Develop Bugs

Android system - partial wake lock - one solution found

I have my phone running 99.6% of the time in spare parts and it shows android system as the culprit holding a partial wakelock.
so my question is, how do i fix this? i've tried a factory reset three times, am updated to 1.21 ota and have slowly started to reintegrate apps but it always starts again and always after a different app.
i'm getting pretty frustrated anyone got any ideas?
UPDATE In my case it was network time abusing wireless location service that was causing the problem and hence the reason a factory reset didnt solve it, i switched off network time and voila!

just to clarify, no live wallpapers, and phone is in airplane mode to avoid any data usage drainig the battery.
i have got beautiful widgets homescreen small clock and pure cal widget installed at the moment but even when i uninstall them it doesnt fix it, also im running launcher pro 0.4.2 but also had the problem when i reverted to sense.
and i have read every other thread here about battery life that i could find but no-one seems to have this problemo

anyone with any advice on why my phone wont sleep?

A long shot, but go in to Mobile Settings and untick Enable always-on mobile data.

Philosoma said:
A long shot, but go in to Mobile Settings and untick Enable always-on mobile data.
Click to expand...
Click to collapse
ok cool, giving that i try now but i had been leaving it in airplane mode to try and take the vagaries of data out of the equation.
this started about a week ago and i really noticed it when i was in a 6 hour long meeting and my battery basically draines 60% even though the phone was in airplane mode

ok tried that but with my phone just factory reset, airplane mode and no apps installed other than spare parts it's showing running 94.1 % of the time and all of it is android system.
that cant be right
i have restored data, maybe i shouldnt restore data either but that just seems plain crazy

Re: Android system - partial wake lock
What exact foreground and background processes/services do you have running when this is happening, any idea?
Apps like System Panel can show you them and some useful other details. That is certainly too high.
-------------------------------------
- Sent via my HTC Desire -

th3 said:
What exact foreground and background processes/services do you have running when this is happening, any idea?
Apps like System Panel can show you them and some useful other details. That is certainly too high.
-------------------------------------
- Sent via my HTC Desire -
Click to expand...
Click to collapse
ok right now there is
com.android.syncml.service
sense
market
messages
people
rss reader
syncml provider
sys panel
touch input
updater
and then a load of inactive cached applications
do you see anything unusual there?

ok so i downloaded system app and killed all apps except excluded and sytem apps and my running usage has gone down, now thats no suprise in and of itself but now i need to see if it stays down.
i've just checked again and the percentage is still going down, so it's either an inactive app which i didnt list ( is that even possible if its inactive) or one of the items i listed above.
has anyone got any thoughts.

What do the logs say upon going to standby? (Use aLogcat to watch/save system log).

I had same problem I tried the turning off network always on to off, didn't change anything. the thing that worked for me was turning off my flickr account!? For some reason it kept my calendar awake so keeping system from sleeping, don't ask me why as I can't figure it out, though since doing this I'm now getting up to 2 days of average use from the battery. Also I've done the usual of reducing the different accounts sync timings etc.
Have you typed *#*#4636#*#* into the phone key pad to look at what is happening? This can give valuable info on what's draining the battery.

Jazd71 said:
I had same problem I tried the turning off network always on to off, didn't change anything. the thing that worked for me was turning off my flickr account!? For some reason it kept my calendar awake so keeping system from sleeping, don't ask me why as I can't figure it out, though since doing this I'm now getting up to 2 days of average use from the battery. Also I've done the usual of reducing the different accounts sync timings etc.
Have you typed *#*#4636#*#* into the phone key pad to look at what is happening? This can give valuable info on what's draining the battery.
Click to expand...
Click to collapse
I have the same problem as OP since the latest update. The *#*#4636#*#* code is not helping in this case. The partial wake lock is displayed as Android System - which doesn't tell me anything.
I read something about the Calendar issues but I am unable to stop the calendar in running processes.
How did you solve your problem?

ferus said:
I have the same problem as OP since the latest update. The *#*#4636#*#* code is not helping in this case. The partial wake lock is displayed as Android System - which doesn't tell me anything.
I read something about the Calendar issues but I am unable to stop the calendar in running processes.
How did you solve your problem?
Click to expand...
Click to collapse
Ok i seem to have had some luck since last night though i'm not sure of the exact reason.
i did as th3 said and downloaded system monitor and then killed all background active and inactive tasks and that seems to have solved the problem. I have no idea why that would be the case though and i am watching it carefully to see if it stays fixed.
i dont have a flickr account setup

djet said:
What do the logs say upon going to standby? (Use aLogcat to watch/save system log).
Click to expand...
Click to collapse
Djet, I installed alogcat and have found all references to wakelock, rather than post the entire log
D/PowerManagerService( 77): wakelock: PARTIAL_WAKE_LOCK 'NetworkLocation Check Location' activated (minState=0)
D/PowerManagerService( 77): wakelock: PARTIAL_WAKE_LOCK 'NetworkLocation Check Location' activated (minState=0)
D/PowerManagerService( 77): wakelock: PARTIAL_WAKE_LOCK 'keyguardWakeAndHandOff' activated (minState=0)
D/PowerManagerService( 77): wakelock: FULL_WAKE_LOCK 'keyguard'ACQUIRE_CAUSES_WAKEUP activated (minState=3)
there are also some entries in red like this one
E/vold ( 53): Unable to lookup media '/devices/platform/msm_sdcc.1/mmc_host/mmc0/mmc0:0001'
and a load of errors to do with global search etc but this is all pretty much gobbledegook to me, what am i looking for?
thanks

ok so based on that log i have switched of the use wireless networks to find my location (not gps i hardly ever use that anyway) and now the running % is dropping fast.
i will keep you posted as to whether it keeps coming down or not.
it is going to be an enormous bummer if i cant use wireless location, thats one of a smartphones greatest powers, why would this suddenly start happening now ( started about a week before the ota update) and continues even when i factory reset.

kinkade said:
ok so based on that log i have switched of the use wireless networks to find my location (not gps i hardly ever use that anyway) and now the running % is dropping fast.
i will keep you posted as to whether it keeps coming down or not.
it is going to be an enormous bummer if i cant use wireless location, thats one of a smartphones greatest powers, why would this suddenly start happening now ( started about a week before the ota update) and continues even when i factory reset.
Click to expand...
Click to collapse
I suppose it's not the feature itself guilty but the applications using it. I had the same issue with battery running out because of Location service wake locks. It turned out one of the Locale app plugins was abusing this service. Having it uninstalled battery run became normal.

djet said:
I suppose it's not the feature itself guilty but the applications using it. I had the same issue with battery running out because of Location service wake locks. It turned out one of the Locale app plugins was abusing this service. Having it uninstalled battery run became normal.
Click to expand...
Click to collapse
Yes i know what you mean, how did you go about diagnosing that? also i have done several factory resets and it still happens

Re: Android system - partial wake lock
There are a many app settings that drain battery and the stock setup is nothing I am fond of. Location/locale was one of them for me, calendar, network time and widget/app syncs being the others. A non-stock app causing such problems was NetCounter.
Calendar was fixed by killing it and restarting it. It's a known bug for many.
If many widgets are running sync very often, then you can imagine battery draining fast.
-------------------------------------
- Sent via my HTC Desire -

th3 said:
There are a many app settings that drain battery and the stock setup is nothing I am fond of. Location/locale was one of them for me, calendar, network time and widget/app syncs being the others. A non-stock app causing such problems was NetCounter.
Calendar was fixed by killing it and restarting it. It's a known bug for many.
If many widgets are running sync very often, then you can imagine battery draining fast.
-------------------------------------
- Sent via my HTC Desire -
Click to expand...
Click to collapse
th3 you are legend, it was network time, i switched that off and all is now well in the world. cheers dude

Good find. I had the thing off anyway, but it is good to know.

[GUIDE] Battery Saving Steps/Mods/Roms | 7/6

Battery Save Like RandomKing​
I find myself regularly repeating many of these suggestions on many threads to many different people on how to extend your battery life. When not in use, my phone loses at most only 1-2% battery per hour! So I'm making one thread in the Epic forums dedicated to maximizing battery life while trying to explain why these steps will work. Some battery improvements come at the cost of performance or lack of certain services. This must be distinctly understood, or nothing wonderful can come of these steps.
Step 1: Brightness & Battery​
Let's face it. Our Android phone screens are huge. This feature is the largest, and completely unavoidable battery-drain. The only way to limit it is to not use the screen... ergo... not use your phone. But that clearly makes no sense, so how to limit that drain? Well, a good step is to turn down your screen's brightness to the lowest you can read clearly, don't hurt your eyes! For night-time use, there's an app that can turn the brightness down even lower called Screen Filter(Thanks to iModMM for the find!). Also, choose a nice dark background, something in the black color range. For all phones, the darker the color, the less brightness used, less power consumed! But for our Epic's Super Amoled screen, specifically, a black pixel is technically an "off" pixel. That's right, every black pixel on your screen is a part of your screen not being powered, since the Super Amoled does not need backlighting. Blackle is also a good alternative to the standard Google site for a black themed search engine, though it doesn't seem to be mobile optimized. Also, lock your screen with that nice little button on the top right side of your phone. Don't wait for it to lock itself! As far as the battery itself goes, charging to 100% can be tricky. The moment that led turns blue, your phone has generally reached 100%, but it will generally trickle charge between 97 and 100 after that. A good way to charge to 100 percent is to use an external charger, which generally come with 1 or 2 spare batteries for about $20. This way, the moment your battery dies, shut down, and pop a fresh one in.
Step 2: Using a Custom Rom​
At this point, there are many Epic 4G custom roms out, and if you're in this forum, you've likely rooted or are trying to root. Well I will not go into rooting directions here. Take a look at one and see how it fare's out-of-the-box for you. If you choose to use my customized rom, you will find a task manager with a preset ignore list, ready to use as a one-tap app-closing widget; as well as the service-freezing patch mentioned below in Step 8 ready for execution through a terminal, and my entire setup(among many other mods, apps, and tweaks tested for the greatest battery performance). These are just roms I've used myself to great results. Many others exist. Updated 7/6:
RandomKing's Customized Rom
2.2.1 EC05 v.1 Plus [Journaled w/Genocide 1.0] [Screenshots]
SyndicateFrozen Rom
2.2.1 EC05 v.1.2
Bonsai Rom
2.2.1 EC05 v.4.1.1 Not Supported on XDA. Sorry.
Midnight Rom
2.2.1 EC05 v.5.3
Step 3: Disable Unnecessary Services​
First and foremost, disable all location services, wifi and gps based. This will affect certain apps like weather apps, you'll simply have to deal with static locations. Next, disable data sync. Contacts will not synchronize with Gmail while this is off. You will have to enable it sporadically. The Gmail app also will not function while this is off, I recommend using the email app and simply adjusting the refresh interval. You can always manually check your own email . Likewise, you may put your phone into airplane mode altogether if you don't plan to use it for an extended period of time, such as school, work, swim meet, movies, or on an airplane.
Step 4: Task Killers and JuiceDefender​
First, let's get JuiceDefender out of the way. It's a neat app, and in certain ways, effective. However, it's own effectiveness comes with certain contradictions. It disables nearly all signals, which will include, for example, Google Voice. In my experience, this app hindered certain other services, and if anything may have drawn further on my battery. My recommendation is to stay away from it. Now onto Task Killers, they are good, and they are evil. Let me explain. Many of us may find issues closing all the apps we open, and sometimes forget we left something open. A task killer can easily ensure that you've closed all of your programs. Now onto the bad. Task killers can try to kill certain system services. This is generally BAD. Certain services shouldn't be killed, and others can't be killed, and the ongoing battle only further drains your battery while trying to kill services that AREN'T actually bad. So on that note, the worst part of task killers is AUTO-KILL. Disable it! Kill it! Kill it with FIRE! I use Advanced or Adao Task Killer, with no auto-kill. It is one of the only widgets I use, and I simply tap it before I lock my phone each time.
Step 5: Widgets​
If you don't need them, don't use them. Almost all widgets make continuous unnecessary calls to the Android system, and this can be a huge battery draw. Even simple widgets. Through all my testing, there's only 2 widgets I have approved thus far: Advanced Task Killer, Power Control. Other disapproved widgets: Pandora, Winamp, Weather(ALL OF THEM), etc.
Step 6: SetCpu, Voltage Control, and Over/Underclocking​
As with much of this thread, this is opinionated and empirical theories. Through my testing, Overclocking is unnecessary, and guaranteed to draw on the battery. Most of these roms come from fantastic devs and are, by default, blazingly fast. Overclocking is completely redundant in my opinion, and I'm generally all about speed. Underclocking/undervolting may preserve more battery, but my opinion on the matter is similar to my feeling on widgets. If you don't need it, don't do it. If you feel the need to use these apps, a generally accepted setting for battery preservation is to undervolt to 800 max. and 100 min. (if your phone can handle it, some may experience wake-locks, raise min. to 200) on conservative governor, adjusting your profiles for when the phone is locked, unlocked and etc.
Step 7: Unnecessary Apps​
Free apps are great, aren't they? But how many have you gathered, just because they're free? Now how many of those don't you use, but regularly draw on your phone regardless. There's an easy way to roughly check. Open your settings. Now go to Applications. Manage Applications. Take a look at which are running that you have not opened. Using a task killer prior, and waiting a couple minutes to see what re-opens may be a good way to check which apps are continuously running in the background and evaluate if they can be removed.
Facebook --- Notorious for running in the background. Disabling notifications may help.
Latitude --- Largest offender of location service usage. Neat app. Huge battery hog.
QIK/Fring --- Any video chatter really. If you don't use them, remove or disable them.
Browser --- Large ram usage. Try Dolphin Mini or Miren.​
Step 8: Freeze Services​
Using Titanium Backup Pro, MyBackup Pro, or Bloat Freezer (yes, non-free apps) freeze any of the following services:
sns --- (Will disable sns)
snsaccount --- (Will disable Facebook contact integration)
drm --- (May affect media programs like mediahub)
drmcontent --- (May affect media programs like mediahub)
systemupdater --- (Best disabled if on custom rom)​
Enter the following commands into the Android Terminal to manually freeze the above services:
Code:
su
pm disable com.sec.android.providers.drm
pm disable com.sec.android.app.sns
pm disable com.samsung
Simply enter the previous commands into the Android Terminal while substituting "enable" for "disable" to manually defrost these.
If you would like a shortcut for this method, check out the patch in This Thread Also Included In RandomKing's Rom..​
Step 9: Journaling​
Journaling... some love it, some hate it. The fact remains, journaling enables extra write cycles. While this will prevent data loss, it also means more cpu usage. It follows that battery should last longer with journaling disabled. You can use chris41g's mod HERE to turn Journaling on/off at will.
Step 10: Turn it Off and Spend Time With Loved Ones​
That's right. You're obsessing with your phone. Leave it be. Do something meaningful and memorable. Have fun with life! This is just a phone.
More coming as it comes to me! Including mods, apps, etc. aimed at improving battery life. Feel free to leave your own suggestions or questions! If this guide and it's features have helped you in anyway, leave THANKS so I know whether or not to keep up on it!​

Y is this in q&a?
Sent from my Nexus S 4G using XDA Premium App

Because its an answer to many questions posted here.
-Sent from my Random Epic.

many good suggestions here RandomKing.
this stuff is all so useful to us newer users out here, maybe this should be stickied (either here or in general).

jarcher1971 said:
many good suggestions here RandomKing.
this stuff is all so useful to us newer users out here, maybe this should be stickied (either here or in general).
Click to expand...
Click to collapse
Thanks! I have no control over where this belongs, I just know its an answer to many questions and would be noticed here.
-Sent from my Random Epic.

has anyone noticed an effect on the phone's ability to sleep when you manually reorder the apps alphabetically in the app drawer? I kept having problems and factory reset 2x. Now I did find 3 troublesome apps that although not apparently running in the background, kept my phone from sleeping simply by being installed. I also stopped ordering my apps, deleted the troublesome apps and now it seems my phone is working correctly. I wonder if that (editing the default order) could also prevent the phone from sleeping? Any thoughts?

rando991 said:
has anyone noticed an effect on the phone's ability to sleep when you manually reorder the apps alphabetically in the app drawer? I kept having problems and factory reset 2x. Now I did find 3 troublesome apps that although not apparently running in the background, kept my phone from sleeping simply by being installed. I also stopped ordering my apps, deleted the troublesome apps and now it seems my phone is working correctly. I wonder if that (editing the default order) could also prevent the phone from sleeping? Any thoughts?
Click to expand...
Click to collapse
Can't say I've noticed this, but I've been on launcherpro for quite some time now. Perhaps you could share more details on your setup?
-Sent from my Random Epic.

I'm non rooted stock EC05. I used to use EDIT in the app drawer to rearrange my apps in alphabetical order (they don't arrange themselves automatically this way after rebooting). I had noticed in spare parts that my phone was never sleeping and killing my battery. I did a factory reset and it worked as advertised. I slowly added apps back until I found two that seem to prevent my phone from sleeping so I uninstalled them. Phone worked fine for a while but then started acting up again. I repeated the procedure, leaving only the apps my wife's phone had (hers always sleeps like a baby), but then my phone started up again. Tried another reset but this time decided to leave the apps in the order they put themselves and so far so good...wondering if that was doing something or if it is an app update that goes bonkers?

rando991 said:
I'm non rooted stock EC05. I used to use EDIT in the app drawer to rearrange my apps in alphabetical order (they don't arrange themselves automatically this way after rebooting). I had noticed in spare parts that my phone was never sleeping and killing my battery. I did a factory reset and it worked as advertised. I slowly added apps back until I found two that seem to prevent my phone from sleeping so I uninstalled them. Phone worked fine for a while but then started acting up again. I repeated the procedure, leaving only the apps my wife's phone had (hers always sleeps like a baby), but then my phone started up again. Tried another reset but this time decided to leave the apps in the order they put themselves and so far so good...wondering if that was doing something or if it is an app update that goes bonkers?
Click to expand...
Click to collapse
Hmm. If you can't narrow it down to a certain app, I'm not totally sure what it could be. Have you tried clearing the data/cache of Twlauncher? You could try a launcher like LauncherPro, you don't have to be rooted to use a different one.

No but if the problem comes back up I will try some of those...these are the 3 apps that when loaded caused problems: NIV Bible, Document Scanner, [I now have relacement apps for each of these now] and most recently Espn Score Center, but my wife had all of thse but the doc scanner and had no problems

i would check in spare parts to see which apps may be holding a partial wake lock. for me the facebook app was not letting my phone sleep until i disable all of its notifications.

jarcher1971 said:
i would check in spare parts to see which apps may be holding a partial wake lock. for me the facebook app was not letting my phone sleep until i disable all of its notifications.
Click to expand...
Click to collapse
Likewise. This is why I removed facebook altogether. The new mobile site has proven to be pretty useful now.
-Sent from my Random Epic.

Yeah I found the same thing...but I would log out of Facebook too. Also the problem reappeared after a factory reset and I had not gone into Facebook. Are you saying that even if you don't log in, it can stop your phone from sleeping? My phone started doing it again a few days ago for no apparent reason, and I was able to stop that behavior by: finding and moving 2 apps from the phone to SD card (I thought I had gotten all of them), clearing any cache from different apps, and rebooting.

jarcher1971 said:
i would check in spare parts to see which apps may be holding a partial wake lock. for me the facebook app was not letting my phone sleep until i disable all of its notifications.
Click to expand...
Click to collapse
That wouldn't tell me anything when I had the problem. The only thing was Android System....and....the phone wouldn't sleep even if in airplane mode! Which meant it had to be a process or app doing it all the time. I had never thought to clear cache, but I wonder why doing that works? Also there's a menu option in Spare Parts about Button Behavior which leads you to believe you can make the phone sleep but the menu says "only available in Ver 1.5". I've checked the market and can't find a ver 1.5 Spare Parts...

rando991 said:
That wouldn't tell me anything when I had the problem. The only thing was Android System....and....the phone wouldn't sleep even if in airplane mode! Which meant it had to be a process or app doing it all the time. I had never thought to clear cache, but I wonder why doing that works? Also there's a menu option in Spare Parts about Button Behavior which leads you to believe you can make the phone sleep but the menu says "only available in Ver 1.5". I've checked the market and can't find a ver 1.5 Spare Parts...
Click to expand...
Click to collapse
I believe it means android 1.5, because that says "End Button Behavior", and no new phones have Call and End buttons on them. Because the "Fancy Screen Rotation" says 1.5 only also.
Sent from the only thing i need.

RandomKing said:
Step 6: Unnecessary Apps[/CENTER]
Free apps are great, aren't they? But how many have you gathered, just because they're free? Now how many of those don't you use, but regularly draw on your phone regardless. There's an easy way to roughly check. Open your settings. Now go to Applications. Manage Applications. Take a look at which are running that you have not opened. Using a task killer prior, and waiting a couple minutes to see what re-opens may be a good way to check which apps are continuously running in the background and evaluate if they can be removed.
Click to expand...
Click to collapse
I think you mean "Now go to Applications. Running Services." Going to Manage Applications will show all non-system applications and not tell you what is currently running, AFAICT.
Or am I mistaken?
Thanks for this thread.

prodigyplace said:
I think you mean "Now go to Applications. Running Services." Going to Manage Applications will show all non-system applications and not tell you what is currently running, AFAICT.
Or am I mistaken?
Thanks for this thread.
Click to expand...
Click to collapse
No, there is a "Running" tab inside Manage Applications. An app doesn't have to have a service to be running.
Sent from the only thing i need.

zanderman112 said:
No, there is a "Running" tab inside Manage Applications. An app doesn't have to have a service to be running.
Click to expand...
Click to collapse
Thanks for clarifying, Zanderman. Somehow I never noticed that tab before.

rando991 said:
That wouldn't tell me anything when I had the problem. The only thing was Android System....and....the phone wouldn't sleep even if in airplane mode! Which meant it had to be a process or app doing it all the time. I had never thought to clear cache, but I wonder why doing that works? Also there's a menu option in Spare Parts about Button Behavior which leads you to believe you can make the phone sleep but the menu says "only available in Ver 1.5". I've checked the market and can't find a ver 1.5 Spare Parts...
Click to expand...
Click to collapse
Sounds to me like a system process may be the cause rather than any particular application. For me also I had issues early on with the SNS service forcing itself to restart continually and being a battery drain. It usually takes a force stop on that service followed by clearing data in the sns app and rebooting to fix. Don't know if that will work for you, but hope it helps.
Sent from the communications console of the NX-01 using a universal translator

My tips you can add:
1. I always, no matter what, always have brightness on lowest setting! If you have a hard time seeing in sun, than do auto, but turn off when don't need to, I have on low 24/7. Then at night, I have this app called screen filter which lets you lower brightness then default setting(good on eyes).
2. I always have auto-sync off. If you want emails etc. configure with ur preferences. And most of the time background data. But with background data off, you don't have access to market and have to enable for use. Don't get notifications. Lately, haven't been getting WhatsApp messages. This is optional.
3. In wifi settings, network notification turned off. Haptic feedback and all vibration disabled. Sounds on key clicks or anything disabled. Auto rotate screen off. No window animations. Screen timeout, 15 seconds. Keyboard timeout, 3 seconds. In location, use wireless networks and gps satellites unchecked.
4. No live wallpaper! No bright colors! I use a black background for wallpaper!! Try to go a little dark, not bright, stay away from white! Id recommened, the full black wallpaper. Also on ur homescreen, avoid widgets! Especially ones that use live web feed like, facebook, scorecenter. These are battery suckers!
5. I delete all apps I do not use! Stock and user. Download titanium backup to fix this issue. I freeze, system updates, swype, drm content, drm content launcher, sns, snsaccount. I uninstall the stock browser, use dolphin!! I also uninstall, all sprint bloatware, my files, gmail, email, talk, news and weather. Uninstall all stock and user apps you don't use! Check spare parts to see what runs in the background that you don't use. Another thing to add, I uninstall swype and android keyboard and use better keyboard gingebread edition 8.
6. Disable refresh interval in facebook, do it manually when you are going to use it!
7. Use setcpu. Undervolt to 800max and 100min on conservative governor. Set profiles, when phone is locked and etc.
8. Now lets talk about juicedefender and task killers. Juice defender will work and is a good app! BUT: if ur a person like me, I text a lot in whatsapp and when u lock screen it disables data, so u wont get texts. Download it, take a look at it, try it out. I recommend using agressive mode. Now lets talk about task killers. Personally, I think they dont work at all, and actually waste battery then save it. I just would say don't use one, and use samsungs stock task killer(actually works!)
9. Use a custom rom and kernel. Always be up to date on updates. I usually use, SRF and midNight. All about preference.
10. Extended battery FTW!!! Buy a seidio extened battery! May cost some money, but will greatly increase battery!!! Or get a cheap asian knockoff on ebay.
11. Disable data and put phone into airplane mode when it wont be in use for a period of time. Like at school or work. I usually keep data off during school. You will see a difference with data on and off.
12. Always keep wifi, bluetooth, gps, 4g off when not in use. They will drain battery crazy!!! Wifi will search for networks constantly, same basic thing with gps and bluetooth.
13. Also do full charges!! At night shut off phone and let it charge for a good 8 hours. Then in morning, turn on still plugged in. The charging indicator will be red, leave it alone till its blue. Go get dressed and eat some breakfast lol. Then when you come back it should be blue. And when on boot, let it finish media scanning, don't interrupt it!!
I can guarentee if you follow my tips, you will see a significant increase in battery life!
These are my tips!! I will add more if I can remember some more!
Typed this all on my Epic!!

Android OS wakelock

Hello everybody.
I have recently rooted my phone to try and identify the cause to my fast battery drain, which is primarily from the Android OS process.
I can't seem to find it. I see that the process "system" is working a lot and that the Android OS is awake for way to long.
Maybe you guys can point out something I'm missing here.
I would appreciate every help from you !
Thx

raied115 said:
Hello everybody.
I have recently rooted my phone to try and identify the cause to my fast battery drain, which is primarily from the Android OS process.
I can't seem to find it. I see that the process "system" is working a lot and that the Android OS is awake for way to long.
Maybe you guys can point out something I'm missing here.
I would appreciate every help from you !
Thx
Click to expand...
Click to collapse
This really could be anything. I recently had this and experimented for days whenever I took a break. For me, it turns out that it was my work's wifi hotspot making my phone stay awake to stay connected. I turned off wifi and it was fixed. But this isn't a solution. I ended up connecting to my own wireless repeater and problem was gone.
Bottom line is you'll have to figure out what's going on yourself.

htr5 said:
This really could be anything. I recently had this and experimented for days whenever I took a break. For me, it turns out that it was my work's wifi hotspot making my phone stay awake to stay connected. I turned off wifi and it was fixed. But this isn't a solution. I ended up connecting to my own wireless repeater and problem was gone.
Bottom line is you'll have to figure out what's going on yourself.
Click to expand...
Click to collapse
Thank you for your reply.
I couldn't find any cause to the problem, that's why I thought that maybe another pair of eyes (or more ) might help...

raied115 said:
Thank you for your reply.
I couldn't find any cause to the problem, that's why I thought that maybe another pair of eyes (or more ) might help...
Click to expand...
Click to collapse
I'll tell you what I've done for battery life on my phone and maybe on of those will fix your problem.
1. Uninstall stock bloat (only the stuff actually running in the background; no need to remove stock launcher ect.)
2. Disable Wi-Fi scanning when wifi off
3. Use Amplify to limit wakelocks and alarms
4. Freeze the apps you don't regularly use. I have a titanium backup widget on my homescreen that will unfreeze snapchat and launch it. It is the pressed again to freeze it after use.
5. Greenify apps you don't want running in the background for no good reason. If you get the donate version, you can still get GCM notifications so it's win win. For apps that don't have GCM notifications, it will coalesce the notifications so your phone doesn't wake up as often.
6. Make sure you have all logging turned off from the LG hidden menu.
7. If you're on a bad wi-fi network run by work/school, then get the auto disable IPv6 app on the play store.
8. Use the HEBF Optimzer app to prevent Google wakelocks and battery drains.
9. Use PNF Root app on the play store to custom choose how often your phone checks for GCM notifications.
With these changes, I finish the day with around 4 hours of screen on time doing regular things. Don't believe the posts about 7-8 hours SOT because you don't know what they were doing. I once used my phone as a timer while studying and had the screen on for 3 hours and only drained 12% battery.

absolutely the same issue here. No luck with factory reset, not using whatsapp or messenger, not using wifi, not using mobile data, no luck with any kind of debloating, uninstalling, installing greenify, amplify whatever. In the end, the Android OS will come back and drain the battery. I've spent a way too much time on this issue.

kakaovnik said:
absolutely the same issue here. No luck with factory reset, not using whatsapp or messenger, not using wifi, not using mobile data, no luck with any kind of debloating, uninstalling, installing greenify, amplify whatever. In the end, the Android OS will come back and drain the battery. I've spent a way too much time on this issue.
Click to expand...
Click to collapse
Try clearing the Google Play Services data, then removing all Google accounts and then adding them back. This time, make sure not to agree to any data collection.
When you turn GPS on, it should show as GPS only in the location settings. Disagree to any prompts.
If your location defaults to high energy GPS and networks, then try flicking the toggle on and off very quickly after you have cleared the play services data. This is how I got the prompt for data collection to come back. It's annoying and you have to always disagree but it fixed my mysterious battery drains from android os.

How to prevent apps from getting killed

Hi all,
I'm running several apps that should run all the time (AdGuard, Network Speed Meter) or for a long time (speed trap warner,...) but OxygenOS kills them after a certain period. Some of them restart automatically, some don't. Of course all of these apps are 'not battery optimized'. Is there any chance to prevent OxygenOS from killing them?
Are there custom ROMs that can overcome this problen?
I'm on the latest OxygenOS Pie Beta, but the behavior was similar on Android O...
Thanks a lot,
W

Did you try locking the app via recents menu?

Thank for the info, didn't know that.
Unfortunately it doesn't help, Adguard and the network monitor don't appear in recents. The speed trap warner automatically starts and stops when I'm in the car, i don't want to open recents manually every time.

Battery - Battery optimisation - Don't optimise

safwankatharudheen said:
Battery - Battery optimisation - Don't optimise
Click to expand...
Click to collapse
This is not changing anything,e ven with disable battery disabled, even with adaptative battery disabled.

I have the same problem. I have not found any solution whatsoever. This is really frustrating. I've made sure apps aren't optimized. Advanced optimization is disabled. Developer options background limit is at standard. I've pinned the apps in recent apps and it still happens. Apps get killed all the time.
For example,
1. I use Google Fit to start tracking a run. Within 10 minutes of tracking, the app is closed and workout not tracked. Its not even like i touched the phone and opened other apps during this.
2. I have VoIP account setup in the default dialer. Calls come through only 50% of the time cause the dialer is closed.
3. YouTube Music, constantly gets closed if i simply pause the music. Within 2 minutes, the app is closed.
4. Trying to transfer 15GB of files through Explorer app from phone to file server, never succeeds if i don't watch the app and keep the screen on.
5. Plex gets closed and therefore my photos don't auto backup with the phone is plugged in.
This is absolutely ridiculous! Why the hell a phone with 8GB of RAM is killing apps is beyond me!
Custom ROM on the same phone, like Lineage OS, no issues. Can have optimization on, battery manager on and all. In fact, battery life is better on custom when its not killing the apps! Seems to be the only solution until OOS can stop killing apps so aggressively.

M3drvr said:
I have the same problem. I have not found any solution whatsoever. This is really frustrating. I've made sure apps aren't optimized. Advanced optimization is disabled. Developer options background limit is at standard. I've pinned the apps in recent apps and it still happens. Apps get killed all the time.
For example,
1. I use Google Fit to start tracking a run. Within 10 minutes of tracking, the app is closed and workout not tracked. Its not even like i touched the phone and opened other apps during this.
2. I have VoIP account setup in the default dialer. Calls come through only 50% of the time cause the dialer is closed.
3. YouTube Music, constantly gets closed if i simply pause the music. Within 2 minutes, the app is closed.
4. Trying to transfer 15GB of files through Explorer app from phone to file server, never succeeds if i don't watch the app and keep the screen on.
5. Plex gets closed and therefore my photos don't auto backup with the phone is plugged in.
This is absolutely ridiculous! Why the hell a phone with 8GB of RAM is killing apps is beyond me!
Custom ROM on the same phone, like Lineage OS, no issues. Can have optimization on, battery manager on and all. In fact, battery life is better on custom when its not killing the apps! Seems to be the only solution until OOS can stop killing apps so aggressively.
Click to expand...
Click to collapse
My app is not killed when i lock it in the switch app menu

There's a whole website regarding that issue on several devices, maybe it helps: dontkillmyapp(dot)com/general#user-solution

Notifications Issues

I know this will be almost impossible to solve with suggestions, but some of my notifications don't come through until I unlock my phone. Most notably WhatsApp. I've turned off all battery optimisation options, removed it from the sleeping apps list, allowed background data and turned off data saver. Still have the same issue.
I have naptime installed so turned that off as well.
What's strange is that a few days ago all my notifications started coming through as normal for a few hours, and then stopped again.
I know the only way to solve this is probably a factory reset, but with loads of tweaks I've gotten it so my battery life is amazing. Leaving it overnight it drains around 3% and depending on how I use it I get around 8h of SOT with 50% battery left so I don't really want to factory reset.

What launcher are you using?

I feel your pain with factory resets.
There needs to be a backup settings to cloud so you can easily restore them after a reset or even a change of phone.

I understand your frustration with this issue, I experimented it as well when I started using my device, back then I did not fully knew about all the battery optimization settings, but, when trying to get all the notifications right, I stumbled upon an app named PNF-no root, which is meant to fix the push notifications from sms, email, whatsapp, etc, I tried so many things, that I honestly can not say if this PNF solved the issue, but in the end my notifications became normal, so, I kept using it, you can give it a try, that is, before you reset your phone, it might help

Do you at least move your phone? Because a lot of apps, to bypass the system's optimisation that put apps to sleep, is that their wake up workaround is gyroscopic based.
That's why WhatsApp and such use a lot the sensor while it has nothing to do about in the first place.
If a battery monitor works for you, you can check that for WhatsApp.

winol said:
I understand your frustration with this issue, I experimented it as well when I started using my device, back then I did not fully knew about all the battery optimization settings, but, when trying to get all the notifications right, I stumbled upon an app named PNF-no root, which is meant to fix the push notifications from sms, email, whatsapp, etc, I tried so many things, that I honestly can not say if this PNF solved the issue, but in the end my notifications became normal, so, I kept using it, you can give it a try, that is, before you reset your phone, it might help
Click to expand...
Click to collapse
Thanks I have installed it and will see if that works.

Nastrahl said:
Do you at least move your phone? Because a lot of apps, to bypass the system's optimisation that put apps to sleep, is that their wake up workaround is gyroscopic based.
That's why WhatsApp and such use a lot the sensor while it has nothing to do about in the first place.
If a battery monitor works for you, you can check that for WhatsApp.
Click to expand...
Click to collapse
Yes I've got it on me all day. It's never left anywhere for extended periods of time.

Nastrahl said:
Do you at least move your phone? Because a lot of apps, to bypass the system's optimisation that put apps to sleep, is that their wake up workaround is gyroscopic based.
That's why WhatsApp and such use a lot the sensor while it has nothing to do about in the first place.
If a battery monitor works for you, you can check that for WhatsApp.
Click to expand...
Click to collapse
Yes I've got it on me all day. It's never left anywhere for extended periods of time.

I've just installed a push notification tester app and my phone goes into doze immediately once I lock my phone and the screen turns off it seems.
If I request a notification, it comes through with the phone unlocked but if I set a delay of a few seconds and lock the phone before it comes through, nothing will happen until I wake my screen up.
Any ideas on how to solve this?

I worked out what the problem was!
I have a VPN that is set to disconnect when my screen turns off to save battery. At the same time I enabled the Android setting that blocks all connections without VPN. Of course when the screen turns off and the VPN disconnects, my phone was blocking all outside connections, hence me not getting any notifications.

Well, I am glad you figured it out