I know this issue has been posted in forums for other devices, but I haven't seen anything about it for NC. I did try to search the NC forums but couldn't find anything that seemed to address this problem.
I am using MIUI 1.7.22. I have noticed significant battery drain due to Android OS (in battery stats), suspend (in the systempanel app), and event/o (also in systempanel). I have disabled auto-sync and any apps that appear to be likely culprits (those that might attempt to download data). This problem seems to appear with wifi on or off, and when on, I have tried both setting it to never turn off and to turn off when the screen is off. Initially I was experiencing battery drain due to cell standby, which I took care of by disabling the telephony provider, phone, and mms apks. I know many don't believe this has an effect, but I did it anyway. The cell standby drain is gone, but now I'm fighting the drain due to these other factors. Has anyone found a fix for this?
After scouting around for info, I have tried some suggestions seen elsewhere: rebooting and wiping dalvik cache. So far today I haven't had any Android OS, etc. issues. Standby life with screen off is as it should be (for now and hopefully forever)--very slow battery drain.
This is with wifi set to never shut off, which I prefer.
Suspend etc. came back last night although not as extreme as before. Hopefully some other folks will have things to add to this thread. I will continue posting progress info as I learn more about this.
From the code.google.com forums:
Confirm heavy battery drain with enabled Location & Security -> Use wireless networks / Use GPS satellites. I've disable both options and now my battery life is normal.
With enabled "Location & Security" options battery eaten by "Android OS" process (about 40-55%).
I will try this and report back.
Disabling WIFI and GPS in location/security had no effect. There appears to be a google process that prevents the system from sleeping.
I was still experiencing random battery drain due to Android OS, suspend, event/0 after switching to cm7. One suggestion I read was to disable calendar sync, as this appears to be a runaway process that attempts to connect to the server constantly without allowing the device to sleep. Doing this allowed me to get through the night with very little drain and the Android OS, etc. processes were finally behaving (within normal limits).
I'm not sure if anyone is reading this thread but I will continue to update until I figure out the solution, as I imagine this problem will become more noticeable to others who are equally frustrated with this issue.
Having same problems on my galaxy s2. Lots of people have this problem and think it's a problem with the os. What os version are you using?
memphisuklf said:
Having same problems on my galaxy s2. Lots of people have this problem and think it's a problem with the os. What os version are you using?
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Right now I'm using cm7 (2.3.5) but I was using MIUI before. Turning off calendar sync has worked well so far.
I had bad battery drain in the past and no deep sleep. but what worked for me was not to use any live wall paper. this fixed my deep sleep issues. for the battery drain, re-set your battery stats and re boot a couple of times for the stats to settle down. also check google map and latitude. in latitude just log out. un-checking sync in my yahoo email app also helped with my battery drain. my wifi is set at, off with screen. I went from 20 -30% drain in 7hrs to now 1-3% in 7hrs
I hope any of this info can help
cm7 n146
Thank you, boxcar. I had tried all of those things (froze live wallpaper, reset battery stats, reboot, froze maps and latitude) but the only thing that worked for me was unchecking the box for calendar sync. Email sync and wifi appear to be non-issues--no difference between off or on. Evidently this google calendar sync bug is a known issue (that very few people seem to know about!). I hope google will fix this soon.
I also have same problem on my Galaxy S2. These two(events/0, suspend) drain many battery, 14% one night, without WIFI, GPS, Bluetooth.
I'll keep on tracing this issue, and share the result in this thread.
arrowliu123 said:
I also have same problem on my Galaxy S2. These two(events/0, suspend) drain many battery, 14% one night, without WIFI, GPS, Bluetooth.
I'll keep on tracing this issue, and share the result in this thread.
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Turning off autosync seems to help the most (although setting WIFI to turn off when the screen turns off appears to help, as well). I tried using an autosync toggle but just turning it on at all seemed to result in a gradual creeping up of the Android OS, etc. problems. Manual sync of calendar and perhaps gmail and contacts seems to be the way to go. For some reason, exchange mail set to push results in no problems. The other trick I've found is to go to applications, then calendar and calendar storage, and force stop, delete cache, and THEN manual sync of calendar (reboot, recovery, wipe dalvik, fix permissions are good ideas, too). When I flash nightlies, I go through this process and the offending processes work as they should. If I don't, problems appear sooner or later.
I've had my nook on for 9 hours now, WIFI on (off with screen off) and 30 minutes of display on time. I've lost 9%, so I think I'm on the right track. This is how it should work, I.think. Of course, the results SHOULD be the same with autosync on, but manual sync for good battery life is an acceptable small tradeoff in my opinion.
Sincitybronze said:
I've had my nook on for 9 hours now, WIFI on (off with screen off) and 30 minutes of display on time. I've lost 9%, so I think I'm on the right track. This is how it should work, I.think. Of course, the results SHOULD be the same with autosync on, but manual sync for good battery life is an acceptable small tradeoff in my opinion.
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For the noobs in the audience, how exactly does one turn off autosync? Where is it located?
Thanks in advance.
Puddynose said:
For the noobs in the audience, how exactly does one turn off autosync? Where is it located?
Thanks in advance.
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Menu, settings, accounts and sync (I leave background data checked).
I found part of the root cause, maybe some old application - can work on new version, but drain many battery. Today I uninstalled the 'Android photo widget', then only 1% battery has been drained within 2 hours when standby. Not totally solved the issue, but seems OK.
I guess you can also try this, find another 'bad' application which drains your battery.
Well guys, I'm not sure if I'm the last Nook Color user to continue fighting with this super annoying headache (I know SGS2 users are, too), but I think I'm on to something. I thought calendar sync was the culprit (and perhaps it was), but the Android OS drain (featuring nemeses suspend and event/0) would not go away and the arrival of this problem continued to be (apparently) random. I had an idea that, if the calendar sync kept alternating between suspend and event/0, perhaps this was due to old events that caused the sync process to continue longer than it would normally. So, based on this idea and logic, I changed my exchange e-mail account settings to sync email from the last month rather than to sync all mail. Looking at my work e-mail history, I realized I had e-mails in various folders and sent mail from as far back as 2001! Although it's nice to be able to access all e-mail history, perhaps the polling services were constantly monitoring the activity of super old emails and folders, which caused the suspend and event/0 processes to flip out. I don't know if this is the way Android actually works but it seemed logical to me. Well, for the last 24 hours, I have intermittently checked my cpu activity through systempanel, and what do you know, when the device is not being used, suspend and event/0 work as they are supposed to and Android OS stays low in the battery % list. PLEASE let this be the fix! I know there are other factors that contribute to the acting out of these processes, but on a stripped down device with no autosync or widgets and no out of control services identified in systempanel or watchdog, there can't be many other explanations. I'm curious if others with this problem have similar settings on their email accounts. In all the forums on different sites (and I've read a ton of them), I've never seen anything like this mentioned.
http://code.google.com/p/android/is...c=ID Type Status Owner Summary Stars&id=16721
Please vote there, and, may be, Google will fix it.
For those still following this thread, here's a tip. Use Gemini app manager (in the market). This has been one of the best tools I've found for managing wakelock issues and battery drain during standby. It allows you to identify apps that start up on their own (more than you think) and prevent them from starting randomly. In my experience this has been a huge cause of the standby drain problem showing up as Android OS, suspend, and event/0 in battery monitors. I'm currently sitting on 81% battery remaining with over 1 hour of screen time after 21 hours since my last charge. I know it's not a lot of usage but it's the standby time that's fantastic.
boxcar8028 said:
I had bad battery drain in the past and no deep sleep. but what worked for me was not to use any live wall paper. this fixed my deep sleep issues. for the battery drain, re-set your battery stats and re boot a couple of times for the stats to settle down. also check google map and latitude. in latitude just log out. un-checking sync in my yahoo email app also helped with my battery drain. my wifi is set at, off with screen. I went from 20 -30% drain in 7hrs to now 1-3% in 7hrs
I hope any of this info can help
cm7 n146
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Click to collapse
I've a Galaxy S2. Tried everything, except disable autosync. Was losing 30-40% battery at night. So far since turning off google sync I'm getting about <1% battery use an hour. Will see if it continues. Thanks.
I have a weird battery drain problem...(Bell I337M, latest firmware)
I realized mid-morning that I was dropping battery a LOT faster than I normally do. I don't use my phone much at work so after the course of a work day I'm usually left with around 85% battery remaining. Today, however, my battery dropped all the way down to just over 40%.
I checked the battery stats and saw that Android System was the next highest source of battery usage - with a "stay awake" time of over 12 hours so far. I installed BetterBatteryStats and it points to an Android System process called GCM_LIB holding the wakelock 100% of the time. My phone has not once dropped into deep sleep.
I think this may be the Google Cloud Messaging service, so I tried investigating every avenue I could. I've rebooted three times. I've removed every single account on my phone. I've stopped every push or polling application. GCM_LIB continues to hold the wakelock.
Any ideas? I really don't want to have to wipe the phone if I don't have to, I have everything configured just the way I want it to be.
got_milk said:
I have a weird battery drain problem...(Bell I337M, latest firmware)
I realized mid-morning that I was dropping battery a LOT faster than I normally do. I don't use my phone much at work so after the course of a work day I'm usually left with around 85% battery remaining. Today, however, my battery dropped all the way down to just over 40%.
I checked the battery stats and saw that Android System was the next highest source of battery usage - with a "stay awake" time of over 12 hours so far. I installed BetterBatteryStats and it points to an Android System process called GCM_LIB holding the wakelock 100% of the time. My phone has not once dropped into deep sleep.
I think this may be the Google Cloud Messaging service, so I tried investigating every avenue I could. I've rebooted three times. I've removed every single account on my phone. I've stopped every push or polling application. GCM_LIB continues to hold the wakelock.
Any ideas? I really don't want to have to wipe the phone if I don't have to, I have everything configured just the way I want it to be.
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Click to collapse
I had the android system drain when I used google edition roms but I fixed it by adding a few build.prop entries to make the phone sleep better. I didn't have this issue with stock touchwiz roms tho
Deeper Sleep / Better Battery Life
ro.ril.disable.power.collapse=1
pm.sleep_mode=1
Hi, some of our users said this.
As you can see from this screen: https://plus.google.com/communities/112636044705492129107 they have the same problem of you.
Have you found a solution?
GCM LIB is deprecated as per the GCM website, it has been superseded by GCM Server and GCM Client. Please use the GoogleCloudMessaging API instead of the GCM client helper library. The GCM server helper library is still valid.
There are a number of open bugs against GCM_LIB, including this one and I doubt they will be addressed.
Recently been getting battery drain while on Idle. This drain I tend to notice at night. My phone can idle duriing the day but does not drain battery.
I recently disabled Android system IQ agent .. and it seems to have helped at night after rebooting and stopping that service.
I also noticed when you go to task manager and go to settings there is an option to stop services. I checked Facebook (51 services wth). Google Play Books , Magazines, and Movies\TV. I also checked Google play services (65 services).
Believe it or not my phone seems to be running fine and my battery life is a lot better.
Now I set my brightness at 47% (not auto), Google Now is enabled with Wifi and mobile location. Google backup is enabled (most are unchecked including app data) Email is manual sync.
Just thought I"d pass this along. YMMV.
Thanks for your tips. I noticed random battery drain these few days, no idea what it is, high battery drain when idle, and it happens randomly. Will try and report back. Thanks
smallgreenbear said:
Thanks for your tips. I noticed random battery drain these few days, no idea what it is, high battery drain when idle, and it happens randomly. Will try and report back. Thanks
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What's the exact name of the apk / the service? Afaik I do not have any matching process so far...