yashsingh1/xdaforums huggingface dataset:
[Asus  Eee Pad Transformer Prime] hairdewx:
Right... I'm going to need a bit more elaboration. What exactly about .13 is causing battery drain?

If you know that we have battery drain, period, then you certainly must know what is causing it.
[Asus  Eee Pad Transformer Prime] wokka00:
Left house at 100% this morning, didn't use much, but still syncing emails from my bag (chirping all day). At 96% now (after 10+ hours). What battery problem?

(Manually updated to .13, rooted. WiFi set to always on, GPS off, BT off, balanced mode, maybe 40% brightness)
[Asus  Eee Pad Transformer Prime] demandarin:
Actually .13 didn't. The minimum clock was raised since .11. There's already documentation in several threads talking about it even before .13 update came around. Its just that maybe you payed more attention this update n noticed it. So this issue of clocks raised didn't just happen on latest update. Actually occurs update or 2 before the latest. Search the threads n checks the dates n you will see.
[Asus  Eee Pad Transformer Prime] knives of ice:
i just got my first prime this saturday and the battery life is atrocious. lasts about 6 hours or so, nowhere close to the ipad like all the reviews claimed

so this issue is affecting the primes manufactured in Jan as well
[Asus  Eee Pad Transformer Prime] demandarin:
---------- Post added at 06:44 PM ---------- Previous post was at 06:20 PM ----------

Don't sweat it. Some people love to assume if something is affecting them, then it must be everyone. If you nit noticing the drain like others saying then don't let others convince you otherwise.

I guess I must be experiencing it to huh? Lmao I got this plus still have 50% or a lil more battery left. On moderate usage and deep sleep through last night. If I was experiencing it my battery would've been dead way before that time hit..lol. I'm good.
[Asus  Eee Pad Transformer Prime] the_game_master:
I picked up my tablet today, (see earlier post it was left behind over the weekend).

Well the keyboard dock battery was completely drained but the tablet itself had like 68% battery left.
[Asus  Eee Pad Transformer Prime] edster00:
I am not having excessive battery drain issues while my Prime is sleeping, not before the .13 update not after. Night after night I check it in the morning, 3% drop max.
[Asus  Eee Pad Transformer Prime] B-Mod:
After 19 hours with my prime sleeping my dock is at 99%, and the tablet is at 96%, no sleep issue here...........
[Asus  Eee Pad Transformer Prime] demandarin:
Damn! Lmfao. That's good as hell. I wanna see someone try to convince you otherwise..lol more proof not affecting everyone on new update.
[Asus  Eee Pad Transformer Prime] B-Mod:
My battery graph is perfectly smooth, no ripples or dips, sleeping like a baby. Only weird thing is it says it has been off charge for 16 hours, I know it was closer to 19 hours since I took it off the charger, but I did not wake it up at all? Maybe the battery was full, so it took a while to sence it was off charge? Interesting.......

Wife has a 32gb, mine is a 64gb, both are in power save mode, hers is sleeping well also........
[Asus  Eee Pad Transformer Prime] lakatua:
I also was affected with unusual battery drain when i applied the most recent update (.13). I factory reset and then manually re-applied the update. I did this with the prime fully charged... which i think made a difference. When i initially applied the update i was only at 20% charge...

With the factory reset and reinstall of the update i am getting reasonable battery usage: with intermittent use for the past 9 hours (with wifi on all day) i`m at 82%...
[Asus  Eee Pad Transformer Prime] rand4ll:
You have battery drain no matter what... Lol. However, mine has been off charger for over 48 hours now and I have over 60% battery life remaining. Granted I have barely had time to use it in past two days, maybe 2 hours or so.
[Asus  Eee Pad Transformer Prime] blinky44:
Why don't you just wipe it and don't install any apps. Then take a look, of course I am assuming no root too. Yes you could kill all the apps but there has to be someone that does not care if they start over. Otherwise it could be anything.
[Asus  Eee Pad Transformer Prime] Electrofreak:
I had no issues with battery life or the sleep of death until the .13 update. Now I have both. At least my WiFi and Bluetooth still work fine but this kinda sucks.

Thinking about rolling back, but I'll see how much longer I can stand this; hopefully ASUS will release a fix.
[Asus  Eee Pad Transformer Prime] PolishPoet:
You apparently not comprehending what i said, I do not have the issue. I can leave mine shutdown for over 8 hrs and lose about 4%. There are others stating the same thing.

Proud owner of a Transformer Prime on Tapatalk.
[Asus  Eee Pad Transformer Prime] jupppo:
Sorry to interfere, but when I shutdown mine I loses less than 1% per full day. When I put it to sleep it loses max 2% in 8h.
[Asus  Eee Pad Transformer Prime] carbo20:
I did that. - factory reset and no apps installed at all , just sync emails.

My TP is loosing 6% per hour in standby mode!

i even disabled WIFI + GPS and still loosing 6% per hour.

no doubt i was affected by the .13 OTA (before that the device worked without any issue)
[Asus  Eee Pad Transformer Prime] blackinjun:
My battery life seems better than before, HOWEVER, I have not pluggedit into the dock since the update, could that be the common denominator
[Asus  Eee Pad Transformer Prime] nyijedi:
The Dock has nothing to do with it. Many of us are experiencing huge battery drain since.13 and don't use the dock.
[Asus  Eee Pad Transformer Prime] blackinjun:
well in my opinion must be apps, I have run into that numerous times with Android even when reinstalling the same apps after factory reset, fixing the problem I mean.
[Asus  Eee Pad Transformer Prime] bgm307:
Got my second Prime yesterday. Charged it and updated to ICS. It went directly to build 9.4.2.13. Installed a few apps. Put it to sleep last night at 62%. This morning nearly 6 hours later I'm at 61%. Seems like it must be existing apps getting messed up in the update.
[Asus  Eee Pad Transformer Prime] nyijedi:
Could be, but if an incremental update (i.e., an update that doesn't go from HC to ICS) causes certain apps to drain the battery at a ridiculous rate when they didn't previously, it sounds like the firmware update is more at fault than the apps. At least that's my opinion.
[Asus  Eee Pad Transformer Prime] buxtahuda:
Yes and no. Apps only portray a piece of the issue I think.

Even after factory reset and very few of my usual apps installed, with sync settings changed and everything set to run as low as possible, I'm getting less than half the battery life I was when I had all 200+ apps installed, sync and WiFi on 24/7, and the occasional actually using the tablet while on .11 update.

Largest cause in my mind is still the higher low-end frequencies combined with over-volting in their poor attempt to alleviate unacceptable hardware variation with software updates.

I agree with plenty, that say 100 MHZ on 1-2 cores vs 3-4 cores isn't that much power difference (especially with correct voltage). But there is going to be a significant increase in power consumption when you turn the 100 MHZ up to 500 MHZ and change it from occurring on just 1 core to all 4 constantly, and then they up the power even more to account for the fact that some are apparently not drawing enough to come out of sleep regardless of how high the processor is set to be at its lowest. This all of course my personal opinion, and also doesn't stand that strong considering some users are apparently unaffected, still draining something like .5% or less an hour.

All I know for sure is that I was getting an entire work week out of my Prime pre .13, and on a lighter configuration than before I'm lucky to get two days.
[Asus  Eee Pad Transformer Prime] nyijedi:
This is great news. Thank you for the update.
[Asus  Eee Pad Transformer Prime] seeknom:
Hi Gary,

This is excellent news!

I know this is a long shot, but any chance you might be able to shed some light on the differing behaviour from user-to-user?

Some people were having serious battery issues while others seemed totally unaffected. It has us all scratching our heads... any chance you can satisfy our curiosity a bit?

Thanks again.
[Asus  Eee Pad Transformer Prime] kristovaher:
Any details what caused this? We'd know what to look for in the future?
[Asus  Eee Pad Transformer Prime] nukemanmd:
Gary, any idea whether the update will address only the BT/WiFi issue, or whether it will deal with a number of complaints. Unfortunately, Asus has a bad habit of pushing out updates without providing any information about the issues addressed.

I'd like to avoid installing updates that deal with problems I haven't experienced.
[Asus  Eee Pad Transformer Prime] BUYMECAR:
Wow so I hadn't noticed a difference because I've been doing a lot of heavy gaming on the go but I turned off WiFi this morning at 100% and left it in sleep in my car while at work. 5 and half hours later now at lunch it was at 94% before turning WiFi back on. Task Manager only showed ADW and KeyBoxProvision running. In the past my battery would only drop 2-3% overnight with WiFi on and we're talking 10 hr periods of no use.

So less than half seems to be a generous observation.
[Asus  Eee Pad Transformer Prime] buxtahuda:
Well, I'm still looking into as much as my lazy ass will let me, but I'm getting decent life now.

3 factory resets, drained the battery twice for calibration, and I've started only turning WiFi on as needed. I'm now only burning about 2% through an 8 hour night on .13 where it was 11% to begin with.

*EDIT:

Yep, so long as WiFi/Sync are kept off for me then I'm only burning 1% every few hours in standby.

I'm considering hopping back to .11 or earlier and doing the same configuration. I bet I'd only burn 1% every 4 1/2 - 5 hours..
[Asus  Eee Pad Transformer Prime] ruddogg:
I know Gary has said that an update is coming, but I wanted to chime in, I'm getting the sleep of death and reboot too. See screenshot below, notice how in the middle, there's a BIG gap in the graph? that's where the reboot happened I believe, my tab's been on for more than 5 hrs also. I think something IS draining the battery, then the tab is rebooting.
[Asus  Eee Pad Transformer Prime] mmilestone:
That is a big gap, indeed. Your TP must have taken minutes to reboot. Also, there's this big power drop after rebooting. Something must have used up a lot power during the boot-up process.

Did this start right after the update or days after? What steps have you taken since the update was done? Have you done a factory reset or installed/re-installed apps?

Try installing CPUSpy or Better Battery Stats to observe and analyze what could be the culprit - if it is indeed the update, or some rogue app.

_
[Asus  Eee Pad Transformer Prime] ruddogg:
It started after the .13 update...before the update I was able to go about 2-3 days without charging. I have not done anything different after the update.
[Asus  Eee Pad Transformer Prime] buxtahuda:
Have you looked at your stats through CPU Spy and such as mmile suggested?

Tried resetting? I know no one likes to factory reset, especially if you've got a lot of customized apps and internal files, but you can root and back up your apps and copy files to an external place. However, if you do this, don't restore from your backups just yet; just log in to your Google account but don't allow apps to download and see if the problem is there while stock. If not, download your apps or do another reset and let them be downloaded automatically to see if the problem appears. If it still doesn't, you could try restoring your apps from the backup or just call it good and go on.

If the problem appears after the first or second reset though, I'd say it's definitely either a hardware issue (probably with the GPU) or an issue with Google's/ASUS's code for ICS.

Did anyone experience these reboots on HC?
[Asus  Eee Pad Transformer Prime] kidio007:
After the update my prime's battery drains 4% an hour when in sleep mode. Turned wifi off and closed all apps, even did a factory reset, still the same. Hope next update will fix it.! :)
[Asus  Eee Pad Transformer Prime] ruddogg:
yup running CPU Spy right now, says 84% of time in deep sleep, 14% in 475MHz, doesn't show any app use...

no I haven't done Factory Reset, will wait a lil and see, maybe after that OTA that's suppose to come next week.
[Asus  Eee Pad Transformer Prime] buxtahuda:
My guess is this OTA is already clashing with an older one, will be interesting to see what a device that hasn't been reset does after this point. Not all my issues with .13 were solved with a reset, but battery drain combined with proper settings and practices got me almost where I was.

As of now, I'm going through all the official updates one-by-one and documenting the GPS/Battery capabilities of each. Of course I'm doing several resets through it all, but I'll link to the results once I'm done.
[Asus  Eee Pad Transformer Prime] BUYMECAR:
Very strange behavior to document... I got home and turned on my Prime and before turning on WiFi I checked the battery percentage. I saw it instantly drop from 78% to 72. Is this normal taking it out of sleep mode?

Either the Prime just takes a really long time to recalculate the estimate percentage or there is some weirdness going on here.
[Asus  Eee Pad Transformer Prime] ruddogg:
BTW... I'm using SetCPU to overclock to 1.6GHz, and underclock to 475MHz, using Ondemand governor, I'm wondering if the deep sleep is caused by the underclock, so I bumped up the minimum to 620MHz, I'll see if that makes a difference.

---------- Post added at 04:20 PM ---------- Previous post was at 03:28 PM ----------

looks like I got another reboot...
[Asus  Eee Pad Transformer Prime] buxtahuda:
Tsk. I don't know if SetCPU could be the issue, but I know it caused me some woes when I tried it on my Prime.

Try uninstalling or disabling it for a while and see what happens. Be sure to disable profiles and uncheck Set on Boot if you're just disabling.
[Asus  Eee Pad Transformer Prime] ruddogg:
ok, uninstalled SetCPU, will update to see if it makes any difference... FWIW, when I went to uninstall SetCPU, it had rebooted again.
[Asus  Eee Pad Transformer Prime] rand4ll:
So I wasn't able to use my tablet for a couple days and decided to run a small experiment and leave it alone for four days. The whole time wifi was on and it even came out of sleep to auto update market apps and made some notification noises on emails and whatnot. I experienced phenomenal battery life, zero reboots and am now even more amazed with this device than I have been so far. Here are the proof pics.
[Asus  Eee Pad Transformer Prime] dorianteal:
Chrome culprit?

Chrome was not playing nice with my Droid x (encounter ics) rebooting me and sucking battery. I have had poorer life on my Prime since the update, or maybe when I installed Chrome. I have uninstalled it and will document the results.
[Asus  Eee Pad Transformer Prime] buxtahuda:
:eek:

Say wha'!?

And this is on .13?

That's better than what I used to get. Do you have a lot of apps?
[Asus  Eee Pad Transformer Prime] mazjohn:
Since .13 update, I have been losing about 20 percent per hour with power saving turned on and wifi on but minimal use- reading pdfs mainly at lowest brightness draining 20 percent per hour. Something does not seem right here- Its definitely getting worse and worse. 5 thru 6 hours tops on a full charge. I tried the powermax APP to see if it would help, but i see no difference- do these power saving apps just make things worse?

When I first got the prime, I got 10-11 hours between charges on Honeycomb... Hopefully Asus can do something to make this better. WTF?
[Asus  Eee Pad Transformer Prime] demandarin:
Set CPU is not the culprit UNLESS you did something to tinker around in there without really knowing what you doing. Set CPU is not needed to overclock. Actually if you don't have ATP tweaks or vipercontrol mod installed, you are fooling yourself thinkn setcpu is actually overclocking..lmfao. CPU spy can confirm. If 1.6ghz is enabled, you're overclocked. If its not, you're dreaming..lol
[Asus  Eee Pad Transformer Prime] rand4ll:
Yes it's the 13 version, if you notice you do not see the prompt for update in notification area. And yes I have around 120 apps so far.
[Asus  Eee Pad Transformer Prime] RMXO:
Has anyone tried using betterbatterystats to check what wakelock is eating your battery life? sorry didnt read the whole thread. im on .13 and i don't have battery issues as some of you do.
[Asus  Eee Pad Transformer Prime] zektor:
Received my Prime on Monday immediately updated to .13, and popped it on an overnight initial charge around 12PM and took it off charge (it was at 100%) at 8AM yesterday. Left it in sleep mode with wifi on and went to work. Came home last night at 9PM and I was at 95%. Played with it for about two hours (extensively testing all ports, features, etc) and put it back to sleep at 89%. Left on sleep with wifi on from 11PM last night until 9PM tonight. Played with it for the last 50 minutes (playing Riptide and some emulators and some other graphically intensive games) and I am now at 60%. Just put her back to sleep with wifi on.

Battery life seems pretty solid to me!
[Asus  Eee Pad Transformer Prime] jacobrv:
Since the update my battery life has been terrible. I'm pretty light on my usage, so I was getting about a week on a full charge of the tablet+dock combo. After the update I've been having to charge every day. I thought I must have installed some app preventing sleep, but I've eliminated all new apps.

What I have found is that with the dock attached, the tablet won't go into "deep sleep" and instead stays at 475mhz all the time. I took the tablet off the dock, put it to sleep, and turned it back on 2 minutes later and it had about 1m45s of deep sleep. Put it on the dock again, tried the same thing and no deep sleep.

Right now it has 26 hours of data. It spent about 10 hours charging, about 3 hours of screen on time, and the entire time it was on the dock. No deep sleep whatsoever.

I heard this was a problem before, but by the time I got my dock it had been fixed. Now it's broken again. I guess the simple solution would be to keep them detached except when in use, but that's a big PITA.
[Asus  Eee Pad Transformer Prime] Undead46:
My battery life has been just outright awful since the latest .13 update.

I take my Prime(w/ Dock) off charger at around 9:15am in the morning and it remains in sleep mode until around 1-2pm when I use it at the office for moderate/slight usage (and it will already be down to 60% dock battery before use) such as listening to some Pandora Radio. By the time I get home, if I don't put it back on the charger, it will be fully dead by the next morning.

This is ridiculous and I really hope they patch a fix soon! :/
[Asus  Eee Pad Transformer Prime] buxtahuda:
I'm curious, considering the dock connection is the same we use for USB. What are your settings under development? Specifically, do you have "Stay awake while charging" checked? How about "Force GPU rendering?"

I've just thought about it recently, but something could be going haywire there and I wonder how many people experiencing this issue have that option checked...
[Asus  Eee Pad Transformer Prime] kidio007:
It seems like my prime didn't get much sleep last night:

I had it on power saving mode, turned off wifi and killed all apps, then I closed the lid. It's supposed to go to sleep mode then right? Or do I have to do something else to make it sleep? Lost about 35% battery during the night.
[Asus  Eee Pad Transformer Prime] buxtahuda:
When was the last time you've rebooted?

I can't say what exactly causes this, but after I had "updated" from .13 to .7 to .11, before I powered my Prime off and on again, its CPU Spy was showing all my time at 102 MHZ instead of Deep Sleep.

That's the biggest issue with .13 IMO, if something goes wrong and your tablet just sits at your lowest clock, then .13 is going to kill battery compared to the older ones.
[Asus  Eee Pad Transformer Prime] kidio007:
I rebooted yesterday, and after I rebooted again now it went to sleep mode when I closed the lid. I rebooted again, and now it wouldn't go to sleep. Seems to go wrong a lot, and on balanced mode it stays way too often at 1200mhz when I use it during the day. Did factory reset a few days ago too. But I will just turn it off at night for now until Asus fixes it hopefully.

Would be much better if it just stayed at 102mhz at night when it goes wrong, yeah. Instead of losing 35% battery, maybe I would only lose like 10% then.
[Asus  Eee Pad Transformer Prime] buxtahuda:
Hmmm. Yeah, something's not right with their governing or something.

And I know what you mean, spending too much time on the higher frequencies. I've noticed that they like to jump from minimum to maximum speed more than they like to scale-as-needed. I guess so people say "What great performance and speed!"

It's just making me say "I'm back on .11 and am still at 100% after 4 hours off the charger! Thank you Deep Sleep and 102 MHZ for like 98% of my Prime time."
[Asus  Eee Pad Transformer Prime] buxtahuda:
And BAM!

I love it when uneducated guesses work out! :D

This is on .11, same settings as my .13 and three times as many (all my) apps. WiFi off of course, I'll come back once it actually drops to 99% to show it's 1% drain time and will then turn WiFi on to see how that turns out.

*EDIT:

**EDITEDIT:

And here we are, something like 3 hours with WiFi on for 1% drain
[Asus  Eee Pad Transformer Prime] rand4ll:
Just an update, used my prime for a few hours last night and stopped with 20% or so charge at 11pm. Got home at 7pm tonight and it was at 17% battery life and had been on for over 5 full days. Still an version 13 of ICS and have no reason to go back but do look forward to more processor steps becoming available again. I finally broke down and plugged the tablet in to charge!
[Asus  Eee Pad Transformer Prime] Undead46:
Turns out the prime was at 60% while the dock was at 100%, so when I opened (woke) it, it had to charge the tablet. Then died over the night.

And neither of those options you mentioned were checked. But it sounds like .14 will be rolling out tomorrow so I'm hoping this will fix my issue.

I'm also getting dropped WiFi connection after a few hours of use. Especially after waking from sleep mode; tis quite annoying... :/
[Asus  Eee Pad Transformer Prime] demandarin:
Sounds great! Thanks. Can't wait to get the lower power states back.
[Asus  Eee Pad Transformer Prime] kristovaher:
While I would want WW sooner, after the last update I am glad that WW has a delay. I wish best of luck to our beta-testers from US and hope it won't make things even worse. Again.
[Asus  Eee Pad Transformer Prime] mmilestone:
Change log, Please?
[Asus  Eee Pad Transformer Prime] demandarin:
Its already here and I have it installed. It added our lower power states back and gave 1.4Ghz back. Posted screenshot proof in firmware update thread. Everything is working great so far. I have no complaints.
[Asus  Eee Pad Transformer Prime] mmilestone:
That was fast! :)

I sure hope there would be no need for resets if something is wrong with this one.

Checking now. I'll probably check. Go to bed and do the update in the morning.
[Asus  Eee Pad Transformer Prime] blackinjun:
Yeah, hopefully the update today solves things but i think i found the problem. After the last update my battery life was great until i used the dock. After unplugging from the dock at full charge i got battery drain from the prime alone overnight to 43%
[Asus  Eee Pad Transformer Prime] buxtahuda:
It gives lower power states...

But on how many cores? 100 MHZ on four cores is still going to be (only slightly mind you) worse than one.

Anyone know how I can check which cores are active at a given time? Or a testing app that tries to utilize one core at a time, then two, then all?
[Asus  Eee Pad Transformer Prime] chamberc:
It looks like .14 fixes all primes since all primes, without exception, had the battery drain problem with .13. Great news!