[UNOFFICIAL][ROM]BETA LineageOS 18.1 for SM-T710 - June 12, 2022

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lpedia

lpedia

Senior Member
Sep 18, 2020
257
137
Samsung Galaxy Tab S2
HTC 10
Hi, @pflyaz! Thanks for going to the trouble of spelling out the procedure for those who are new to experimenting with LOS or other custom ROMs on their Tab S2s. I'm sure a lot of people will find it very helpful. 👍

Fingerprint reader ... we had intractable issues with it that seem to be either due to the reader hardware or proprietary firmware (or both), so there wasn't anything @retiredtab could do to fix it. I no longer even try to test it. If it works and doesn't give trouble, you are fortunate!

[Edit: I typed the wrong gapps name! D'oh! MindTheGapps should work, but I haven't tried it lately.]
You might also be lucky that opengapps is working for you. I'm using MindTheGapps BiTGapps and haven't had any issues with it. The MindTheGapps BiTGapps zip has only the essential Google services and the Play Store app, and doesn't even include the Google Setup app, but you can add that and all other apps via various addons. If you use addons to install Google system apps (Calendar, Contacts, keyboard, launcher), they will remove and replace the equivalent LOS system apps.

Your list of Android settings is very like mine 🙂 except that I use Microsoft Launcher and Cx File Explorer, and always turn off all touch / key sounds because I find them irritating.

But I've found that restoring a TWRP Backup of just the Data partition recovers almost everything: system settings, Google account, apps, app settings, and app data. This saves me a fair bit of time after the regular clean flashes I tend to have to do for testing things. I go back to TWRP and do the restore after first boot of the system and letting gapps settle in (waiting until it brings the Play Store app up to the latest version, which can take a little while).

Note: I don't recommend trying to restore a TWRP backup that was taken on a different OS or version. The data structures are almost certain to have changed, and you're likely to end up with boot loops or strange system misbehaviours. So it won't help with a first install, but if you have to wipe and clean-flash the same OS and version for some reason, a TWRP Backup-Restore Data might get you back to where you were before the wipe. Or at least, that has been working for me (I tend to be wiping and clean-flashing my T710 fairly often, while testing things).
 
Last edited:
P

pflyaz

Member
Dec 1, 2021
12
8
Samsung Galaxy Tab S2
Samsung Galaxy Tab S7 / S7 Plus
lpedia said:
Hi, @pflyaz! Thanks for going to the trouble of spelling out the procedure for those who are new to experimenting with LOS or other custom ROMs on their Tab S2s. I'm sure a lot of people will find it very helpful. 👍

Fingerprint reader ... we had intractable issues with it that seem to be either due to the reader hardware or proprietary firmware (or both), so there wasn't anything @retiredtab could do to fix it. I no longer even try to test it. If it works and doesn't give trouble, you are fortunate!

You might also be lucky that opengapps is working for you. I'm using MindTheGapps and haven't had any issues with it. The MindTheGapps zip has only the essential Google services and the Play Store app, and doesn't even include the Google Setup app, but you can add that and all other apps via various addons. If you use addons to install Google system apps (Calendar, Contacts, keyboard, launcher), they will remove and replace the equivalent LOS system apps.

Your list of Android settings is very like mine 🙂 except that I use Microsoft Launcher and Cx File Explorer, and always turn off all touch / key sounds because I find them irritating.

But I've found that restoring a TWRP Backup of just the Data partition recovers almost everything: system settings, Google account, apps, app settings, and app data. This saves me a fair bit of time after the regular clean flashes I tend to have to do for testing things. I go back to TWRP and do the restore after first boot of the system and letting gapps settle in (waiting until it brings the Play Store app up to the latest version, which can take a little while).

Note: I don't recommend trying to restore a TWRP backup that was taken on a different OS or version. The data structures are almost certain to have changed, and you're likely to end up with boot loops or strange system misbehaviours. So it won't help with a first install, but if you have to wipe and clean-flash the same OS and version for some reason, a TWRP Backup-Restore Data might get you back to where you were before the wipe. Or at least, that has been working for me (I tend to be wiping and clean-flashing my T710 fairly often, while testing things).
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Thanks for the feedback and helpful advice.
 
R

retiredtab

Senior Member
Nov 16, 2017
1,114
678
New build called lineage-18.1-20220612-UNOFFICIAL-gts28wifi.zip

lpedia has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.

June 12, 2022 release notes

1. YOU MUST read posts 1-4 if you haven't already

2. Removed vibrator code from gts2-common as wifi only models don't have vibrator motor (only LTE models).
https://github.com/retiredtab/andro...mmit/e54aee73a98e3cef6e74f96c1815cec9c82ff10d
https://github.com/retiredtab/andro...mmit/dd846b06378182398c55b57b2edc2537369bd509

3. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-06

4. If you are upgrading from the April 10 build or later, you may dirty flash the June 11 build. If you are NOT coming from the April 10th 2022 or later build, you MUST BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA. You cannot dirty flash at all. See FAQ Q11.

5. @lpedia writes

A warning: if you have BiTGapps installed and the BiTGapps recovery script says when you dirty-flash the ROM that BG will have to be re-installed, don't ignore that. Re-flash BiTGapps before booting the system.

I say this from experience. My T710 went into an infinite bootanimation loop after I ignored that message and tried to reboot straight after dirty-flashing a ROM update. Once I forced it back into TWRP with "adb reboot recovery" and re-flashed BiTGapps, the reboot succeeded.
 
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    retiredtab
    Frequently Asked Questions. You MUST READ this before posting any questions. Thank you.

    QuestionAnswer
    Q1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.

    Kernel
    https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux

    Device Tree
    https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
    https://github.com/retiredtab/android_device_samsung_gts28wifi

    Vendor
    https://github.com/retiredtab/proprietary_vendor_samsung-selinux

    In addition, there is a repo diff file for device-specific tweaks needed to work and a roomservice.xml (local manifest file) file so you can build this rom yourself. The other patch required for tcp/ip is at https://github.com/DerpFest-11/pack...mmit/22fd53a977eeaf4e36be7bf6358ecf2c2737fa5e
    Q2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since mid August 2021 with no major issues.
    Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.
    Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.
    Q5. What TWRP should I use?A5. You MUST use my unofficial TWRP 3.5.2_9. Get it from

    https://sourceforge.net/projects/retiredtab/files/SM-T710/TWRP/
    Q6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.
    Q7. Will you offer monthly updates with security patches?A7. We plan to do so. lpedia will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What's working" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).
    Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum. Having said that, @pflyaz has kindly make a guide in post #37.
    Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.

    Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.

    To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:

    Bash: 
    # clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c then zip the problem.txt file
# before uploading it.
    Q10. How long will you build 18.1 for this device?A10. For now, 18.1 will be built for all of 2022. After that, we will make a decision depending on a number of factors.
    Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. Under most circumstances, yes.

    If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.

    If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.

    The ONLY exception is that if you are coming from LOS 18.1 with the April 5 2022 security patch or later, you can dirty flash the May 5 security patch build.
    Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps, OpenGapps, and MindTheGapps. OpenGapps is being removed as per post #11. Do your own research as to what is the most reliable gapps option for you.

    I recommend installing the SMALLEST version of any of these, preferably with just the minimum Google services needed to access the Play Store and run apps that depend on Google services.

    You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.

    If you are going to install any Gapps package, follow the installation instructions given for that particular package.
    Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.
    Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.
    Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
    • Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
    • Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
    • Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
    • Use a web browser with built-in adblock and privacy features, such as Brave.
    • Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
    • Look for apps that are open source, ad-free and lightweight.
    Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.
    Q17. Will this ROM ever become official?A17. Never. Official maintainers have onerous responsibilities, and I know my device trees, code organization and git commits will NOT meet LineageOS standards. I'm not able or willing to take on the responsibilities and commit the extra time to supporting an official build.
    Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.
    Q19. Will there be any major 18.1 code modifications in the future?A19. I don't anticipate any major modifications. There may be some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done. This doesn't mean the code is perfect or well organized, but I won't be making any major changes.
    Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.
    Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working. So I will NEVER build T715, T810 and T815.
    Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.

    ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.
    Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.
    Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.

    In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 800+ lines of code) have some errors.

    If the device is rooted, this would further weaken the security.

    With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.
    Q25. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the BETA rom?A25. Downloads are at

    https://sourceforge.net/projects/lpedia-sf/files/gts28wifi/
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    R
    retiredtab
    Initial public build called lineage-18.1-20220411-UNOFFICIAL-gts28wifi.zip. The sha256sum file is provided as well to ensure integrity of download.

    lpedia has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.

    April 11, 2022
    1. YOU MUST read posts 1-4 if you haven't already
    2. First public BETA release of selinux enforcing T710 build.
    3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
    4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ Q11.
    View
    3
    ananjaser1211
    ananjaser1211
    Congratulations on the awesome release!
    View
    2
    R
    retiredtab

    LineageOS 18.1 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T710 ONLY​

    Model: SM-T710 (wifi) - gts28wifi - 8" 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

    What doesn't work

    1. fingerprint. As I wrote in post 1891 at

    https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725

    I will not spend anymore time looking at fingerprint. 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. 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. @retiredtab, @ananjaser1211, @lpedia, @Yogi555 and @CuckooPenguin for spending nearing 1 month fixing the 2 most biggest bugs in 17.1 that plagued users for nearly 10 months: the wifi instability and random reboots. These are discussed in detail at

    https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308193/
    https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308203/

    3. All past contributors of the exynos5433 code.
    4. @rINanDO for his lmkd spam fix in 18.1.
    5. beta testers: lpedia, Yogi555 and CuckooPenguin
    6. lpedia for building the public T710 monthly roms starting April 2022
    7. lpedia for suggestions, proof reading and FAQ table format in post #2.
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    2
    R
    retiredtab
    Monthly release notes

    June 12, 2022
    1. Removed vibrator code from gts2-common as wifi only models don't have vibrator motor (only LTE models).
    https://github.com/retiredtab/andro...mmit/e54aee73a98e3cef6e74f96c1815cec9c82ff10d
    https://github.com/retiredtab/andro...mmit/dd846b06378182398c55b57b2edc2537369bd509
    2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-06

    May 12, 2022
    1. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
    2. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05

    April 11, 2022
    1. YOU MUST read posts 1-4 if you haven't already
    2. First public BETA release of selinux enforcing T710 build.
    3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
    4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ.
    View

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