Android OS killing battery

thebatsam · Dec 11, 2011

Hey everyone

Got a Nexus a couple weeks ago after having iphones for a couple years. Loving it so far.....ICS is very polished.

Initially, my battery life was adequate. However, recently the OS is using 45% battery and the phone gets a very hot when idle (I can feel the heat in my pocket)

I did a factory reset and still the same problems.

Is anyone else coming across these issues?

Chirality · Dec 11, 2011

An old bug cropping up again?

http://xdaforums.com/showpost.php?p=13247149&postcount=57

Can you please install Watchdog (https://market.android.com/details?id=com.zomut.watchdoglite) and let us know if it's the suspend process (which shows up in the battery meter as part of "Android OS") burning through the battery?

mnexusaud · Dec 11, 2011

My phone has been on standby for about a day and has 80% battery left. However the battery consumption shows:

42% Android OS
37% Phone Idle
16% Cell Standby

- Also what is the difference between phone idle and cell standby

MY BACKGROUND APPS RUNNING ARE:
- Battery Monitor Widget (I need this on so I can tell what my battery life is easily)
- Google Services (What is this, can I kill it?)
Media (What is this app, can I kill it?)
Music (Again what is this, what happens if I kill it/should I? I never used it.)

dmh11 · Dec 12, 2011

I have the same problem. My SGN died after 7 hours without any usage.

Sent from my Optimus 2X using XDA App

Black Mirror · Dec 12, 2011

Yup, me too. This morning, I took my phone off the charger at 98% for an hour and 15 minutes and didn't touch it. The battery had gone down to 88%, with Android OS using 64% and Android System using 14%. The phone was 'awake' for the entire period. I've had my Nexus since Wednesday and I haven't been getting great battery life. I'm hoping there's a fix for this.

VoicesX · Dec 12, 2011

Same problem here... (I testing radio UGKK7, XXKK7 and XXKK1... all with the same problem).

- Lightflow increment "Android OS" battery use.
- By using, Wi-Fi "Android OS" uses less battery.

inspiron41 · Dec 12, 2011

try disable wifi when not on and unchecked "use wifi network" for location.

another thing could be some active widgets, i remember this was a problem a while back.

s1977 · Dec 12, 2011

Note sure that this has got to do with wifi at all as I reset my phone to factory and I still have the 'Android OS' usage taking 23% of battery. I have no apps nor have I yet linked phone to my Google account.

I have read some comments to do with the Galaxy S2 which too suffered from the same problem. I remember reading something about Samsung driver implementation causing this with the S2. I will update the links when I find something conclusive. Also I have another HTC desire that has the AOSP code compiled rom and that does not suffer from this at all and it is happily sitting idle at almost 2 days with nearly 70% battery still left.

Chirality · Dec 12, 2011

s1977 said:
Note sure that this has got to do with wifi at all as I reset my phone to factory and I still have the 'Android OS' usage taking 23% of battery. I have no apps nor have I yet linked phone to my Google account.

I have read some comments to do with the Galaxy S2 which too suffered from the same problem. I remember reading something about Samsung driver implementation causing this with the S2. I will update the links when I find something conclusive. Also I have another HTC desire that has the AOSP code compiled rom and that does not suffer from this at all and it is happily sitting idle at almost 2 days with nearly 70% battery still left.

Yes, the problem was with the suspend process eating up CPU. You can install Watchdog and set it to watch non-Android processes, and that will be able to tell you which "Android OS" process is actually the one eating up battery.

ljwnow · Dec 12, 2011

Chirality said:
Yes, the problem was with the suspend process eating up CPU. You can install Watchdog and set it to watch non-Android processes, and that will be able to tell you which "Android OS" process is actually the one eating up battery.

Is samsung aware of this problem? We need to file complaints.

Sent from my Galaxy Nexus using xda premium

xHausx · Dec 12, 2011

Do you have your email or anything set up to receive things instantly? That can have a noticeable impact on your battery if so

s1977 · Dec 12, 2011

Thanks Chirality, but I assume that this is happening to all users? Samsung have seen this before so shouldn't this be fixed from the very start? Wrong person to ask this question to, but it is annoying..

Anyways I will install Watchdog like you say, but unless I can kill the 'suspend' process, I am helpless.

---------- Post added at 10:00 AM ---------- Previous post was at 09:58 AM ----------

xHausx said:
Do you have your email or anything set up to receive things instantly? That can have a noticeable impact on your battery if so

No, that's why I reset the phone to factory settings and the current behaviour is without any apps, or registration with google, no emails, nothing installed.

---------- Post added at 10:03 AM ---------- Previous post was at 10:00 AM ----------

Additional links indicating the problem and response:
http://androidforums.com/samsung-galaxy-s2-international/337492-s2-battery-drain-problem-solved-now.html
http://code.google.com/p/android/issues/detail?id=16721

xHausx · Dec 12, 2011

Is there anything in the logcats that could hint to a problem? Like errors or something unusual that it keeps repeating

luffyp · Dec 12, 2011

I have the same problem with high system CPU usage. I used SystemPanel to monitor the phone (unplugged, standby mode) during my 8-hour sleep and here's the results.

The System Processes were using 49min of CPU time while the phone was idle

When I clicked on the system processes I got a list of individual processes. Anyone knows what are there kworker processes for?

When I clicked on one of the System Processes (kworker/u:1), I got its CPU usage. It was doing something almost the whole time

Finally, I should also mention that the phone lost about 7% in these 8-hour test. Seems ok but I think it would be even better when this high system CPU usage is fixed.

s1977 · Dec 12, 2011

xHausx said:
Is there anything in the logcats that could hint to a problem? Like errors or something unusual that it keeps repeating

Hmm...Now that you asked this, I remember watching logcat output and was getting a null Notification event almost one every minute a couple of days back. I therefore proceeded to uninstall all my widgets/apps but I could not reach to a conclusive outcome.

Anyways as Chirality pointed out this post (Link) indicates a 'suspend' process issue. And this guy identified the process causing it (Link), I think!

xHausx · Dec 12, 2011

s1977 said:
Hmm...Now that you asked this, I remember watching logcat output and was getting a null Notification event almost one every minute a couple of days back. I therefore proceeded to uninstall all my widgets/apps but I could not reach to a conclusive outcome.

Anyways as Chirality pointed out this post (Link) indicates a 'suspend' process issue. And this guy identified the process causing it (Link), I think!

A driver issue definitely sounds plausible but there are also a lot of things different between these two phones, especially between GB and ICS.

Watching /proc/kmsg should show something if it is an issue with the kernel

s1977 · Dec 12, 2011

xHausx said:
A driver issue definitely sounds plausible but there are also a lot of things different between these two phones, especially between GB and ICS.

Watching /proc/kmsg should show something if it is an issue with the kernel

Do i need to be rooted to be able to read this?

s1977 · Dec 12, 2011

Chirality said:
Yes, the problem was with the suspend process eating up CPU. You can install Watchdog and set it to watch non-Android processes, and that will be able to tell you which "Android OS" process is actually the one eating up battery.

Chrality, xHausx

I have installed Watchdog and set the settings to what you indicated. I am a bit confused around the app, so I have added screenshots to update you of the data at my end.

Do let me whether you see the issue immediately or need any further information.

paulpenny · Dec 12, 2011

My experience is somewhat the same.

Out of the box battery life seemed pretty good. After the update to fix the volume issue I started to notice that the battery would fall even when the phone was idle. Android OS was the culprit. I am now running MCR and I have the same issue.

It's not terrible battery life, but it's substantially worse than it was out of the box.

I did wonder if the problem was related to how they fixed the volume bug. Is something always running to pick up the volume bug problem and deal with it when it happens?

Just a thought.

Black Mirror · Dec 12, 2011

paulpenny said:
My experience is somewhat the same.

I did wonder if the problem was related to how they fixed the volume bug. Is something always running to pick up the volume bug problem and deal with it when it happens?

Just a thought.

Interesting. I've been thinking the same thing, and the annoying thing about that is the problem doesn't affect my network (T-Mobile), so I could be getting reduced battery performance for no reason! Ah well.

Android OS killing battery

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