I constantly use my tab with wifi at home and I have noticed that when my tab comes off standby (after unlocking screen) it connects to wifi, it never used to to happen. Running stock ICS, anyone started experiencing this? I think this is also why my tab runs hot and battery drains.
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I think I may have solved my issue, under advance wifi settings I selected to "Always" have wifi on during sleep. My battery is not draining as much as before.
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Last week when the Onavo data monitor app appeared prominently placed on the market home screen I gave it a try.
Unfortunately it created a very annoying bug on my phone running JVU and Semaphore 2.5:
whenever my phone looses it's wifi connection for any reason it will not recognize and connect to available wifi anymore even if placed directly near the router with full signal strength!
The only way to get it connected again is switching wifi off and then on again...
I already uninstalled the app and did a factory reset but nothing changed. Probably it messed up some system files that don't get touched during factory reset.
As I'm in vacation now and don't have my data cable with me to flash a fresh firmware, is there any way to resolve this issue in other means?
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Nobody here with any idea how to resolve this? It's really annoying as even battery consumption goes up very much when the phone looses wifi and auto connects to 3g.
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I have no idea about your problem. I also have just installed Onavo on JVU firmware for a couple days, but everything is still ok....
So, I'm thinking the cause is from your router!! Why don't you try another wifi network?
Good luck!! ^^
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Thanks for your answer! It doesn't depend on my router. As I said I'm in vacation right now and therefor using many different available hotspots, it happens on all of them... :-(
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Any issues with battery drain and onavo? Cause it was sucking mine dry!! I thought it was semaphore's fault (i'm on icssgs 4.2) until i figure it out and uninstalled it. Now it is Almost as prior installing onavo. I have a feeling that it left some garbage behind though.
It definitely left some garbage behind and this thread is about to find out how to get rid of it.
Battery drain was and unfortunately still is very high on my device thanks to the non desired 3g connection instead of wifi...
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Try to flash a new kernel again. It may help you updating some files that control wifi.
I used onavo for couple of days, battery drains. Its functions already in ICS roms, Less but good.
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Thank you so much! That did the trick. The onavo garbage seems to be gone for good now.
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You are welcome,
Could you please tell us about the battery usage. Do you noticed some changes in battery life?
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I have the option checked under wifi, but in the battery graph it shows wifi being on constantly and i feel like the battery is draining faster than it should. Any way to check for sure?
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Hello-
Ever since I updated to 4.2 and especially 4.2.1, battery life has not been the same. Today I went from 100% last night to 73% in 22 hours just in standby. I didn't change any settings that I can remember. Can anyone please help with this?
Thanks,
wws12
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I had the same battery issues on 4.2 in standby...even with wifi disabled. I ended up flashing back to 4.1.2 and battery is back to normal. To me 4.1.2 is more stable and much smoother. Hopefully Google will fix these issues in the next update.
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I noticed that a large portion of the battery is being used by something called "Media server" Any idea what that is or how to turn it off?
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I'm also noticing the same sleep mode battery drain on 4.2.1,around 1% per hour..
I need to root my tablet to downgrade?
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Use media scanner root from the play site and disable the media scanner. Then this battery drain should reduce.
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ashwinrajsr said:
Use media scanner root from the play site and disable the media scanner. Then this battery drain should reduce.
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Do I need to be rooted for this?
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wws12 said:
Do I need to be rooted for this?
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Click to collapse
Yes. Root access is a must.
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I think in my case most of the battery issues was from the device being new and the software stats still needed more time to be accurate, that has happened to me on my Sony tablet also..
Now I can see some real stats as I use better battery stats app for keeping track of the battery.
I use my tablet as a use when needed device because it's not my notifications device that is always connected, for that I use my smartphone. That said I turn on airplane mode when I'm not using it and sync when needed as well.
Só when my Nexus 7 is in sleep mode it has very few apps and services running other than the system ones.
So the stats I came up with are:
1% in sleep mode with airplane mode on and Google Now and Location History turned on..
And..
0.3% in sleep mode with airplane mode and Google Now plus Location History off..
So for me no Google Now as I don't need that much.. It lasts 3x more in standby without it... And the truth is, in my country Google now for me isn't that useful as it is although I'm sure someday will be..
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It's strange...with stock 4.2.1 no root I haven't any battery drain... 0.7% /hour with wifi on and sync enabled...In the battery stats, even if in a hour i turn on the display on a minute, the display takes at least 40% of battery...
I have been having a problem with battery drain on 4.2.2 from wakelocks.
If I am away from known wifi I have no problems, but as soon as I am within range of a known wifi network the phone will no longer spend any time in deep sleep.
Also I flashed google's stock 4.2.2 rom from fastboot, it is currently unrooted with the stock kernel.
Here is what I have found so far:
-the wakelock that is occuring is suspend_backoff,
-wifi is set to always on.
-the wakelock stops as soon as wifi is turned off, and is completely unassociated with any running apps, including Chrome, it happens right from boot.
Re: [Q] 4.2.2 battery drain on WiFi
Hmmm. I'm having no issues with WiFi drain. I've been in the opposite side of my house from my router all day too.
Maybe try a re-flash.
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Re: [Q] 4.2.2 battery drain on WiFi
Maybe the router? I only say this because I had on old dlink that refused to let two older android devices (tablet and phone) sleep. At work it was fine. Are you using cpuspy to confirm?
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Thanks for the replies!
Originally I updated to 4.2.2 using the ota, and when I had the battery drain I wiped all partitions and reflashed everything, so I don't think that is the issue.
It may be the router, I have a Netgear, and other android and webOS devices have had problems with it... let me try using a different one.
Edit: Turns out it was the WiFi network! after switching deep sleep has started to creep back up.
Thanks for the help!
Re: [Q] 4.2.2 battery drain on WiFi
Edit: For some reason my tapatalk app randomly posted this. Weird.
Re: [Q] 4.2.2 battery drain on WiFi
Ha....a netgear is what I switched to. I haven't gotten 4.2.2 yet so crossing fingers.
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rxnelson said:
Ha....a netgear is what I switched to. I haven't gotten 4.2.2 yet so crossing fingers.
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hmm, mines always had problems... it's a WNDR3400, I hope you're is better than this one!
I have had random battery loss dinner the 4'2 upgrade. I think I know why. If I stay on one WiFi router I'm okay. But when I go to work my tablet does not go into deep sleep. I think it is searching for a WiFi signal. I have 3 wireless routers at work and since I am the sys admin my tablet is associated with all of them. When I open the tablet and lock onto a WiFi signal then it will go to sleep.
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billwinkle said:
I have had random battery loss dinner the 4'2 upgrade. I think I know why. If I stay on one WiFi router I'm okay. But when I go to work my tablet does not go into deep sleep. I think it is searching for a WiFi signal. I have 3 wireless routers at work and since I am the sys admin my tablet is associated with all of them. When I open the tablet and lock onto a WiFi signal then it will go to sleep.
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Click to expand...
Click to collapse
Download GSAM from the play store for a more detailed report. Im getting battery loss becuase of "android System" and "Media"
Looks like a nice tool. Thank you.
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