05-08-2012 08:13 AM
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  1. Wookiee's Avatar
    Temporary fix - the drain will come back.

    Replacement batteries will NOT fix the problem. It's a problem with the wifi firmware or something else in /system.

    The wifi chipset is made by Broadcom and has a special feature called "Bluetooth Alternate MAC and PHY" (BT-AMP) - it apparently allows tunneling of Bluetooth over WiFi. In I777 UCKK6 and also recent Infuse Gingerbread leaks (UCKJ2 and later at a minimum), this feature randomly goes bonkers and starts waking up the phone once a second. This kills battery.

    For more details:
    Horrible battery life after 2.3.6 - Page 4 - xda-developers

    And general info on drain hunting (including how to confirm the problem with a Wireshark capture if oyu are rooted):
    [REF] Known identified battery drainers - xda-developers

    Also, please stop referring to it as 2.3.6 and by its proper Samsung build number, UCKK6. This allows the exact build to be identified, especially since this problem has nothing to do with Android 2.3.6 in general.

    Right now the best fix is a revert to UCKH7. There is documentation over on XDA. I strongly recommend not going to galaxys2root.com - it's intended to be an advertising clickfarm and the guy that set it up hasn't touched an I777 in months.
    While the information is appreciated, generally speaking, this forum is much more layman than xda. Some, like you and I, might know how to "talk shop", it would likely confuse people to use "proper" terminology around these parts and we'd spend more time trying to explain what a build number is, how to find it, etc. than actually solving the problem. It's safe to assume that the vast majority (if not all) of people in this thread who are experiencing problems are using UCKK6.

    But, back on topic, yeah, rolling back is probably the best solution.
    12-31-2011 07:31 PM
  2. chaplain's Avatar
    While the information is appreciated, generally speaking, this forum is much more layman than xda. Some, like you and I, might know how to "talk shop", it would likely confuse people to use "proper" terminology around these parts and we'd spend more time trying to explain what a build number is, how to find it, etc. than actually solving the problem. It's safe to assume that the vast majority (if not all) of people in this thread who are experiencing problems are using UCKK6.
    Eh - that's how I learned about Android. Someone said something that I did not quite understand, I googled it, read a bit, and then understood. For my part, I am just glad Entropy joined AC, and is willing to post over here. He is on the cutting edge of development for the i-777, and I always pay attention to what he says. I think that the AC community is broad enough that, if a post is too technical for a user, someone will be available to translate or help to make the info more practical. And, we don't flame noobs over here as bad as they do on some forums, so I hope that users will feel free to say that they don't understand an answer. Just my 2 cents.
    BugDad25 likes this.
    01-02-2012 09:08 AM
  3. ttlphotography's Avatar
    cliff note version of my experience is i "rolled back" to 2.3.4(UCKH7 ) by having ATT replace my phone. the update sent my phone into a very dark and nasty place, operationally speaking. They were very hesistant to replace the phone, but finally did so after several software repair attempts and reflashing the update rom onto the original problem phone with no success. They replaced it under the manufacturers 1 year warranty.
    01-02-2012 10:16 AM
  4. Tarnlight's Avatar
    I am also having this battery drain problem- which I believe is wifi related.
    You should be aware that there is an interesting mindset at both AT&T, and Samsung customer support. When you call to report this- or any other- issue, they will say that they don't have any record in their data base of this problem. "How is this possible?" I ask them. "There are whole threads refering to people who have contacted you on this subject," I inform them. They claim no knowledge of this.
    Turns out, what is happening is that when you tell them about the problem, they say that they will note it to YOUR account. I suggest to them that if 1000 people are calling with an issue, and all they ever do is to note it to each individual's account, of course they will never have a data base which indicates a common problem which must be addressed. At that point they usually just say "Is there anything else I can help you with," or words to that effect.
    Oh well!
    01-02-2012 11:47 AM
  5. Wookiee's Avatar
    Eh - that's how I learned about Android. Someone said something that I did not quite understand, I googled it, read a bit, and then understood. For my part, I am just glad Entropy joined AC, and is willing to post over here. He is on the cutting edge of development for the i-777, and I always pay attention to what he says. I think that the AC community is broad enough that, if a post is too technical for a user, someone will be available to translate or help to make the info more practical. And, we don't flame noobs over here as bad as they do on some forums, so I hope that users will feel free to say that they don't understand an answer. Just my 2 cents.
    I agree with you and I'm happy for all of it. All I was trying to say is, many of the people here are first-time Android uses (or even first-time smartphone users) who have no interest in learning proper technical jargon; they just want to get basic information. In my own ideal world, everybody would be as familiar with their technology as Entropy is, but since that is unfortunately not the reality, it should be expected that the vernacular will be less technical and somewhat imprecise.

    But again, back on track... please continue to tell Samsung about the battery drain issue using the bug report form: https://docs.google.com/spreadsheet/...lvZ2c6MQ#gid=0
    pounder001 likes this.
    01-02-2012 01:19 PM
  6. pounder001's Avatar
    I agree with you and I'm happy for all of it. All I was trying to say is, many of the people here are first-time Android uses (or even first-time smartphone users) who have no interest in learning proper technical jargon; they just want to get basic information. In my own ideal world, everybody would be as familiar with their technology as Entropy is, but since that is unfortunately not the reality, it should be expected that the vernacular will be less technical and somewhat imprecise.

    But again, back on track... please continue to tell Samsung about the battery drain issue using the bug report form: https://docs.google.com/spreadsheet/...lvZ2c6MQ#gid=0
    Thanks Wookiee, used the Samsung bug report form, hopefully if everyone who is having this issue does this we might see a fix.
    01-02-2012 09:23 PM
  7. Onanda's Avatar
    I am new to Android and smartphones. I was issued this phone by work and don't talk on it much, but constantly read and reply to email. Since I got it the battery has lasted 3-4 days (and seemingly getting better even).

    I got the AT&T software update to OS 2.3.6 message (if it even mentioned the build I don't remember). My battery was dead before 18-20 hours after each charge. I contacted AT&T and after removing the battery and them 're-registering' my phone it went to 24-30 hours now. (wow 50% improvement! but nowhere near what I was getting)

    AT&T rep could not find any issues relating to this (huh?) and did offer to send me a new battery. I then did searches and found this thread, hoping for a resolution. Per a recent post I also complained via the Samsung form.

    Although I very uncomfortable trying, I can't stand charging every day and am considering the advice to UnNamed if I don't get a fix soon.
    01-02-2012 10:31 PM
  8. Onanda's Avatar
    Here's what I just got from Samsung support -


    Thank you for your correspondence. We understand that you are having trouble with the battery life of your handset afteryou received the Over-the-Air update.

    We do apologize if you were not able to find your product on the drop down list. Our system is updating as of this writing due to new products and services that we have released. Rest assured that once update has been completed, information intended for your product will be readily available for assistance and support.

    Regarding this, there are no configurable options to downgrade the software of the handset once it the update has been installed.

    In regard with the battery life, we recommend fully drain the battery charge of your SGH-I777 handset until it could not provide any power for the device to turnit on, and then fully charge the battery again.

    Do you have more questions regarding your Samsung Mobile Phone? For 24 hour information and assistance, we offer our new FAQ/ARS System - Automated Response System at Samsung.

    It's like having your very own personal Samsung Technician at your fingertips.

    We appreciate your continued interest in Samsung products.

    Sincerely,
    Aaron
    Technical Support
    01-03-2012 01:34 AM
  9. maskedcarrot's Avatar
    I am new to Android and smartphones. I was issued this phone by work and don't talk on it much, but constantly read and reply to email. Since I got it the battery has lasted 3-4 days (and seemingly getting better even).

    I got the AT&T software update to OS 2.3.6 message (if it even mentioned the build I don't remember). My battery was dead before 18-20 hours after each charge. I contacted AT&T and after removing the battery and them 're-registering' my phone it went to 24-30 hours now. (wow 50% improvement! but nowhere near what I was getting)

    Placebo effect. It will get worse again. Pulling the battery is only a temp fix and doesn't fix anything.

    I reflashed 2.3.4 back on an my battery life is great again.

    Actually 2.3.4 always ran just fine and I saw no positive effects or changes at all with 2.3.6 outside of the battery issue. So I'm sticking with 2.3.4 for now. I see no reason at all to be using 2.3.6.

    Samsung should have released a changelog with 2.3.6. I never understand why AT&T Android phones never release changelogs with their updates. It seems when Verizon Androids have updates, you always see the changelogs plastered everywhere.

    For whatever faults Verizon might have, they are still a much better run company than AT&T. That's why I'm still thinking about getting a Droid Razr with Verizon. For some reason that phone keeps drawing me in.
    01-03-2012 08:29 AM
  10. ricktat's Avatar
    My battery pull ended up lasting for a week.

    So I pulled it again. Lets see if I get another week out of it.
    01-03-2012 08:55 AM
  11. birvini's Avatar
    How do I revert back to the older software version? My phone is not rooted. My phone is fine if I keep the WI-FI turned off but if I turn it on the battery is toast.
    01-03-2012 10:06 AM
  12. Entropy's Avatar
    In regard with the battery life, we recommend fully drain the battery charge of your SGH-I777 handset until it could not provide any power for the device to turnit on, and then fully charge the battery again.
    My GOD, I can't believe this - they don't even know how their own phone works! (This is horrible advice - it's useful on devices with a certain type of fuel gauge chip, no Samsung device I know of is in that category.)

    My battery pull ended up lasting for a week.

    So I pulled it again. Lets see if I get another week out of it.
    Shouldn't need to battery pull - just a plain old reboot.

    How do I revert back to the older software version? My phone is not rooted. My phone is fine if I keep the WI-FI turned off but if I turn it on the battery is toast.
    It's a bit difficult - you need to flash the old firmware using Odin or Heimdall.

    [Heimdall][Odin][Stock][Root]UCKH7/KK6 Return/Unbrick to Stock (or Root) - xda-developers - In addition to this, creepyncrawly has a great return-to-stock guide if you hop over to the I777 General forums from that link. However I think his Odin One-Click package may be broken and not flashing everything, so don't use that particular package.
    01-03-2012 10:25 AM
  13. maskedcarrot's Avatar
    How do I revert back to the older software version? My phone is not rooted. My phone is fine if I keep the WI-FI turned off but if I turn it on the battery is toast.
    There is a sticky thread in this forum on how to do it. It lists how to Unroot your phone, but all it basically does it flash the stock 2.3.4 back on your phone.

    Just go to http://forums.androidcentral.com/t-g...axy-s-2-a.html and follow the instructions. It's pretty easy.

    That's what I did to go back to 2.3.4.
    01-03-2012 10:38 AM
  14. wreckit72's Avatar
    I used Entropy512's Return/Unbrick to Stock, Kernel + Rooted System Package with Modem using Odin3 One-Click Downloader (Windows) method to return to stock and get rid of the battery issue. I cannot connect to my home wi-fi now. Does anyone now how to fix this problem?
    01-03-2012 04:24 PM
  15. birvini's Avatar
    I just emailed the office of the CEO for ATT with this whole battery/software update issue. I went this route on a different issue with them about six months ago and they were able to fix the issue immediately after about a dozen tries with various supervisors and departments. They actually called the local corporate ATT store near my house and had them set aside our two free Galaxy S2's for us last year. This was due to a huge screw up on their part relating to a Uverse installation bill for 600.00 that was supposed to be free. They were very accommodating then so I'll be curious to see what they do now. I requested that they cover any data overages on my account until the WI-FI bug that is causing our batteries to drain is fixed. I'll report back with their answer.
    pounder001 and Onanda like this.
    01-03-2012 04:26 PM
  16. Onanda's Avatar
    There is a sticky thread in this forum on how to do it. It lists how to Unroot your phone, but all it basically does it flash the stock 2.3.4 back on your phone.

    Just go to http://forums.androidcentral.com/t-g...axy-s-2-a.html and follow the instructions. It's pretty easy.

    That's what I did to go back to 2.3.4.
    Rooting and jailbreaking voids my AT&T warranty. Does anyone know if 'unrooting' back to 2.3.4 be detectable and mess up my warranty?

    I went into an AT&T store today and they wouldn't do anything because my battery usage is still within the 'norm' for a smartphone, even tho it's 1/2 of what it was.... gee thanks AT&T.
    01-03-2012 08:16 PM
  17. chaplain's Avatar
    I used Entropy512's Return/Unbrick to Stock, Kernel + Rooted System Package with Modem using Odin3 One-Click Downloader (Windows) method to return to stock and get rid of the battery issue. I cannot connect to my home wi-fi now. Does anyone now how to fix this problem?
    You will need to re-enter the password for your wi-fi system - you lost it during the flash. After going to settings/wi-fi/turn on wi-fi, you will need to long-press on the name of your network at the bottom of the screen, and a dialogue will pop up asking for the password.

    creepyncrawly has a great return-to-stock guide if you hop over to the I777 General forums from that link. However I think his Odin One-Click package may be broken and not flashing everything, so don't use that particular package.
    I used his one-click a couple of times in the past few weeks, and it worked fine.
    01-03-2012 08:54 PM
  18. maskedcarrot's Avatar
    Rooting and jailbreaking voids my AT&T warranty. Does anyone know if 'unrooting' back to 2.3.4 be detectable and mess up my warranty?

    I went into an AT&T store today and they wouldn't do anything because my battery usage is still within the 'norm' for a smartphone, even tho it's 1/2 of what it was.... gee thanks AT&T.
    By reflashing back to 2.3.4 you are not Rooting or anything, Being that it is an official firmware, I don't believe that it will show on the flash counter.

    I don't have the yellow triangle when I boot after reverting back to 2.3.4, so you should be fine.

    The flash in that link is the official 2.3.4, it's not a custom ROM.
    01-03-2012 09:00 PM
  19. chaplain's Avatar
    I am new to Android and smartphones. I was issued this phone by work and don't talk on it much, but constantly read and reply to email. Since I got it the battery has lasted 3-4 days (and seemingly getting better even).
    I got the AT&T software update to OS 2.3.6 message (if it even mentioned the build I don't remember). My battery was dead before 18-20 hours after each charge. I contacted AT&T and after removing the battery and them 're-registering' my phone it went to 24-30 hours now. (wow 50% improvement! but nowhere near what I was getting)
    Although I very uncomfortable trying, I can't stand charging every day and am considering the advice to UnNamed if I don't get a fix soon.
    Honestly, I think most folks on this forum would be very happy with 24-30 hours on a single charge. Why not just plug the phone in when you go to bed, and be done with it?
    01-03-2012 09:09 PM
  20. wreckit72's Avatar
    You will need to re-enter the password for your wi-fi system - you lost it during the flash. After going to settings/wi-fi/turn on wi-fi, you will need to long-press on the name of your network at the bottom of the screen, and a dialogue will pop up asking for the password.



    I used his one-click a couple of times in the past few weeks, and it worked fine.
    It would search for network but never find any network before closing. After installing Entropy512's latest daily kernel it still wouldn't find any wi-fi networks. I did a factory reset and now it is working. Thanks for trying to help.
    01-03-2012 11:38 PM
  21. maskedcarrot's Avatar
    It would search for network but never find any network before closing. After installing Entropy512's latest daily kernel it still wouldn't find any wi-fi networks. I did a factory reset and now it is working. Thanks for trying to help.
    I always do a factory reset after doing system updates. It is a lot of work reconfiguring the phone and reinstalling my apps. But I like to do it just to be fresh and have piece of mind knowing everything is totally reset.
    01-04-2012 08:13 AM
  22. Entropy's Avatar
    I used Entropy512's Return/Unbrick to Stock, Kernel + Rooted System Package with Modem using Odin3 One-Click Downloader (Windows) method to return to stock and get rid of the battery issue. I cannot connect to my home wi-fi now. Does anyone now how to fix this problem?
    Either you need to do a wipe/factory reset, or the kernel didn't properly flash.

    Rooting and jailbreaking voids my AT&T warranty. Does anyone know if 'unrooting' back to 2.3.4 be detectable and mess up my warranty?

    I went into an AT&T store today and they wouldn't do anything because my battery usage is still within the 'norm' for a smartphone, even tho it's 1/2 of what it was.... gee thanks AT&T.
    The return-to-stock package I linked earlier has an official Samsung kernel (won't trip the flash counter) and contains an unmodified system dump from a stock device - it's indistinguishable from a stock 2.3.4 phone that has been turned on.

    By reflashing back to 2.3.4 you are not Rooting or anything, Being that it is an official firmware, I don't believe that it will show on the flash counter.

    I don't have the yellow triangle when I boot after reverting back to 2.3.4, so you should be fine.

    The flash in that link is the official 2.3.4, it's not a custom ROM.
    Correct. All of my "return-to-stock" packages use a stock kernel that doesn't trigger the flash counter.

    The ones that root your phone do so by rooting the system image - which unlike the kernel isn't checked for customizations.
    wreckit72 likes this.
    01-04-2012 09:44 AM
  23. chaplain's Avatar
    All of my "return-to-stock" packages use a stock kernel that doesn't trigger the flash counter. The ones that root your phone do so by rooting the system image - which unlike the kernel isn't checked for customizations.
    Great to have you over here at AC, Entropy, w/some definitive answers. Very helpful.
    01-04-2012 10:38 AM
  24. birvini's Avatar
    I received my response from ATT's Executive Support Team earlier today. The lady was very nice and seemed to understand the issue. She said that Samsung is definitely aware of the issue and is working on a fix. She even said she researched the issue herself and found the responses on these forums useful.

    She said if we go over on our data plans due to not being able to use WI-FI without killing the battery they will adjust our bills accordingly.
    pounder001, burnout01 and j-bo like this.
    01-04-2012 12:15 PM
  25. burnout01's Avatar
    So if we haven't updated to 2.3.6, should we stay on .4?
    Is there anything important that .6 takes care of?
    01-04-2012 01:33 PM
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