[Galaxy Tab S2 Android Development] hurray:
So finally I made my way to Oreo on my TabS2 (T-810).

It was a nice way without greater problems. :)

I came from

lineage-14.1-20180427-UNOFFICIAL-gts210wifi.zip

(which is also made by [MENTION=6005084]ripee[/MENTION] in another thread I don't remember anymore).

First I made complete backups via rsync from all files on the internal and external sdcards.

Create backups from all user apps with "Titanium Backup" (so I was prepared for a complete loss of every data, just in case...).

Then I updated the recovery partition directly with "Flashify" (a relative old app but it works absolutly flawless till now) to "twrp-3.2.3-1-gts210wifi.img" (now I am on "twrp-3.3.0-0-gts210wifi.img" but the main uprade to Oreo was made with "TWRP 3.2.3-1".

I got the TWRPs from this thread: https://xdaforums.com/tab-s2/orig-development/recovery-twrp-3-2-1-0-t3719988

After flashing the TWRP I booted into TWRP and followed the manual part "FULL WIPE (with external microsd card)" on page 1 of this thread.

I flashed these zip-files in this order:

lineage-15.1-20190310-UNOFFICIAL-gts210wifi.zip
open_gapps-arm-8.1-pico-20190304.zip
Magisk-v18.1.zip

The next reboot lasts a little bit but everything works nice and I came back to a shiny new installation under Oreo. :)

Magisks updated itself after the boot to the current version 19.1.

Then I tuned the access for OBBs on the external sdcard with the following modules:

01. Under Magisk is needed:

- "ExSDCard Access Enabler"

- "Riru - Core" (from this thread on page 1: https://xdaforums.com/xposed/android-9-0-xposed-solutions-t3889513 )

- "Riru - Ed Xposed v.0.4.1.2 (YAHFA)" (from the same thread)

02. Installation of EdXposed Manager 4.3.2 (from https://github.com/ElderDrivers/EdXposedManager/releases )

In EdXposed Manager I installed these modules:

- "Obb On SD" with the activation of "Data On SD" and "Detect SD on An droid 5/6". The module is complaining that there is no detection of Xposed but it works correctly. :)

- "XInternalSD" with activation of "Custom path to internal SD card". (With this setting I am able to manage the redirection of data from single apps to the external sdcard. :) )

The next step was the installation of Titanium Backup and restoring of all my user apps (no system apps are restored!) => all went well

Now I have Oreo on my TabS2 and everything is working fast and nice!!

Deep sleep is working correctly and I have seen that access to both sdcards (internal and external) is much faster comparing to the old ROM.

I must reformat the external sdcard with extFAT to gain access again and it has a new name (under the old ROM it has the name "0000-0000" and under Oreo now "B355-0810").

The data was restored via rsync on my pc (so it was a good thing to backup at first ;) .

So I have now a capacity of a full "Samsung 256 EVO" under my TabS2 available for storing normal data like videos & books AND for storing OBBs & app-data. :)

- Camera is working good

- GPS is working good (fix within 30-60 seconds and an accuracy of about 16 meters. Good enough for a tablet)

- Microphone is working good

- The current Antutu Benchmark gives a score of 103563 (just a side information)

And this is all in combination with a current version of Magisk and Xposed (via EdXposed) so XprivacyLUA (for sending fake data to nosy apps) and VIPER4Android (for tuning the sound of the TabS2) are also running fine.

Not bad for a Tablet from 2015...

So [MENTION=6005084]ripee[/MENTION]: THANK YOU VERY MUCH FOR THE ROM AND MANTAINING LOS FOR OUR TABLET!!! :)

The only thing I am missing for now is the setting to turn off WiFi completely if the display is off. I used this setting for ages on the tablet as I don't need any wifi with the screen is off. But I can automate this feature with "Automagic" if I don't find the correct setting for this.

PS: A full backup via the TWRP twrp-3.2.3-1 and twrp-3.3.0-0 is working fine without any error messages. :)