new with htc sensation and i need some help please.I installed a custom rom,ViperS 1.6.3 with bricked kernel,badass governor and noop IO and my battery drain is huge (especially in games) 15-20% in 5 minutes of subway surfers.What kernel is best for this rom for balance bettwen battery-performance,especially for saving my baterry?And what settings?Please suggests or tell me from own experience.Regars
buju001 said:
Hi.I`m new with htc sensation and i need some help please.I installed a custom rom,ViperS 1.6.3 with bricked kernel,badass governor and noop IO and my battery drain is huge (especially in games) 15-20% in 5 minutes of subway surfers.What kernel is best for this rom for balance bettwen battery-performance,especially for saving my baterry?And what settings?Please suggests or tell me from own experience.Regars
Click to expand...
Click to collapse
Hi,
Play games =more cpu=more battery usage.
You cannot get away from that.
How long have you had this ROM and kernel.
You need to give them time to settle.
Battery works best after several cycles(charge/discharge)
Give it a chance...
malybru said:
Hi,
Play games =more cpu=more battery usage.
You cannot get away from that.
How long have you had this ROM and kernel.
You need to give them time to settle.
Battery works best after several cycles(charge/discharge)
Give it a chance...
Click to expand...
Click to collapse
Yes,but so huge battery drain?I never see this on other phone
My phone isn`t new,so battery have severl cycles.I have this rom and kernel from yesterday.What kernel and settings i must to try?
buju001 said:
Yes,but so huge battery drain?I never see this on other phone
My phone isn`t new,so battery have severl cycles.I have this rom and kernel from yesterday.What kernel and settings i must to try?
Click to expand...
Click to collapse
Hi,
You cannot compare the Sensation battery with other phones.
The Sensation battery is really [email protected]
Please understand what I am saying.
EACH new ROM and kernel needs to have several cycles before it will work optimally.
So,if you just installed this ROM yesterday,you need to give it more time...
buju001 said:
Yes,but so huge battery drain?I never see this on other phone
My phone isn`t new,so battery have severl cycles.I have this rom and kernel from yesterday.What kernel and settings i must to try?
Click to expand...
Click to collapse
lower ur cpu clocks to 1ghz or 800mhz..subway surf works fine on that speeds..
malybru said:
Hi,
You cannot compare the Sensation battery with other phones.
The Sensation battery is really [email protected]
Please understand what I am saying.
EACH new ROM and kernel needs to have several cycles before it will work optimally.
So,if you just installed this ROM yesterday,you need to give it more time...
Click to expand...
Click to collapse
I see few minutes later.After restart the phone my battery have + 2-3%.And,after wipe chache and restart, from 20% became 40%)
Sometimes i`m very impatient and i have installed faux kernel 010b10 few minutes ago.Now let this kernel few days and test it?Or install back bricked and test?
Thanks a lot for your halping and for your speed to reply.You've been very helpful and yesterday.Respect!
buju001 said:
I see few minutes later.After restart the phone my battery have + 2-3%.And,after wipe chache and restart, from 20% became 40%)
Sometimes i`m very impatient and i have installed faux kernel 010b10 few minutes ago.Now let this kernel few days and test it?Or install back bricked and test?
Thanks a lot for your halping and for your speed to reply.You've been very helpful and yesterday.Respect!
Click to expand...
Click to collapse
Hi,
Faux is the kernel I use when I am on a Sense ROM.
I always get good battery life from it.
Give it a few days to settle before judging it.
malybru said:
Hi,
Faux is the kernel I use when I am on a Sense ROM.
I always get good battery life from it.
Give it a few days to settle before judging it.
Click to expand...
Click to collapse
Ok.I will let this kernel andd see how is battery life for few days.And what governor,io,and cpu freq suggest to use?
buju001 said:
Ok.I will let this kernel andd see how is battery life for few days.And what governor,io,and cpu freq suggest to use?
Click to expand...
Click to collapse
Hi,
My personal choice is intellidemand.(Min 384,Max 1118)
But this is only because my phone runs coolest on it.
It still gets warm if I play games ,though.
malybru said:
Hi,
My personal choice is intellidemand.(Min 384,Max 1118)
But this is only because my phone runs coolest on it.
It still gets warm if I play games ,though.
Click to expand...
Click to collapse
I will set intellidemand with sio,min 192 or 384 and max 1118 for begin and see how it`s runs.It`s ok?And why gets warm?
It tends to get warm because CPU need to run quicker instructions.
If its sensation then bear with the slightly bad battery.
Because its a 1500mAh battery but needs to hold up a 4.3 screen.
Lower clock speed clean background apps before playing. It helps at least a little.
KiD3991 said:
It tends to get warm because CPU need to run quicker instructions.
If its sensation then bear with the slightly bad battery.
Because its a 1500mAh battery but needs to hold up a 4.3 screen.
Lower clock speed clean background apps before playing. It helps at least a little.
Click to expand...
Click to collapse
Ok.I understanding now.And what about this cpu settings?Thanks a lot guys.
I find one bug on the system language.On romania language i don`t have character "Ț" and i can`t understand some words:| I read somewhere cause the fonts aren`t update.Where i can find a patch with updated font for my sensation for flash in recovery?Somebody know?
If you're not crazy with games you can downclock it to below 1000ghz. Its more than enough for most apps.
As for your system language, post another thread would be good.
KiD3991 said:
If you're not crazy with games you can downclock it to below 1000ghz. Its more than enough for most apps.
As for your system language, post another thread would be good.
Click to expand...
Click to collapse
No,i`m not crazy with games.I will try and 1000ghz.Thanks So,i will post another thead for system language.
Guys,i have one more question.When i turn on wifi,it should show me available networks,like on every smartphone,wright?Cause isn`t show. i must go everytime to settings for see them.
I`m back with results
Can someone suggest better kernel and configuration for better battery life please?
I have tested a few kernel and with each have same results:max 12-13 hours battery,with only 1-1,5 hours of screen on and normal usage(just 10 minutes of gaming,~40 min. voice calls,~10 min of facebook and few sms).At all kernel max cpu was 1188 and min cpu 192, no GPU overclocked.I tried this:bricked v1.36,sultan v19.5 with badass governor , faux with intellidemand and sebastian with ondeman (with this i have just 11 hours of battery).I am on darksense v1.2.1 rom.What seems to be suspect is cause when i use phone,battery drain so much and when is locked battery remains intact.Thanks and sorry for long post.
Up!
buju001 said:
Can someone suggest better kernel and configuration for better battery life please?
I have tested a few kernel and with each have same results:max 12-13 hours battery,with only 1-1,5 hours of screen on and normal usage(just 10 minutes of gaming,~40 min. voice calls,~10 min of facebook and few sms).At all kernel max cpu was 1188 and min cpu 192, no GPU overclocked.I tried this:bricked v1.36,sultan v19.5 with badass governor , faux with intellidemand and sebastian with ondeman (with this i have just 11 hours of battery).I am on darksense v1.2.1 rom.What seems to be suspect is cause when i use phone,battery drain so much and when is locked battery remains intact.Thanks and sorry for long post.
Click to expand...
Click to collapse
Hi,
It seems you are going the right way about it.
No 2 people use their phones in the same way,so battery life will vary,and there is no single setup that will work for everybody.
Keep trying different combination of ROM and kernel.
But give them a couple of cycles each,otherwise you will not see how they work properly.
malybru said:
Hi,
It seems you are going the right way about it.
No 2 people use their phones in the same way,so battery life will vary,and there is no single setup that will work for everybody.
Keep trying different combination of ROM and kernel.
But give them a couple of cycles each,otherwise you will not see how they work properly.
Click to expand...
Click to collapse
Thank you so much for reply.I understand this and i will keep trying to find best choice for my sensation.Now i`m on bruce cm10 and for now is awsome and battery life is great.

[Q] How to set the frequency for battery,with stock kernel?

I have only flashed the rom not kernel in LG P500.But want to see if the frequency of the processor can help me.My battery drains very fast and i don't play any games etc also.
My minimum is 320 Mhz & maximum is 600 Mhz.I want to do mainly coz battery is draining too fast & not once i am able to charge full.Thanks
kitu34 said:
I have only flashed the rom not kernel in LG P500.But want to see if the frequency of the processor can help me.My battery drains very fast and i don't play any games etc also.
My minimum is 320 Mhz & maximum is 600 Mhz.I want to do mainly coz battery is draining too fast & not once i am able to charge full.Thanks
Click to expand...
Click to collapse
Hmmm you may have to calibrate your battery
Use this app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
BTW which ROM are you using ?
Sent from my GT-I9082 using xda premium
akiratoriyama said:
Hmmm you may have to calibrate your battery
Use this app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
BTW which ROM are you using ?
I am using pac-rom 4.2.2.
Click to expand...
Click to collapse
all CM based roms shoud have in settings development a thing to activate to show you CPU usage, if you tick that option, CPU usage(frequency) it will be shown on home screen in a little widget
or use CPUSpy
if battery drains fast it is because of various problems, wifi, apps that runs in background and prevent deepsleep and causes wakelocks, but CPUSpy it will list all hungry apps and all CPU usage
cpu frequency cannot be set over 600 with stock kernel, but it can be changed with some apps like SetCPU or CPUMaster (root required), this apps have profiles for different situations (screen off, charging, gaming, music, talking, net surfing etc), if I remember SetCPU can be found here on XDA free, search it
grigtm said:
all CM based roms shoud have in settings development a thing to activate to show you CPU usage, if you tick that option, CPU usage(frequency) it will be shown on home screen in a little widget
or use CPUSpy
if battery drains fast it is because of various problems, wifi, apps that runs in background and prevent deepsleep and causes wakelocks, but CPUSpy it will list all hungry apps and all CPU usage
cpu frequency cannot be set over 600 with stock kernel, but it can be changed with some apps like SetCPU or CPUMaster (root required), this apps have profiles for different situations (screen off, charging, gaming, music, talking, net surfing etc), if I remember SetCPU can be found here on XDA free, search it
Click to expand...
Click to collapse
Thanks, but in this rom there is one feature called 'performance control' and it shows exactly what cpu spy shows.I have used cpu spy and it does not show hungry apps,maybe it is cpu spy plus.
I AM CHECKING REGULARLY AND MY PHONE IS NOT GOING INTO DEEP SLEEP AT ALL EVEN WHEN SCREEN OFF.
And i have installed only whatsapp and titanium.My battery was at 80% when it freezed and when i took the battery out and restarted it battery was at 40%.
And i am concerned about the minimum frequency which is 320 in this,it can be changed to 122 which is not being used coz of the default settings.I s it safe to do?
with stock kernel any freqv is stable, but it will not help, something is preventing deepsleep, uninstall some apps that you suspect that can do this problem, search web abouth apps that you have installed on your phone, or read pacman thread or change kernel, I do not think a custom rom runs well with LG stock kernel, and when you flash a custom rom that rom comes with a custom kernel, try DJNOxD or sweetnsour 2.6 kernels
change governor and test it, maybe it will help, I allways use smartass governor but search forum for governors preventing deepsleep
get Better Battery Stats, this gives more detailed battery usage
akiratoriyama said:
Hmmm you may have to calibrate your battery
Use this app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
BTW which ROM are you using ?
Sent from my GT-I9082 using xda premium
Click to expand...
Click to collapse
I think my phone is not going into deep sleep and it is coz of the minimum frequency which is 320.
But still i will try battery calibration but i can't install from google store.Is there anyother place or can you attach here the apk?
read here http://forum.xda-developers.com/showthread.php?t=2358278 , some of us are writing some personal thoughts abouth battery drain
---------- Post added at 07:21 PM ---------- Previous post was at 07:20 PM ----------
kitu34 said:
I think my phone is not going into deep sleep and it is coz of the minimum frequency which is 320.
But still i will try battery calibration but i can't install from google store.Is there anyother place or can you attach here the apk?
Click to expand...
Click to collapse
I use min 480 and my phone goes into deepsleep
grigtm said:
with stock kernel any freqv is stable, but it will not help, something is preventing deepsleep, uninstall some apps that you suspect that can do this problem, search web abouth apps that you have installed on your phone, or read pacman thread or change kernel, I do not think a custom rom runs well with LG stock kernel, and when you flash a custom rom that rom comes with a custom kernel, try DJNOxD or sweetnsour 2.6 kernels
change governor and test it, maybe it will help, I allways use smartass governor but search forum for governors preventing deepsleep
get Better Battery Stats, this gives more detailed battery usage
Click to expand...
Click to collapse
Yeah i have already installed betterbattery stats,lets see.Don't if i will be able to understand what it shows,set it to partial wakelock though.Pac Rom thread is not responding since three days,i mean no reply no help as yet.
Tomorrow i will do to things,one is remove this rom and have another & second is to remove the gapps as well and reflash.I do not know how to this.Then i will know if rom was responsible for this or not and decide for the kernel therafter.
Should i make new thread for that or you will tell here only?
or you can change rom if you do not solve the problem
grigtm said:
read here http://forum.xda-developers.com/showthread.php?t=2358278 , some of us are writing some personal thoughts abouth battery drain
---------- Post added at 07:21 PM ---------- Previous post was at 07:20 PM ----------
I use min 480 and my phone goes into deepsleep
Click to expand...
Click to collapse
480 minimum frequency? If yes then even 320 should not be a problem
kitu34 said:
Yeah i have already installed betterbattery stats,lets see.Don't if i will be able to understand what it shows,set it to partial wakelock though.Pac Rom thread is not responding since three days,i mean no reply no help as yet.
Tomorrow i will do to things,one is remove this rom and have another & second is to remove the gapps as well and reflash.I do not know how to this.Then i will know if rom was responsible for this or not and decide for the kernel therafter.
Should i make new thread for that or you will tell here only?
Click to expand...
Click to collapse
maybe changing kernel it will help, I use sweetnsour 2.6 version4e kernel http://forum.xda-developers.com/showthread.php?t=2140930
---------- Post added at 08:38 PM ---------- Previous post was at 08:31 PM ----------
oh, sry, I'am a big NOOB, all JB 4.2.2 are using 3.0.8 kernels that have big problems with wifi battery drain, it is a common problem with all JB roms, disable wifi And drain should be ok, but I recomand to use an ICS rom that uses 2.6 kernels
but this problem is known by everybody and discussed to all JB roms threads and in link that I provided you, so, it cannot be done by me or you, we have to wait for the people that can do real things in here, developers
this problem is because Qualcom and Google does not support old ARMv6 processors in JB, so with all the magic from XDA developers some problems cannot be solved
[/COLOR]oh, sry, I'am a big NOOB, all JB 4.2.2 are using 3.0.8 kernels that have big problems with wifi battery drain, it is a common problem with all JB roms, disable wifi And drain should be ok, but I recomand to use an ICS rom that uses 2.6 kernels
but this problem is known by everybody and discussed to all JB roms threads and in link that I provided you, so, it cannot be done by me or you, we have to wait for the people that can do real things in here, developers
this problem is because Qualcom and Google does not support old ARMv6 processors in JB, so with all the magic from XDA developers some problems cannot be solved[/QUOTE]
I do not use wi fi,i use only 3g.Mine kernel version it says is 2.6.35.10.
I used BB stats but did not understand much,only thing i could understand was gps location provider running all the time.
Phone did not sleep for one second neither this 'gps location provider'
By the way which cpu spy or cpu spy plus you were talking about which tells about the apps consuming battery,coz even in the cpu spy plus it is the same like cpu spy.
I was mistaken, it is better battery stats
grigtm said:
I was mistaken, it is better battery stats
Click to expand...
Click to collapse
Try DS Battery Saver...... it works with all versions and forces your phone to Deep Sleep.....
Hit Like if i helped you.....

Increasing battery life

Hi guys!
I was looking for ways to increase battery life.
As far as I know you can undervolt and decrese CPU speed
Undervolt does not affect performance but does increase temperature right?
Decrease CPU speed obviously decreases the speed of the phone.
Both these things can be achieved by using a custom kernel right? I heard of franco kernel as being the best for these things...
Any other ways of increasing battery life?
Cheers!
nad4321 said:
Hi guys!
I was looking for ways to increase battery life.
As far as I know you can undervolt and decrese CPU speed
Undervolt does not affect performance but does increase temperature right?
Decrease CPU speed obviously decreases the speed of the phone.
Both these things can be achieved by using a custom kernel right? I heard of franco kernel as being the best for these things...
Any other ways of increasing battery life?
Cheers!
Click to expand...
Click to collapse
Why not try Franco first before starting to tweak. The kernel's default settings are reputedly optimal for that elusive balance between performance and battery life.
Sent from my Nexus 5
PhilipTD said:
Why not try Franco first before starting to tweak. The kernel's default settings are reputedly optimal for that elusive balance between performance and battery life.
Sent from my Nexus 5
Click to expand...
Click to collapse
yeah well im using stock now so it was just a matter wether changing to franco would make a difference
nad4321 said:
yeah well im using stock now so it was just a matter wether changing to franco would make a difference
Click to expand...
Click to collapse
Yeah, give it a try. Since I installed it, the phone (and my N7, too) has become snappier, and battery life on standby is awesome (like 1-2%/hr). SOT, on the other hand, is still lamentable, even at dim levels. If you do go Franco, I recommend getting the FK updater app on the Play Store.
Sent from my Nexus 5
PhilipTD said:
Yeah, give it a try. Since I installed it, the phone (and my N7, too) has become snappier, and battery life on standby is awesome (like 1-2%/hr). SOT, on the other hand, is still lamentable, even at dim levels. If you do go Franco, I recommend getting the FK updater app on the Play Store.
Sent from my Nexus 5
Click to expand...
Click to collapse
Cheers! Do you know any good tutorial to unlock bootloader, root and instal custom recovery + kernel? Long process hahaha
nad4321 said:
Cheers! Do you know any good tutorial to unlock bootloader, root and instal custom recovery + kernel? Long process hahaha
Click to expand...
Click to collapse
There's a tutorial on this in the forum. I'd link it to you but I am on my tablet at the moment.
Sent from my Nexus 7 using Tapatalk 4
nad4321 said:
Cheers! Do you know any good tutorial to unlock bootloader, root and instal custom recovery + kernel? Long process hahaha
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2507905
http://forum.xda-developers.com/showthread.php?t=2508284
Sent from my Nexus 5
PhilipTD said:
http://forum.xda-developers.com/showthread.php?t=2507905
http://forum.xda-developers.com/showthread.php?t=2508284
Sent from my Nexus 5
Click to expand...
Click to collapse
Thanks again From your own experience what would you recommend TWRP or CWM
nad4321 said:
Thanks again From your own experience what would you recommend TWRP or CWM
Click to expand...
Click to collapse
TWRP, without a doubt. It's completely stable, and easy to use. CWM used to be really wonky; that's why I switched.
Sent from my Nexus 5
PhilipTD said:
TWRP, without a doubt. It's completely stable, and easy to use. CWM used to be really wonky; that's why I switched.
Sent from my Nexus 5
Click to expand...
Click to collapse
I guess all of these CPU speeds and undervolt can be changed at any time withouth erasing anythign right?
nad4321 said:
Thanks again From your own experience what would you recommend TWRP or CWM
Click to expand...
Click to collapse
Philz touch. Its cwm based, more features than twrp and cwm put together and more stable than both too.
-----------------------
Sent via tapatalk.
I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit
nad4321 said:
I guess all of these CPU speeds and undervolt can be changed at any time withouth erasing anythign right?
Click to expand...
Click to collapse
You can set up virtually any configuration with Franco. But, again, I suggest you try his default settings first. He put a lot into figuring it out, and his findings likely are the most reliable. I've never felt the need to customize the kernel any differently.
Some people, however, really like to mess around with the settings as a kind of hobby. I used to do so, and it's a lot of fun (and headaches). So, if you want to get into it, go for it. There are numerous apps you can use to tweak all those settings.
Sent from my Nexus 5
---------- Post added at 07:03 AM ---------- Previous post was at 07:01 AM ----------
rootSU said:
Philz touch. Its cwm based, more features than twrp and cwm put together and more stable than both too...
Click to expand...
Click to collapse
I know, I've been meaning to check out out. Thanks
Sent from my Nexus 5
PhilipTD said:
You can set up virtually any configuration with Franco. But, again, I suggest you try his default settings first. He put a lot into figuring it out, and his findings likely are the most reliable. I've never felt the need to customize the kernel any differently.
Some people, however, really like to mess around with the settings as a kind of hobby. I used to do so, and it's a lot of fun (and headaches). So, if you want to get into it, go for it. There are numerous apps you can use to tweak all those settings.
Sent from my Nexus 5
---------- Post added at 07:03 AM ---------- Previous post was at 07:01 AM ----------
I know, I've been meaning to check out out. Thanks
Sent from my Nexus 5
Click to expand...
Click to collapse
I noticed that by default it has 2 cores working and then uses the other 2 when required... This might sound stupid but did stock already do this?
Try greenify and xposed framework.
https://play.google.com/store/apps/details?id=com.oasisfeng.greenify‎
Im running the catalysm rom + franco kernel undervolted (which by the way decreases the temperature) and under clocked to 1728mhz. I also am using greenify + xposed. Finally I turn off location reporting, touch sounds, always scanning wifi and set location to "battery saving" mode. Without any gaming I get around 5hr of screen on time. Straight gaming gives me around 2.5hr of SOT. Usually I get around 4hr from my regular day. Any other tips for battery?

battery drain

hi i have the usual problem with my samsung galaxy S i9003: my battery drains extremely quickly. on the battery usage it shows that the display is what is draining my battry the most, but the problem is, it is on its lowest. i just don't know what to do, i wiped the battery stats, i downloaded lots of programs to save battery, i removed the google backup transport apk, i don't use wifi, 3g, gps, bluetooth, i don't play games, i really don't know what else to do.
so please, help me.
i bought the phone from another person, so it's been already used.
i'm on gingerbread DDLF2, i'm rooted and have already tried a few roms but had the same problem, if you know of good, stable, smooth and for daily use rom please let me know.
ps: my phone doesn't show real battery stats, what i mean is, when the phone is on 30% it just shuts off, and when i plug it and turn it on, it shows 0%. it has happened since the day i got it.
ps2: i don't know if this matters but, i soft-bricked my phone like two weeks ago trying to restore the stock rom from a remics rom, and flashed the stock rom to get it back.
the battery drain problem has been there since before but i just wanted to put it out there to see if it helps.
luligorla said:
hi i have the usual problem with my samsung galaxy S i9003: my battery drains extremely quickly. on the battery usage it shows that the display is what is draining my battry the most, but the problem is, it is on its lowest. i just don't know what to do, i wiped the battery stats, i downloaded lots of programs to save battery, i removed the google backup transport apk, i don't use wifi, 3g, gps, bluetooth, i don't play games, i really don't know what else to do.
so please, help me.
i'm on gingerbread DDLF2
Click to expand...
Click to collapse
can you tell me for how many hours your battery lasts after fully charged.
battery usage also depends on cpu usage ( like if u have set your processor limits to high ) or may be because you have lots of apps running in the background. you can try installing watchdog application to trace whose eating up your battery
swapnilpx said:
can you tell me for how many hours your battery lasts after fully charged.
battery usage also depends on cpu usage ( like if u have set your processor limits to high ) or may be because you have lots of apps running in the background. you can try installing watchdog application to trace whose eating up your battery
Click to expand...
Click to collapse
I experienced battery drain too on GB ROM. I guess that newer apps are using android functions that are not coded very efficiently on GB.
I was surprised that battery life got much better after flashin to 4.4 kitkat. If you want to give it a try, I definitely recommend trying out flashing your device and see whether battery life improves
yes.... can try out different rom or some other kernels too. and try changing processor to some battery friendly mode like " conservative " or tweak the default processor to save battery.
and try out greenify app if you are not using. @luligorla
---------- Post added at 07:41 AM ---------- Previous post was at 07:41 AM ----------
yes.... can try out different rom or some other kernels too. and try changing processor to some battery friendly mode like " conservative " or tweak the default processor to save battery.
and try out greenify app if you are not using. @luligorla
swapnilpx said:
can you tell me for how many hours your battery lasts after fully charged.
battery usage also depends on cpu usage ( like if u have set your processor limits to high ) or may be because you have lots of apps running in the background. you can try installing watchdog application to trace whose eating up your battery
Click to expand...
Click to collapse
my battery last for about three or four hours if not less. i'll try downloading that app, but anyway the problem here is that in battery usage in shows that display is what is spending the battery the most, when it is on its lowest, i just don't get it.
huedrant said:
I experienced battery drain too on GB ROM. I guess that newer apps are using android functions that are not coded very efficiently on GB.
I was surprised that battery life got much better after flashin to 4.4 kitkat. If you want to give it a try, I definitely recommend trying out flashing your device and see whether battery life improves
Click to expand...
Click to collapse
can you tell what rom are you on? i just can't find a good i9003 rom, all of them are way too laggy and i need my phone for daily use.
swapnilpx said:
yes.... can try out different rom or some other kernels too. and try changing processor to some battery friendly mode like " conservative " or tweak the default processor to save battery.
and try out greenify app if you are not using. @luligorla
---------- Post added at 07:41 AM ---------- Previous post was at 07:41 AM ----------
yes.... can try out different rom or some other kernels too. and try changing processor to some battery friendly mode like " conservative " or tweak the default processor to save battery.
and try out greenify app if you are not using. @luligorla
Click to expand...
Click to collapse
and how do i change the processor?
luligorla said:
and how do i change the processor?
Click to expand...
Click to collapse
iam now doubtful if you are rooted... if yes use setcpu application to do so.
press thanx if i helped
---------- Post added at 10:24 PM ---------- Previous post was at 10:19 PM ----------
luligorla said:
my battery last for about three or four hours if not less. i'll try downloading that app, but anyway the problem here is that in battery usage in shows that display is what is spending the battery the most, when it is on its lowest, i just don't get it.
Click to expand...
Click to collapse
bro dont worry about that display thing.. its normal that display uses the most battery.. seeing your phone usage and battery.... its not normal... your battery does frain faster.. why dont u try flashing some other stable rom...
swapnilpx said:
iam now doubtful if you are rooted... if yes use setcpu application to do so.
press thanx if i helped
---------- Post added at 10:24 PM ---------- Previous post was at 10:19 PM ----------
bro dont worry about that display thing.. its normal that display uses the most battery.. seeing your phone usage and battery.... its not normal... your battery does frain faster.. why dont u try flashing some other stable rom...
Click to expand...
Click to collapse
i'm rooted, indeed, but it seems i'm not finding that application or if i have to download one. i downloaded whatdog and the only alert i got was about the gallery using the cpu.
what i'm worried about is that the display is literally on 0%, isn't it weird?
i tried flashing 2 different roms and with both the battery drained just the same. if you know about any stable, smooth and for daily use rom please let me know!
luligorla said:
i'm rooted, indeed, but it seems i'm not finding that application or if i have to download one. i downloaded whatdog and the only alert i got was about the gallery using the cpu.
what i'm worried about is that the display is literally on 0%, isn't it weird?
i tried flashing 2 different roms and with both the battery drained just the same. if you know about any stable, smooth and for daily use rom please let me know!
Click to expand...
Click to collapse
GOOGLE SOMETHING !!
for me.. xgamerz rom (4.1.2 ) is good .. at present iam on 4.3 (slim bean ) this rom is also very good...
and bro iam busy with my studies these days.. so may not reply further.. but ill try have fun .
swapnilpx said:
GOOGLE SOMETHING !!
for me.. xgamerz rom (4.1.2 ) is good .. at present iam on 4.3 (slim bean ) this rom is also very good...
and bro iam busy with my studies these days.. so may not reply further.. but ill try have fun .
Click to expand...
Click to collapse
excuse me but i've tried lots of roms, i'm not a noob its just that i cant find a good one for daily use.
sorry to bother you, i'll try slim bean and tell you.
good luck
luligorla said:
excuse me but i've tried lots of roms, i'm not a noob its just that i cant find a good one for daily use.
sorry to bother you, i'll try slim bean and tell you.
good luck
Click to expand...
Click to collapse
haha sorry to say but i really thought you were a noob.. if i'd knew this earlier, i wouldnt have replied so many times..
i faced many problems while i was a noob.. just dont want any other noob to face it

[Q] Whats the point of using custom kernel ?

What exactly do i get if i will flash custom kernel to my hammerhead ? What do they provide to make it noticeable to an user ?
m4nu4l said:
What exactly do i get if i will flash custom kernel to my hammerhead ? What do they provide to make it noticeable to an user ?
Click to expand...
Click to collapse
Custom kernels provide improvements, tweaks and more power to the user.
Some provide patches to use certain mods... E.g. Multirom patched kernels
Others allow your phone to be overclocked and undervolted. (Both CPU & GPU)
Some just save more battery than others, some have display tweaks included allowing the user to copy Samsung's saturated screens or even lower saturation.
Remember, not all kernels are compatible with all roms.
Read on the bases of the roms and kernel compatibility!
Happy flashing and good luck!
Valdorous said:
Custom kernels provide improvements, tweaks and more power to the user.
Some provide patches to use certain mods... E.g. Multirom patched kernels
Others allow your phone to be overclocked and undervolted. (Both CPU & GPU)
Some just save more battery than others, some have display tweaks included allowing the user to copy Samsung's saturated screens or even lower saturation.
Remember, not all kernels are compatible with all roms.
Read on the bases of the roms and kernel compatibility!
Happy flashing and good luck!
Click to expand...
Click to collapse
Thanks for the explanation, feels like i'm not the guy who would need to overclock my nexus 5, its fast enough for me out of the box. Multi-rom sounds attracting tho.
Stock kernel works just fine
Sent from my Nexus 5 using XDA Premium 4 mobile app
m4nu4l said:
Thanks for the explanation, feels like i'm not the guy who would need to overclock my nexus 5, its fast enough for me out of the box. Multi-rom sounds attracting tho.
Click to expand...
Click to collapse
One thing I forgot to mention are also the sound tweaks!
There are a LOT out there that are really good, although the App Viper4Android will always reign superior!
I do recommend you have a look at some of the kernels.
You can get 150% out of your battery with the right rom/kernel combo and probably more if you sacrifice some performance.
Just saying it's something a lot of people don't experiment with, I personally am a flash-aholic and need to flash new kernels and roms every other day!
Valdorous said:
I do recommend you have a look at some of the kernels.
You can get 150% out of your battery with the right rom/kernel combo and probably more if you sacrifice some performance.
Click to expand...
Click to collapse
not true.
battery life is dependant on how you personally use your phone, how you set it up, what apps you use, and the quality of your phone/data connection. everything else, including kernels, play a very minor role in battery.
simms22 said:
not true.
battery life is dependant on how you personally use your phone, how you set it up, what apps you use, and the quality of your phone/data connection. everything else, including kernels, play a very minor role in battery.
Click to expand...
Click to collapse
Not necessarily, depending on the govenor (that comes with the kernel) your phone can idle better and some kernels have adjustments to the LMK (LowMemoryKiller) which handles background apps differently.
So in my opinion with the same usage and different handling of background apps, including undervolting and a battery saving governor.
You could easily hit 150% of the usual battery life,
Kernels play in that matter a HUGE role.
You could even throw in some display tweaks (in the battery's favour).
Valdorous said:
Not necessarily, depending on the govenor (that comes with the kernel) your phone can idle better and some kernels have adjustments to the LMK (LowMemoryKiller) which handles background apps differently.
So in my opinion with the same usage and different handling of background apps, including undervolting and a battery saving governor.
You could easily hit 150% of the usual battery life,
Kernels play in that matter a HUGE role.
You could even throw in some display tweaks (in the battery's favour).
Click to expand...
Click to collapse
first off, your "battery saving" govornor doesnt exist. it would depend on exactly what you are doing with the phone. the governor doesnt save battery, it tells your cpu how to behave with the incoming need. and they dont control how your phone idle. i use ondemand, and i doubt many phones idle better than mine.
undervolting DOES NOT save you battery, it can even use more than if not undervolted. the only benefit you will get from undervolting is a little less heat.
and again, kernels do not play a role in battery. if they did, every single person would be using the same battery saving kernel. but we are not. with every single kernel someone will have great battery, and someome will have terrible battery. that's because how ypu use it and your quality phone/data connection pre-decides what your battery will be like.
what you are believing are rumors. stuff people dont really know much about, but still keep repeating the non truth over and over. in reality, kernels have almost no influence in battery.
and btw, everything you can control with a custom kernel, you can with the stock kernel. and people get just as great battery on stock than on a custom kernel.
and yes, i do know what im talking about, ive been part of trinity kernel for 5 years now. and ive helped thousands with android and android related issues, including battery.
simms22 said:
first off, your "battery saving" govornor doesnt exist. it would depend on exactly what you are doing with the phone. the governor doesnt save battery, it tells your cpu how to behave with the incoming need. and they dont control how your phone idle. i use ondemand, and i doubt many phones idle better than mine.
undervolting DOES NOT save you battery, it can even use more than if not undervolted. the only benefit you will get from undervolting is a little less heat.
and again, kernels do not play a role in battery. if they did, every single person would be using the same battery saving kernel. but we are not. with every single kernel someone will have great battery, and someome will have terrible battery. that's because how ypu use it and your quality phone/data connection pre-decides what your battery will be like.
what you are believing are rumors. stuff people dont really know much about, but still keep repeating the non truth over and over. in reality, kernels have almost no influence in battery.
and btw, everything you can control with a custom kernel, you can with the stock kernel. and people get just as great battery on stock than on a custom kernel.
and yes, i do know what im talking about, ive been part of trinity kernel for 5 years now. and ive helped thousands with android and android related issues, including battery.
Click to expand...
Click to collapse
I know and have used your kernel.
If you noticed I said "In my opinion". No reason to get aggressive.
I have noticed something else.
And thought it worth sharing.
If I've offended you, I apologize.
Valdorous said:
I know and have used your kernel.
If you noticed I said "In my opinion". No reason to get aggressive.
I have noticed something else.
And thought it worth sharing.
If I've offended you, I apologize.
Click to expand...
Click to collapse
oh gosh, please dont apologize. i also meant no offence to you.
its not you i am aggressive with btw, its that false info that just wont die. i had still many people do, but its not as bad as before. you dont need to wipe anything when flashing kernels. but, many people used to insist that its a must. i spent a lot of time fighting that falsehood, now i dont see it as much. its the same about battery. if there was a "magic" pill, everyone would be using it. but just as many people using any random kernel will get great battery life on a "battery" saving kernel, and just as many people will get bad battery life as well.
please, again, i didnt mean offence. im just trying to pass the truth around, thats all. its just that this kind of thing isnt an opinion, there is a truth and a false here. id never go against any persons opinion if it was just about opinion.
Yeah....at best....just changing from one kernel to another MAY affect your battery about 5 to 10 percent one way or the other. In other words.....the direct affect on battery is minimal.
The biggest myth in the threads are that rom/kernel combos make big differences in battery life.
Simply put, they don't.
And everything @simms22 said. ?
---------- Post added at 07:59 PM ---------- Previous post was at 07:57 PM ----------
And in modern devices anyway....undervolting does nothing but keep heat down a bit.....and under clocking has an extremely minor affect as well.
Don't believe, try it and see. ?
I get the same battery life on any ROM....any kernel.
You can make your own ultra powersaving mode or your own hyper performance mode...
I'm just using custom kernel for gamma control, s2w/s2s (which is very useful for me when reading some articles on Chrome), also for USB OTG mounting. Oh oh, and also for killing time, you know messing up with frequency and stuff lol
Well, personally I never believe about the effect on battery life by using this or that kernel since there are lots of things that can affect your battery life, and for my case data connection is the battery killer :angel:
What are you guys talking about??. No, I'm not a kernel dev BUT I have tried so many ROM's and kernels on different devices for a long time now and by experience I can say that they DO influence battery life. I have seen %~50 increase (compared to stock) and aso have experienced just 4 hours of battery because a buggy kernel patch.
They're not placebo when your device start to last 19 hours instead of just 13 like it did since you bought It.
lovetatfitties said:
What are you guys talking about??. No, I'm not a kernel dev BUT I have tried so many ROM's and kernels on different devices for a long time now and by experience I can say that they DO influence battery life. I have seen %~50 increase (compared to stock) and aso have experienced just 4 hours of battery because a buggy kernel patch.
They're not placebo when your device start to last 19 hours instead of just 13 like it did since you bought It.
Click to expand...
Click to collapse
your cpu is set up differently with the custom kernel. thats why. its not the kernel itself. you can set up your cpu on stock so itll be like the custom kernel. its very easy if you are familiar with a few scripts and the root filesystems. for example, i run trinity kernel. with the way trinity kernel sets up my cpu, i get better than stock kernel in battery. trinity set my cpu to run all four cores always on, no hotplugging. it also disables mpdecision. i can set up the stock kernel that way as well. i can do it using a root file explorer, manually, or i can do it via script. and i do know people that run the stock kernel that just get fabulous battery life.
---------- Post added at 10:21 PM ---------- Previous post was at 09:55 PM ----------
there are things that you can do with kernel control apps as well.
Sometimes when you flash a kernel...and many times we flash a ROM right before.....you are only getting rid of a battery issue you previously had before you flashed. So with the clean start, of course you're battery will be much better (especially if you had an unfixed or unnoticed issue before)....and sorry to put it this way, but don't know how else to put it....but the less knowledgeable people think its the new kernel that's made such a huge. Pretty much all the most experienced people know kernels don't make a very big difference to battery life. You can flash clean stock with stock kernel and see a huge gain too if you had an issue before.
Test it yourselves. Flash your favorite ROM and some kernel one day. Go a few battery cycles without changing much or installing much. Then flash the same ROM and another kernel. Same changes and same few apps. And so on...
Eventually you'll get the point.
KJ said:
Sometimes when you flash a kernel...and many times we flash a ROM right before.....you are only getting rid of a battery issue you previously had before you flashed. So with the clean start, of course you're battery will be much better (especially if you had an unfixed or unnoticed issue before)....and sorry to put it this way, but don't know how else to put it....but the less knowledgeable people think its the new kernel that's made such a huge. Pretty much all the most experienced people know kernels don't make a very big difference to battery life. You can flash clean stock with stock kernel and see a huge gain too if you had an issue before.
Test it yourselves. Flash your favorite ROM and some kernel one day. Go a few battery cycles without changing much or installing much. Then flash the same ROM and another kernel. Same changes and same few apps. And so on...
Eventually you'll get the point.
Click to expand...
Click to collapse
That right!
It's all about how you feel about your devices.
simms22 said:
your cpu is set up differently with the custom kernel. thats why. its not the kernel itself. you can set up your cpu on stock so itll be like the custom kernel. its very easy if you are familiar with a few scripts and the root filesystems. for example, i run trinity kernel. with the way trinity kernel sets up my cpu, i get better than stock kernel in battery. trinity set my cpu to run all four cores always on, no hotplugging. it also disables mpdecision. i can set up the stock kernel that way as well. i can do it using a root file explorer, manually, or i can do it via script. and i do know people that run the stock kernel that just get fabulous battery life.
---------- Post added at 10:21 PM ---------- Previous post was at 09:55 PM ----------
there are things that you can do with kernel control apps as well.
Click to expand...
Click to collapse
Ok man whatever, I don't like to argue about the color of the sky so.. Yeah..
Also, I think you should e-mail all the kernel devs and tell them that they're full of bs and that they all are wasting their time improving nothing. You should try to reach Linus Torvalds and tell him that he has to stop developing worthless software, that we all can mod our systems the way we want'em to behave and that we don't need support for newer technology. :good:
lovetatfitties said:
Ok man whatever, I don't like to argue about the color of the sky so.. Yeah..
Also, I think you should e-mail all the kernel devs and tell them that they're full of bs and that they all are wasting their time improving nothing. You should try to reach Linus Torvalds and tell him that he has to stop developing worthless software, that we all can mod our systems the way we want'em to behave and that we don't need support for newer technology. :good:
Click to expand...
Click to collapse
It's a good job YOU know what you're talking about, otherwise this thread would have been worthless
The point is you can do some customizations with custom kernels. Gamma control, usb fast charge, etc etc.
But battery life? I never see the difference even with the similar usage that I always do every single day, really, I'm living in Indonesia and the data connection is the battery killer that makes me swearing aaaaall the time lol
I have tried that kernel this kernel (except caf kernel), you name it, but still nothing different, except each of them has their own characteristics.
My own solution? I bought a powerbank, that's my magic pill when my phone is out of battery.
Please, don't think I'm bashing kernel devs out there, they do fantastic job with their creations and I hope they don't stop doing that, I myself using ElementalX, because I need the features that the dev offers to user like me.
Sorry if my English is that bad :/
lovetatfitties said:
Ok man whatever, I don't like to argue about the color of the sky so.. Yeah..
Also, I think you should e-mail all the kernel devs and tell them that they're full of bs and that they all are wasting their time improving nothing. You should try to reach Linus Torvalds and tell him that he has to stop developing worthless software, that we all can mod our systems the way we want'em to behave and that we don't need support for newer technology. :good:
Click to expand...
Click to collapse
Sent from my Nexus 5 using Tapatalk

Categories

Resources