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[CM9 beta] Battery Optimization Discussion

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By wtogami, Retired Recognized Developer on 8th March 2012, 04:35 AM
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8th March 2012, 05:58 PM |#11  
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Don't overlook the AudioOut_1 wakelock. Its my number one offender at the moment.

Minimize it by turning off screen selection sounds... System Settings / Sound / Touch sounds.

We need to figure out what the problem is with that.

On the good side, my mmc and deleted wake locks are negligible so far on beta.
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8th March 2012, 07:33 PM |#12  
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Quote:
Originally Posted by Liner81

Don't overlook the AudioOut_1 wakelock. Its my number one offender at the moment.

Minimize it by turning off screen selection sounds... System Settings / Sound / Touch sounds.

We need to figure out what the problem is with that.

On the good side, my mmc and deleted wake locks are negligible so far on beta.

Same for me. Think due to notification sounds mostly.
8th March 2012, 07:38 PM |#13  
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Quote:
Originally Posted by muyoso

Same for me. Think due to notification sounds mostly.

That's probably right. The only time I ever see that is playing music without headphones. I almost always have my phone on vibrate

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8th March 2012, 07:46 PM |#14  
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I get 39 minutes for vbus_present in the 6 hours since unplugged.

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9th March 2012, 12:15 AM |#15  
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Just want to say THANK YOU for this thread, and THANK YOU for such am awesome rom.

If I might be so bold to suggest, put a section on your page for "If you get worse battery life on this rom than your last rom, it may not be because of a problem with this rom, it may just be that way and there may be nothing that can be done about it because that's just the way it is."

I have had no problems with battery life, fwiw.


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9th March 2012, 08:27 AM |#16  
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"Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it."

Agreed... Right now 25%, 8 days 8 hours, 3 h 37 m awake, screen on 1 h 43 m
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9th March 2012, 10:11 AM |#17  
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Quote:
Originally Posted by XXCoder

"Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it."

Agreed... Right now 25%, 8 days 8 hours, 3 h 37 m awake, screen on 1 h 43 m

8 days? Airplane mode? Or is your battery over 9000....mah?

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9th March 2012, 11:04 AM |#18  
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Quote:
Originally Posted by XXCoder

"Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it."

Agreed... Right now 25%, 8 days 8 hours, 3 h 37 m awake, screen on 1 h 43 m

Pics or it didn't happen! And here's a battery tip. Don't install facebook or messenger. Ever.

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9th March 2012, 03:59 PM |#19  
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Just spend a day with CM9 Beta 0. It's a great rom with lots of promise. Great feel and look, very fast, ICS is fantastic.

That said, the battery life is not there yet. I basically set it up the same way I set up the stock rom. Email on Exchange push notification, EVERYTHING ELSE on manual sync. On a stock rom I usually am at about 40% after 12 hours of moderate use. About 5% drop an hour. On this rom I was at 75% after 2 hours. About 12% an hour. This is with the "stock" 1800 mAh battery.

If the devs can match the battery life of stock GB I'll be back. It really is a great rom, I just can't recharge twice a day, and I'm not carrying around a 3500mAh battery in my pocket either.

Seriously, great work to all the devs who have taken it this far. Looking forward to the next couple releases.
9th March 2012, 04:19 PM |#20  
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Quote:
Originally Posted by DCRocks

Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it.

I simply cannot believe the difference. Makes me think I'm gonna have to go out and get Juice Defender, and let it turn off data when I put the phone to sleep, it is just that dramatic.

I can call text, and play hours of games, and still have the battery have more juice remaining than it did over the same timeframe with just a call or two for usage with the data on.

I use JD for this and run it in extreme mode, which disables data until you physically enable it yourself (and after you enable it, it will disable again when the screen is off). Using it, I get a huge improvement in battery life, especially on CM9. It's kind of annoying having to enable it everytime you turn the screen back on, especially since it takes 4-5 seconds before data works again, but if it can give me the type of battery life it does, I am all for it. Other than the slightly noticeable lag I get compared to CM7 and other ROMs such as CleanGB (I know I can install supercharger, but I am talking pure stock CM9 here), I have no problems at all. Major props to all the developers involved for breathing new life into our OG Epics.
9th March 2012, 04:35 PM |#21  
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Same here, mmc_delayed_work and deleted_wake_locks are list toppers for wake locks. 41m of mmc_delayed_work since install of Beta 0. That said my battery life is great (over 24hr if screen time is 1:20h or less) BUT it could be amazing if mmc_delayed_work would go away. Seems that the phone wakes it self up for mmc_delayed_work randomly and constantly.

Only other bat related issue I'm seeing is that WiFi does not sleep as it is set to do all the time. I have it set to sleep when the screen is off and it does not always do that according to the stats.

Quote:
Originally Posted by spyderusa11

The mmc_delayed_work and deleted_wake_locks are driving me crazy. I know they've been reported as "false blames," but something, whether MMC or otherwise, definitely causes seemingly unnecessary wake locks, and there is a very clear pattern between high report percentage and battery drain.

I don't mean to take away from the optimizations suggested; they're definitely useful if you're looking to stretch the battery life out longer than typical stock capability. But for many of us, something wakes the phone a little too often, and it's very difficult to debug without disabling every single application and testing one at a time.

I guess the point is, has anyone else found a better way to figure out these wake locks?

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