[ROM][OFFICIAL][T713][9] LineageOS 16.0

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thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
So I've got 3 SM-T713 and both the most recent 16 unofficial, and 17.1 builds crash randomly when the device gets below 55% battery. Is anyone else experiencing this? Does anyone have a fix?
 

Pawel_

Senior Member
Apr 4, 2007
51
18
I have the same when the battery is under 15%. Then any power-consuming task resets the device.
Looking for a good tutorial on how to replace it.
 

Deltadroid

Recognized Contributor
Apr 19, 2013
3,827
9,999
So I've got 3 SM-T713 and both the most recent 16 unofficial, and 17.1 builds crash randomly when the device gets below 55% battery. Is anyone else experiencing this? Does anyone have a fix?
It could be related the Pie branch. Try cm-14.1 branch and see if it still happens.
 

fmc000

Senior Member
Jan 18, 2008
3,175
1,376
Quite strange, even the newest release (T719) still has the Jan2022 security patches even though the changelog mentions that the Feb2022 should have been applied.
 

thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
Probably caused by battery degredation, our devices are getting old. Fix by replacing battery or keeping connected to powerbank
I've considered that but I have 3 different tablets of this model, all reported as healthy battery by acubattery (not fool proof diagnostics, I know), but every single one of them has the same exact threshold for spontaneous reboots .

I've now tried LOS 14, 16 & 17, on 3 different tablets, and all of them start randomly rebooting below 55% battery (although not always at the same amount below it). What's the next step for trying to diagnose this, if it is a software/OS issue?
 

SvenHee

Senior Member
Sep 11, 2014
182
17
Ede
Also read this when you experience rebooting:
 

SvenHee

Senior Member
Sep 11, 2014
182
17
Ede
Do any of you have a link to the last official build? I missed developement stopping and would like to update to the last one.
 
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thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
Also read this when you experience rebooting:
Fantastic, this is exactly what I'm looking for. I'll test it out and report back.

Thank you!
 

thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
Ok, preliminarily, I've had some success already. I installed the app "SmartPack-Kernel Manager" as suggested. I'm first testing on my LineageOS 14.1 nightly (Android 7.1.2), SM-T713. I've applied these settings, and was able to get down to below 5% battery 2/3 times (starting at 15-17%) INCLUDING under heavy load:

Hamburger menu in the top left, select "CPU".

Big CPU: CPU Maximum Frequency: 1382 mhz

Little CPU: CPU Maximum Frequency: 1190 mhz

Toggle the "Apply at boot" toggle at the top of the screen.

Back to hamburger menu in the top left, then 'i/o scheduler":

Internal Storage/Scheduler: set to "noop"

External Storage/Scheduler: set to "noop"

Toggle the "Apply at boot" toggle at the top of the screen.

Reboot the tablet and please report back if it works for you, and also what threshold you had to adjust, if any.

I'll be testing my LineageOS 16 and 17.1 tablets next. I'll keep everyone posted.
 

thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
Well, I think you guys cracked the code. I've had success with this approach/settings on LineageOS 14.1, 16 AND 17.1!

All 3 of my SM-T713's now work.

I was even able to do some fairly demanding multitasking, while around 15% battery. Whereas I couldn't even single task without crashes before these fixes.

Now we just need a 18.1 port, and my fav tablet will be perfect!
 
Getting ready to sell my T713. Currently on 17.1 but the camera does not work. My guess is that potential buyers will want a working camera more than a later Android version. Does the built-in camera app work on 16.0? I don't use the camera myself so I don't remember from when I had LOS16 installed over a year ago but I do remember reading that it did.
 

thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
Getting ready to sell my T713. Currently on 17.1 but the camera does not work. My guess is that potential buyers will want a working camera more than a later Android version. Does the built-in camera app work on 16.0? I don't use the camera myself so I don't remember from when I had LOS16 installed over a year ago but I do remember reading that it did.
I had not previously tested the camera (as I don't use them on tablets), but I just did a test on both the newest LineageOS 17.1 and the Feb 14's build of LineageOS 16.0.

As you mentioned, it's completely non functional on 17.1, but it does work on 16.0. Both cameras tested, and took "acceptable" quality photos (significantly worse than a newer device, but within the range I would expect from a device of this age).

Hope that helps!
 
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thefanum

Senior Member
Dec 27, 2011
131
33
OnePlus 3T
OnePlus 7T
EDIT: I think the wifi issues might not have been the 17.1 ROM. I think it's ISP ****ery on my end. I'll report back once I figure it out. But for now, it's probably safe to use the LOS 17.1 builds again, if you don't care about the cameras.

Please report back if wifi works for you or not on LOS 17.1. My issues was the wifi went to sleep when the screen went off, between 1-5 minutes after the screen turned off. No matter what I set the power and battery optimization settings to.

---OLD POST---
Looks like the 17.1 build also has unreliable wifi. No matter what settings I've tried, wifi always goes to sleep a few minutes after the screen turns off. I'll probably just go back to 16, but let me know if anyone has any ideas about a wifi fix. I really liked 17.1, especially since I don't use the camera
 
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I had not previously tested the camera (as I don't use them on tablets), but I just did a test on both the newest LineageOS 17.1 and the Feb 14's build of LineageOS 16.0.

As you mentioned, it's completely non functional on 17.1, but it does work on 16.0. Both cameras tested, and took "acceptable" quality photos (significantly worse than a newer device, but within the range I would expect from a device of this age).

Hope that helps!
I flashed 16.0 and now have a working camera! Battery life seems better than 17.1 but haven't used it long enough to be sure. Where are the latest builds? I seem to have lost the link.
 

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    2okPze5.png


    LineageOS is a free, community built, aftermarket firmware distribution of Android 9 (Pie), which is designed to increase performance and reliability over stock Android for your device.

    LineageOS is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restore the Google parts. LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.

    All the source code for LineageOS is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit out Gerrit Code Review. You can also view the Changelog for a full list of changes & features.

    Instructions :
    • Download the latest build and gapps
    • Reboot to recovery
    • Flash the latest build and gapps
    • Reboot
    Downloads :
    Reporting Bugs
    • DO NOT Report bugs if you're running a custom kernel or you installed Xposed
    • Grab a logcat right after the problem has occurred. (Please include at least a few pages of the log, not just the last few lines, unless you know what you're doing.)
    • If it is a random reboot, grab /proc/last_kmsg. (Do not bother getting a logcat unless you can get it just before the reboot. A logcat after a reboot is useless)
    • If the problem disappears after running "setenforce 0" from a root shell, grab /data/misc/audit/audit.log
    Remember to provide as much info as possible. The more info you provide, the more likely that the bug will be solved. Please also do not report known issues. Any bug not reported in the bug report format below may be ignored.

    Code:
    What is your--
    LineageOS version:
    LineageOS Download url:
    Gapps version:
     
    Did you--
    wipe:
     restore with titanium backup:
    reboot after having the issue:
     
    Are you using--
    a task killer:
    a non-stock kernel:
    other modifications:
     
    Provide any additional information (observations/frequency of problem/last version it worked on/etc) as needed:

    XDA:DevDB Information
    [ROM][OFFICIAL][T713][9] LineageOS 16.0, ROM for the Samsung Galaxy Tab S2

    Contributors
    LuK1337
    Source Code: https://github.com/LineageOS

    ROM OS Version: Windows 8 Mobile

    Version Information
    Status: Testing

    Created 2018-08-16
    Last Updated 2019-03-02
    13
    I have updated the kernel in today's build with a new WiFi driver and several hundred cve. It should not be necessary to disable WiFi anymore while sleeping.
    6
    Ok, I also faced the challenge to update my bootloader in order to be able to update LineageOS to the latest versions and I am a Windows user and I did not want to do a clean install of first the Samsung ROM and then LineageOS, thereby losing my data. So I read a lot of posts here in the forum and used the following solution to update my Tab S2:
    - Download Odin from https://samsungodin.com/download/Odin3 v3.12.3.zip
    - Download the latest Samsung firmware from https://www.sammobile.com/samsung/galaxy-tab-s2/firmware/SM-T713/
    - Extract the .md5 file contained in the downloaded zip. You can use 7Zip for this. It can handle tar files as well, which is needed for the later steps.
    - Rename the file, so that it gets the extension .tar instead of .md5
    - Extract the files sbl1.mbn, aboot.mbn, rpm.mbn, tz.mbn, hyp.mbn, sec.dat, keymaster.mbn, cmnlib.mbn, adspso.bin, modem.bin and NON-HLOS.bin from the tar file and place them in any folder on your disk
    - Use 7Zip (or another program that can create tar files) to create a T713.tar file containing the files extracted in the last step
    - Turn off your Tab S2. Enter download mode by pressing Power+Volume Down+Home at the same time. Confirm that you want to update your system by pressing Volume Up.
    - Connect the Tab S2 to your PC with the USB cable. I'd suggest to not connect any other Android device at the same time now.
    - Run Odin as Administrator
    - Make sure the ID:COM field changes to blue, which indicates your device got detected
    - Click on the AP button and select the T713.tar file we created above
    - Click Start to flash the file. The Tab S2 should reboot at the end of the process.
    Afterwards you should be able to install the newer LineageOS versions (but no longer the older ones).

    Of course I take no responsibility if you brick your phone or nuke the world using the steps above ;).
    5
    Which date build has this fix built in? Official channel right? Thx millions

    The latest current available update includes new kernel.

    To verify, the new kernel is 3.10.108 in Settings->About.