[Galaxy Tab S2 Android Development] retiredtab:
LineageOS 19.1 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T810 ONLY​

Model: SM-T810 (wifi) - gts210wifi - 9.7" screen, Exynos 5433 SoC, no LTE

This is the ONLY model that the ROM will work on.

There is NO ROM for the T715 or T815 in this thread. Questions about T715 or T815 will be completely IGNORED.​

You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.

DISCLAIMER

I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.

All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.

Before attempting to install this ROM

1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.

2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.

3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.

What works

1. bluetooth

2. wifi

3. brightness

4. external audio

5. GPS

6. audio through headphone jack

7. audio over bluetooth

8. selinux enforcing

9. DRM level 3 (SD definition)

10. deep sleep

11. camera

12. Disk encryption (FDE). See post 123 for details as provided by xda user codiflow. Note: I don't use this feature and I won't be testing FDE when uploading the monthly builds.

https://xdaforums.com/t/unofficial-...810-sept-16-2023.4480033/page-7#post-89003457

What doesn't work

1. fingerprint is completely removed in 19.1. When I tested it in March 2022, it wasn't compatible with keystore2 and as I wrote in post 1891 at

https://xdaforums.com/t/rom-unoffic...t810-t815-t815y.3879302/page-95#post-85533725

it never worked properly after deep sleep. If you need fingerpint to work, stay with stock Samsung rom.

2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.

3. workaround to disable scoped storage. In 18.1 there was a workaround to disable scoped storage, but that no longer works in 19.1. So if you have a lot of apps or data on an external microsd, the performance may be severely degraded.

4. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems.

5. keyboard bug workaround. When prompted to enter something like a Bluetooth pin or text based password, sometimes the keyboard is not shown on the screen or off screen. The workaround is to goto settings, system, languages & input, on-screen keyboard, Android Keyboard (AOSP), appearance & layout, theme and choose "Material - follow system settings".

This keyboard bug is a LineageOS bug as per

https://review.lineageos.org/c/LineageOS/android_packages_inputmethods_LatinIME/+/325438

6. If you are repeatedly seeing “Connected to device. Can’t provide internet” (CPI), it's mandatory that you do a complete clean install including formatting data in TWRP and reinstalling all your apps. It's highly likely that CPI is because you did a dirty flash or one or more of your apps/configuration is messed up.

7. Possibly other features that I haven't tested or do not use.

Source Code

See FAQ 1 for links in post #2.

Thanks

1. LineageOS team for source code.

2. In alphabetical order.

@ananjaser1211

- helping out with libGLES_mali problem when I couldn't figure out why T810, for 3 months, wasn't booting with graphics

- answering more 5433 related questions wrt to certain features.

@bluess57

- joining the team and helping fix some of the legacy code problems

- pending code commits to come in the future

@bmwdroid

- testing many pre ALPHA builds and reporting the results

@CuckooPenguin

- testing many pre ALPHA builds and reporting the results, but sadly his T810 was killed by a cat (true story)

exynos5420 team

- making suggestions regarding radare2 debugger/code analyzer when I couldn't figure out why T810, for 3 months, wasn't booting with graphics

Kyle Harrison

- giving me a clue on how to fix the binder/keystore2 problem with msm8916 which ultimately led me to fix the same problem on the exynos5433 devices

- sharing his code on his github repos where I could study his commits to help bring up 19.1

- making code commits on LineageOS wrt to legacy devices like ours

- sharing the repopicks necessary to bringup 19.1

@lpedia

- testing many pre ALPHA T710 builds starting in April 2022 and reporting the results

- verifying my build instructions work so that the technically inclined can build this from source

- building, maintaining and most importantly, testing the T710 18.1 builds before monthly security patches release

@metterschling

- reaching out and joining our group to help with code and fix problems

- testing many pre ALPHA builds and reporting the results

- pending code commits to come in the future

@pflyaz

- testing many pre ALPHA builds and reporting the results

- writing install instructions for the newbies

@simon-edwards

- reaching out and joining our group to help with code and fix problems

- testing many pre ALPHA builds and reporting the results

@tarkzim

- helping me fix the gpsd crash problem because I was missing the libutils library in my Android.bp file

- sharing his code on his github repos where I could study his commits to help bring up 19.1 especially wrt to hal audio 2.0 and camera 1.0

@Yogi555

- testing many pre ALPHA builds and reporting the results

- building, maintaining and most importantly, testing the T810 18.1 builds before monthly security patches release

As you can see, it's truly a team worldwide effort in getting this ALPHA 19.1 build out.