yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S2 Original Android Development] thefanum:
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
[Galaxy Tab S2 Original Android Development] lmacmil:
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.
[Galaxy Tab S2 Original Android Development] lmacmil:
I had random reboots with 17.1 but them were unrelated to battery level. I rarely let my charge drop below 50%. Recently went back to 16.0. Haven't used it enough yet but battery is 38% as I type this and no problems.
[Galaxy Tab S2 Original Android Development] thefanum:
Nice! Well, if/when you get the random reboots, the fix I posted should work for you. It works on all three of mine.

But that's awesome. You might have the last functional SM-T713 on the planet, lol
[Galaxy Tab S2 Original Android Development] thefanum:
Here's the builds I'm using, I think the 16.x builds are even still getting security updates.

LineageOS Downloads

lineageos.wickenberg.nu
[Galaxy Tab S2 Original Android Development] lmacmil:
I flashed the 3/28 build. It has the January patch. That's current enough for me.
[Galaxy Tab S2 Original Android Development] lmacmil:
Going back to 16.0 has improved battery life significantly vs 17.1.
[Galaxy Tab S2 Original Android Development] lmacmil:
I see an update dated April 3rd. Anyone know if that has the March security patch? The March 28 update still had the January patch.
[Galaxy Tab S2 Original Android Development] thefanum:
I'll try to check this evening and report back
[Galaxy Tab S2 Original Android Development] thefanum:
Still Jan 5th 2022 security patch for the April 4th build.
[Galaxy Tab S2 Original Android Development] fmc000:
The Feb2022 patches were merged on Feb24, just the security string wasn't bumped. The Mar2022 patches were submitted on Mar25/26 but still not merged.

https://review.lineageos.org/q/branch:lineage-16.0
[Galaxy Tab S2 Original Android Development] thefanum:
Thanks for clearing that up
[Galaxy Tab S2 Original Android Development] lmacmil:
So the February patch is in the latest build but not identified in the build info?
[Galaxy Tab S2 Original Android Development] fmc000:
That's what it look like to me, of course I have no proof of this other than what's visible in the link I posted.
[Galaxy Tab S2 Original Android Development] thefanum:
That's definitely a thing. I've seen it happen several times with unofficial builds over the years.

Anyone know how we could manually check? Is there a file we could check the creation date of or something?
[Galaxy Tab S2 Original Android Development] lmacmil:
I have experienced WiFi suddenly turning off several times in the week since my 713 has been back on 16.0. It's always come right back on by itself until today. WiFi wouldn't stay on so I had to restart that tablet. I had forgotten about this little 16.0 quirk. On the plus side it haven't had any random reboots!
[Galaxy Tab S2 Original Android Development] thefanum:
Ok, so it's not just me! I was starting to think I was crazy, lol.

My internet is being fixed as we speak, I'll get back to troubleshooting when I know it's not my infrastructure that's the problem.

Anything interesting in the logs when the wifi cuts out?
[Galaxy Tab S2 Original Android Development] lmacmil:
Nothing in the router log. Don't know where to look in tablet if that's what you meant. I have experienced this with almost every version of LineageOS but I think maybe 17.1 was better than 16.0.
[Galaxy Tab S2 Original Android Development] thefanum:
Ok, good to know. If you have root (or don't mind using ADB to enable it) please check logcat on the tablet, this is the app I like. I'll be doing the same and report back.

Logcat Reader - Apps on Google Play

View your device's logs

play.google.com
[Galaxy Tab S2 Original Android Development] thefanum:
Ok, I finally managed to capture logs from when the WiFi cut out (on 17.1, still working on getting a logcat from 16), and there's lots of errors, but I'm not sure what the culprit is. I'm going to keep Googling errors from the log, but if anyone wants to take a look and see if they can spot the culprit, it would be greatly appreciated.

I've attached the log file.
[Galaxy Tab S2 Original Android Development] lmacmil:
I'm not rooted. Can you get to that file in TWRP?
[Galaxy Tab S2 Original Android Development] thefanum:
You can use adb

Logcat command-line tool | Android Studio | Android Developers

Logcat is a command-line tool that dumps a log of system messages, including stack traces, when the device throws an error and sends messages that you have written from your app with the Log class.

developer.android.com
[Galaxy Tab S2 Original Android Development] lmacmil:
Just installed the 4/10 update and it still shows the January security patch.
[Galaxy Tab S2 Original Android Development] lmacmil:
Android 9 is EOL so there will be no more security patches. January was the last one.
[Galaxy Tab S2 Original Android Development] fmc000:
Why people speaks just to give air to their lungs is beyond me. Current LOS 16 builds contain March 2022 security patches, just the string isn't updated.

Currently April 2022 security patches are under review.

https://review.lineageos.org/q/branch:lineage-16.0
[Galaxy Tab S2 Original Android Development] lmacmil:
Hey, I read it on Wikipedia and Wikipedia is never wrong! :) It does seem curious that since it was first released, 3+ years ago, the string has always been updated monthly Then suddenly, 3 months in a row (coincidentally after Android 9 became EOL), the security string is no longer updated. I'm not sure I buy this but I have no way to prove it.
[Galaxy Tab S2 Original Android Development] thefanum:
Does anyone have a suggestion for permanently disabling ipv6?

Still trying to troubleshoot the LOS 17 build wifi issues. Logs are indicating it might be ipv6 related
[Galaxy Tab S2 Original Android Development] Concept48:
This device is not supported anymore by LineageOS official , how ever , LineageOS microG still supports this device with Android9 and so does e.foundation , find the LosMicroG build here https://download.lineage.microg.org/gts28vewifi/?sort=time&order=asc
[Galaxy Tab S2 Original Android Development] thefanum:
AMAZING. You just made my day. Thank you!
[Galaxy Tab S2 Original Android Development] tr3rktr0n3000:
Anyone has trouble encrypting the tablet with this ROM? I already tried with two different devices and after hitting the Encrypt button the tablet goes back to homescreen and does nothing after that
[Galaxy Tab S2 Original Android Development] thefanum:
Yep, last I checked encryption was not functional on this build.
[Galaxy Tab S2 Original Android Development] tr3rktr0n3000:
Thanks for the reply, do you know if the same applies to the current lineageos 17 build?

At first I was under the impression it was a problem with twrp due to a few threads I found here and on reddit
[Galaxy Tab S2 Original Android Development] thefanum:
I do not know, but I do have a separate tablet on that version. I could test it for you if you would like. Will probably take a day or two to backup my stuff first, just in case
[Galaxy Tab S2 Original Android Development] tr3rktr0n3000:
I would definitely appreciate that, and sure whenever you get the time
[Galaxy Tab S2 Original Android Development] thefanum:
K, I'll report back
[Galaxy Tab S2 Original Android Development] thefanum:
No luck on the 17.1 builds either. Sorry.
[Galaxy Tab S2 Original Android Development] Deltadroid:
Nougat is the only one that supports hardware based encryption on galaxy s2, which is also faster than the software based encryption.
[Galaxy Tab S2 Original Android Development] tr3rktr0n3000:
Does that mean that software based encryption is possible while using this rom, and if so if there's a guide as to where to start?

Sorry, it's been a while since last time I was dealing with custom roms
[Galaxy Tab S2 Original Android Development] Deltadroid:
Software based encryption for Pie should be possible for this device or else it would not have had an official release by LineageOS. Unless something recently changed in the code that broke it... I can not confirm that.

Install LineageOS on gts28vewifi | LineageOS Wiki

wiki.lineageos.org
[Galaxy Tab S2 Original Android Development] qaplus:
Does anyone know how to reduce deep sleep battery drain in this rom? The rom works fairly well. But the deep sleep drain is about 1%/hr, comparing to 0.1%/hr from the stock android 7 rom.
[Galaxy Tab S2 Original Android Development] thefanum:
I actually have not noticed that on my LineageOS 16 or 17.1 sm-t713 tablets. But I might have just missed it, as I do charge them frequently.

Maybe try clean flash? Or flash newest stock and try again?

I'll also pay closer attention to the discharge rate on both of mine and report back. What version are you on, newest 16, I'm assuming?
[Galaxy Tab S2 Original Android Development] thefanum:
Thank you for this info. Do you have any idea what the performance hit would be like with software encryption? And/or how to enable it if I was willing to make that trade off?
[Galaxy Tab S2 Original Android Development] Concept48:
You must see it this way , you upgraded your engine , so it will use more enegery also because it's a Custom Rom and not the official thing , these are the compromises you make when going Custom and leaving the official ,..sometimes camera don't work or GPS , we don't bother bout those things really , if you do ..I hate to say it , stay on the official. We chose for a upgraded system that brings more security above options.. There is a good LineageOS14.1 development as well for this device , so it's up to you to find the rom that suites you the best. Good luck friend.
[Galaxy Tab S2 Original Android Development] thefanum:
Completely anecdotal, but I've found LineageOS to usually have better battery life than stock, and equivalent stand by battery discharge at worst. If course, your mileage may vary from build to build/model to model.

But I'm still not seeing the behavior that they're describing. So this is probably worth troubleshooting further.

Although, the answer is probably battery degradation. Which is a hardware issue that obviously the developers can't work around/fix.
[Galaxy Tab S2 Original Android Development] martytoo:
Two questions and if either is stupid I apologize in advance.

1) I tried to install the unofficial lineage 16 over an unofficial lineage 17. (I did this because the camera didn't work fo rme with lineage 17. I didn't find a thread for Unofficial Lineage 16.) I made a backup of the lineage 17 with TWRP before doing this as I knew it probably wouldn't work. I then tried to restore the lineage 17 backup and it failed. I did not root the OS. So my first question is why did the backup fail when I tried to restore it??

2) I am using Lineage 16 because the working camera allows me to install the Verizon Message app which allows texting on the Verizon network using my cell phone number. If I have a daily version of Lineage 16 installed and I attempt to install a subsequent daily over it without wiping and reinstalling the data is this likely to work? I haven't installed ROMs recently. The last daily use of a ROM that I worked on was for my S5 phone. I am out of practice and have forgotten quite a bit about installing these. But my memory was that it was very common for me to install daily releases one over the other when I was modifying my S5.
[Galaxy Tab S2 Original Android Development] TechX1991:
If anyone wants this, you can get it from archive.org

Wayback Machine
[Galaxy Tab S2 Original Android Development] Kaldun13:
The last official build is here
[Galaxy Tab S2 Original Android Development] thefanum:
You can't install ROMs over other versions. That's called a "dirty flash" and it's almost guaranteed to not work

If you're changing ROMs you have to factory reset, and format the data partition. Then you can flash the new one

This will destroy all data, files, apps on the device. So back up first
[Galaxy Tab S2 Original Android Development] martytoo:
Thanks.

Anyway, I tried to use Lineage on my S2 for a couple of weeks. I didn't like it. It was flakey and it was so long ago that I don't remember exactly how many issues there were. I went back to the official firmware and it's working fine.

Some apps (like Amazon shopping) won't work with that level of Android but at least tyke OS is rock solid.

I bought an 8.4 inch Verizon based cell capable tablet that was brand new for about $100. The only drawback is that it doesn't feel as premium as the S2 and there is no automatic brightness based on room brightness.

Thanks for your answer.
[Galaxy Tab S2 Original Android Development] HUN_Gyuszi:
Thanks for the effort but your link is for gts210, not gts28.
[Galaxy Tab S2 Original Android Development] LuK1337:
[9] is android version 9.
[Galaxy Tab S2 Original Android Development] tjupille:
I use Nova as well, and yes, the calendar widget(s) do work. The catch is that while some widgets work, many others do not. A+Calendar, RealCalc, and AquaMail are three examples of widgets that work on default SM-T713 Nougat, and work on my Galaxy S7 Oreo, but are MIA on this ROM. What I don't know (and don't know how to figure out!) is whether it's a problem specific to this ROM or simply that these apps are not (yet) compatible with Pie.
[Galaxy Tab S2 Original Android Development] nnortel37:
I use android 9.0 Pie on my 713 with Nova launcher. I test a few widgets like AquaMail, aCalendar, Calc, Notes.....

All works fine.
[Galaxy Tab S2 Original Android Development] heartog:
Anyone having issues with miracast? I've tested in on 20181018 and 20181203 builds and both of them would give me a black screen and a soft reboot when trying to cast.
[Galaxy Tab S2 Original Android Development] tjupille:
Thanks for the feedback!

I just did a clean flash of the 1203 build, and all the widgets are now working for me as well. Not sure if the new build or the clean flash is responsible, but I'm happy. :o For my purposes, this is now fully suitable as a "daily driver". I'm reloading all my apps and will give it a week or so to check battery life.

Remaining minor issues:

- The initial setup wizard is somewhat flaky. There was no "next" link after logging in to wifi, and it FCed a couple of times forcing me to restart.

- I really miss the stock Samsung keyboard with the actual arrow keys (I'm a ham-fingered typist).
[Galaxy Tab S2 Original Android Development] itchydroid:
Surprisingly solid build for beta. Been using for about 5 days with Magisk 17.3 and no gapps. 100% clean install and manual app restores and config. I'm getting slightly better battery life on standby with this at 0.7%/hr drain vs 1.0%/hr drain on LOS official 15.1. Wifi enabled and no apps running in both instances and monitoring battery stats with GSAM.

Im planning to make this my daily driver and was wondering if Privacy Guard will function in the future? I believe that PG is tied to SELinux being enforced and at this moment it is still permissive, possibly while the devs work out all the kinks. Just wondering whether this is true or not.

Thanks for the hard work. Really appreciated. Ill post regarding any bugs i run into to help out the devs.
[Galaxy Tab S2 Original Android Development] asdsam:
Phone calls impossible

I got quite a bug: neither me nor the other party can hear anything when I try to call with the SM-T719 phone application (or I'm being called). I can, however, record myself or call via a messenger without any problems (and even use a phone call recorder for my side). I can also send num pad presses and I hear a sound when the phone rings or one of us hangs up.

LineageOS version: 16.0 (latest update from 12/03)

LineageOS Download url:

Gapps version: Pico

Did you--

wipe: no (only phone app cache)

restore with titanium backup: yes

reboot after having the issue: yes

Are you using--

a task killer: no

a non-stock kernel: no

other modifications: yes, some restrictions on permissions, although I am almost certain that I tested all those in question and none did work (and I allowed all for the Phone app of course, did not change anything..)

Provide any additional information (observations/frequency of problem/last version it worked on/etc) as needed:

- happened since the first time I tried it

find the logcat output while I attempt to call here: pastebin.com/BNjHVKXa. I'd appreciate it very much if somebody could solve this problem.

Cheers
[Galaxy Tab S2 Original Android Development] Icmer:
I can't get the hardware Google Assistant shortcut to work. Setting any of the buttons to "Search assistant" does nothing when I try it. Yes, Google is installed as a system app (I read somewhere that this is necessary). I tried deleting the cache and storage for Google and even reinstalled Gapps.

Also, when I try to tap the "Updates" tab in the Google app (which is where Assistant should be) only an empty white bar pops up.
[Galaxy Tab S2 Original Android Development] vimjam:
Please read the instruction on first page. Dev cannot help you unless a logcat and additional details instructed in page 1 are provided.
[Galaxy Tab S2 Original Android Development] LibiSC:
Interactive governor keeps frequencies maxed out in the. Little. Cluster. Any of you have stock interactive config?
[Galaxy Tab S2 Original Android Development] johnnytraveler:
All is well here. Had to update twrp to get the install to work. Figured that out by reading through the comments. Then did a clean install with pico gapps.

Like others the initial install fced after entering wifi log-in. But eventually it took.

I only run a few widgets (weather & email) and everything works. No battery drain or wifi issues. So much much better than previous roms. Pretty good for a 3.5 year old tab.

Thanks op and others for the help.
[Galaxy Tab S2 Original Android Development] 511pf:
Anyone able to get standby usage under 0.6% per hour? Looks like this is possible on Lineage 15.1. Already turned off wifi with screen and stopped app syncing. Thanks!
[Galaxy Tab S2 Original Android Development] lmacmil:
I am running the 1/10/19 nightly of 15.1 and Accubattery says my standby usage was 0.3%/hr for the last 134 hours. I almost always turn off wifi when not in use and if I leave it on overnight, I close all apps as well. It typically loses 1-2% if on overnight (8-10 hours). I haven't figured out the benefit (for me) 16.0 yet so I guess I will stick with 15.1 for a while longer.
[Galaxy Tab S2 Original Android Development] 511pf:
Thanks, lmacmil! I went ahead and installed 15.1 based on your advice. I appreciate the feedback!
[Galaxy Tab S2 Original Android Development] Barondando:
This installed way easier than any of the current nightly 15.1 builds I've tried. This just WORKS. Fairly barebones, which is to be expected, but pretty stable!

As mentioned before, the backlights on the nav buttons don't work, but that's minor. I've had a few settings crashes when tweaking app settings and permissions (sends me back to my home screen) but they are rare.

Doesn't have any theming options yet, and I wish I could enable software nav buttons or nav gestures.

Definitely going to keep an eye on this build, but it's not ready for a daily-driver just yet!
[Galaxy Tab S2 Original Android Development] LuK1337:
Unless you installed literally the oldest 16.0 build button backlight should be just working.
[Galaxy Tab S2 Original Android Development] Barondando:
Oh my god I feel so stupid. I downloaded the build at the very top of the list on AndroidFileHost, I've been using the very first build this whole time *facepalm*

Downloading the latest now...

UPDATE: Yeah this is WAY better... Theming is present now, dark mode works, nav buttons light up!

Here's some Actually Relevant feedback:

- I'd love to be able to use gestures in place of the physical nav buttons, and it would be nice to be able to use on-screen nav-buttons too, since I can't swap the back button and app-switcher button. If these things are already present I've not yet been able to find them.

- In previous version of android, the settings button was visible on the quick-settings pulldown before it was pulled all the way down. Now I have to pull down twice in order to access it. Could the settings button be moved up to the initial pulldown?

- Probably an AOSP thing, but when changing the color mode in LiveDisplay, it would be nice to have a couple pictures to see how each mode looks (I think the Pixel devices have this, the Galaxy phones certainly do!)

Aside from these minor things, this build is great! If this is what 16.0 Official is like it's going to be excellent!
[Galaxy Tab S2 Original Android Development] tensux:
Loving this ROM. I have managed to get just about everything I want to work including substratum. The battery life actually is better than the stock rooted ROM I have been using for a year. One issue I haven't been able to resolve is with pornhubs app. For some reason I can not play any offline videos. I have a premium account which lets you download videos instead of streaming. Anyone have any ideas what might be causing it? I have about 5 different tablets with various roms including lineage but this is my first pie ROM.
[Galaxy Tab S2 Original Android Development] optionalmgrr.la:
So I need to turn off WiFi or tablet will drain by itself?
[Galaxy Tab S2 Original Android Development] ctludlow:
Same problem for me. WiFi keeps me from deep sleep. Great rom besides that.
[Galaxy Tab S2 Original Android Development] 511pf:
I turned off wifi and got deep sleep, but couldn't get idle usage below 0.6% to 0.7% per hour no matter what. That meant the tablet would die in a week even if I didn't use it. Same problem on 15.1. On stock, I get 3-4 weeks of standby battery. Had to go back to stock.
[Galaxy Tab S2 Original Android Development] hackintosh5:
I think to debug this I would need to test it myself....
[Galaxy Tab S2 Original Android Development] optionalmgrr.la:
Standby power consumption is a problem really
[Galaxy Tab S2 Original Android Development] lmacmil:
I have 0.2%/hour drain on 15.1 with WiFi off.
[Galaxy Tab S2 Original Android Development] ctludlow:
How is the drain on 15.1 with WiFi ON?
[Galaxy Tab S2 Original Android Development] lmacmil:
It was high enough that I started turning it off whenever I am not using the tablet. Don't remember the number.
[Galaxy Tab S2 Original Android Development] optionalmgrr.la:
What is the root cause actually? Can we get dome logcat to fix it?
[Galaxy Tab S2 Original Android Development] 511pf:
Tried for several full days to match this or identify the problem and just couldn't. I was using newer (early Feb) builds. No Facebook or messaging apps at all. Other apps had sync turned off. Tried using Battery Historian to troubleshoot, but it doesn't seem to be compatible with Lineage bug reports. Location off. Used CPU spy to look at CPU and it seemed fine. GSAM indicated that the tablet was deep sleeping. Set wifi policy off with ADB and separately used an app to toggle it off manually. Same apps on stock drain practically zero. Are you possibly on an older build?
[Galaxy Tab S2 Original Android Development] lmacmil:
I installed the 02/17/2019 build about a week ago. Prior to that I was on the 1/10/2019 build. I left the tablet on last night with wifi on but no apps open (location on). It drained 10% in 8 hours which is about 5 times the wifi-off number. I'll leave it on tonight with wifi off and see what kind of drain occurs with this build.