Vbus_wake_lock wakelock keeping the phone awake
I've been following these forums every now and then and was very helpful when I encounter some minor problems so far.
But lately I start having a very strange problem on my mom's phone which is a Samsung Galaxy Win (i8552- stock rom- android 4.1.2) and couldn't really find a decent solution or a good explanation so far. So I decided to ask you guys.
The problem is phone is having a bit poor bettery life overall, especially while in idle. I found out most of the times it is losing 2-3% battery per hour while idling (i.e overnight). Sometimes it's slightly more 1% per hour and sometimes between 0.5-1% (which sounds more normal).
While in idle usually Androis OS seems eating up the battery around 50-60%. I disabled most of the notifications, most of the sync options (especially google ones), all kinds of screen sounds, facebook update intervals, uninstalled Avast and also disabled the location access. But these changes didn't really give a noticable difference. Battery drain inconsistency was still there.
After I noticed this strange battery drain I decided to digging it up a bit more and installed GSM Battery and wakelock detector.
Firs that I noticed in GSM battery is that the phone is awake for like 1.5 hours out of 7-8 hours of overnight idling. And Android OS kernel seemed responsible for this. But couldn't really get more clues.
Then I found more clues on the culprit in Wakelock Detector under "kernel wakelocks" tab. Which is vbus_wake_lock wakelock.
WD shows vbus_wake_lock is awake for almost an hour after the last charge, which was 7 hours ago.
After I found this I googled around a bit but couldn't really found a useful explanation except it might be caused by an apple charger. But I know that mom's using the original samsung charger.
I tried rebooting to see if it helps. It's been almost 4 hours now, phone lost around 2% battery which seems ok-ish but the vbus_wake_lock is still there with 25 minutes of awake.
So any idea. What should I do to hunt this wakelock down?
I don't really want to make her worried about her phone though, she seems happy with it, since she is playing some games and charging it every day so not really having a battery issues. But I know that there's something wrong here and I want to fix it.
So I desperately need your helps guys.
Thanks a lot.
Sorry for my English btw, as it's not my native.
Best,
I've been following these forums every now and then and was very helpful when I encounter some minor problems so far.
But lately I start having a very strange problem on my mom's phone which is a Samsung Galaxy Win (i8552- stock rom- android 4.1.2) and couldn't really find a decent solution or a good explanation so far. So I decided to ask you guys.
The problem is phone is having a bit poor bettery life overall, especially while in idle. I found out most of the times it is losing 2-3% battery per hour while idling (i.e overnight). Sometimes it's slightly more 1% per hour and sometimes between 0.5-1% (which sounds more normal).
While in idle usually Androis OS seems eating up the battery around 50-60%. I disabled most of the notifications, most of the sync options (especially google ones), all kinds of screen sounds, facebook update intervals, uninstalled Avast and also disabled the location access. But these changes didn't really give a noticable difference. Battery drain inconsistency was still there.
After I noticed this strange battery drain I decided to digging it up a bit more and installed GSM Battery and wakelock detector.
Firs that I noticed in GSM battery is that the phone is awake for like 1.5 hours out of 7-8 hours of overnight idling. And Android OS kernel seemed responsible for this. But couldn't really get more clues.
Then I found more clues on the culprit in Wakelock Detector under "kernel wakelocks" tab. Which is vbus_wake_lock wakelock.
WD shows vbus_wake_lock is awake for almost an hour after the last charge, which was 7 hours ago.
After I found this I googled around a bit but couldn't really found a useful explanation except it might be caused by an apple charger. But I know that mom's using the original samsung charger.
I tried rebooting to see if it helps. It's been almost 4 hours now, phone lost around 2% battery which seems ok-ish but the vbus_wake_lock is still there with 25 minutes of awake.
So any idea. What should I do to hunt this wakelock down?
I don't really want to make her worried about her phone though, she seems happy with it, since she is playing some games and charging it every day so not really having a battery issues. But I know that there's something wrong here and I want to fix it.
So I desperately need your helps guys.
Thanks a lot.
Sorry for my English btw, as it's not my native.
Best,
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