yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Tab A8 (2021)] kevinco1:
You need to download a build that is labeled 'bgN' if you want Google Play Services
[Samsung Galaxy Tab A8 (2021)] RamenZack:
I was on that build but still no luck. It would keep saying google play services keeps stopping
[Samsung Galaxy Tab A8 (2021)] RamenZack:
Nvm I didn't realize gapps needed magisk.
[Samsung Galaxy Tab A8 (2021)] kevinco1:
They don't...If you're having issues with play services clear data and cache
[Samsung Galaxy Tab A8 (2021)] yoboiicarguyyy2:
can someone help me i cant do anthing in fastboot
[Samsung Galaxy Tab A8 (2021)] lewmur:
What do you get when you type "fastboot devices"?
[Samsung Galaxy Tab A8 (2021)] b4r1s:
Same problem, I can only boot the device in bootloader mode, it couldn't get into fastboot mode. and fastboot devices code always returns empty response.

While I can connect with adb.exe, I have never been able to connect with fastboot.exe. please tell me where i went wrong :)
[Samsung Galaxy Tab A8 (2021)] lewmur:
Have you installed TWRP? Samsung's recovery doesn't include fastboot. You need TWRP. Also, on the PC you need the latest USB drivers from Samsung. Earlier version don't include fastboot driver.
[Samsung Galaxy Tab A8 (2021)] b4r1s:
Yes, of course I did all the prerequisites. Bootlosder lock passive, twrp installed. But only bootmode is active. I couldn't get Fastboot access even via Twrp
[Samsung Galaxy Tab A8 (2021)] lewmur:
I don't know what you mean by "bootmode". If you can boot to TWRP, there should be an option under "Reboot" to reboot to fastboot. If you can't boot to TWRP it is probably because you allowed the tablet to auto-reboot after flashing TWRP. If you do that, it will reboot to system and overwrite what you just flashed with standard recovery.
[Samsung Galaxy Tab A8 (2021)] mrstuffandthings:
FULL TWRP BACKUP of SM-X200 on Lineageos 19.1

THANKS ALL YOUS GUYS'!!

While simple enough to put me at fault to not have really keep track, but after a lengthy ordeal i am now happy to be back on my phh 19.1 LOS after many failed attempts to get to 20, but i had such a terrible time getting back to functional again its only GP to just put this here

for if anyone also cant get out of a boot loop and just wants it to work, has root, boots fine but is quite sluggish, might have a ram fix tho idk

6.4 GB folder on MEGA

16 files

mega.nz

here is a way to try some gsi's safe and sound

Release v2.03 · VegaBobo/DSU-Sideloader

DSU Sideloader 2.03 (8) This version improves app stability and fixes some bugs. Always enforce "settings_dynamic_system" flag when possible. May fix installation stuck for some devices. Write ...

github.com

oh and i got it to work after stock flash then twrp fastboot using the wipe and erase functions, and i also rebooted to fastboot from fastboot and then rebooted into recovery to format and wipe the data cache and metadata , i think all at ext4 but may not matter idk actually much of what i did was likely redundant or irrelevant , but after a long boot hang and reboot twrp an another wipe, i was all good

this si the version end up working for me, would have saved myself so much anxiety if i had just properly done the reading , oh well

lineage-19.1-20220814-UNOFFICIAL-arm64_bgS.img
[Samsung Galaxy Tab A8 (2021)] kevinco1:
https://xdaforums.com/t/flash-test-gsis-without-wiping-system.4580329/

_____________________________________________

How were you able to backup and restore within TWRP for this device?
[Samsung Galaxy Tab A8 (2021)] kevinco1:
Has anybody confirmed the TWRP backup part of this post to be true? I don't see how it's possible
[Samsung Galaxy Tab A8 (2021)] mrstuffandthings:
to be fair i never actually restored it yet but i just followed the guides and after a working boot i rebooted back into twrp and made a backup which obv ment i had to format the data (and metadata and cache but i dunno if these matter) and then i just w/ mtp copied the backup , but what your asking i think is how TF would one even get the size files back into twrp since in my experience anything of much size just wont , neither with adb push or mtp . the size is due to the super system image so , idk i can try and restore my backup if it would help , or you mean bc twrp wont really mount properly or so i hear and so i might be way off to say a full backup, its just what i got

twrp : twrp_3.7.0_12-2_X200XXS1CWA3.tar.md5
[Samsung Galaxy Tab A8 (2021)] lewmur:
If you can't backup the data partition, you might as well just flash the system.img again. Amounts to the same thing. You still lose everything and have to start fresh with setup.
[Samsung Galaxy Tab A8 (2021)] EliaAmir:
I'm thinking of flashing this GSI rom to my old SM-T585 Device.

Any ideas if this would work?
[Samsung Galaxy Tab A8 (2021)] kevinco1:
You'd have to go to your device's own forum to confirm that
[Samsung Galaxy Tab A8 (2021)] digitalcoder:
Legend - this worked for me :)
[Samsung Galaxy Tab A8 (2021)] MrFluffyOven:
Tested and Fully works on a UK Purchased GTA8WIFI, LOS20 is kicking off and rebooting, LOS19 is the most stable
[Samsung Galaxy Tab A8 (2021)] swankypantsu:
Anyone else having driver issues when in the fastboot mode on TWRP?

Stock rom w/ unlocked BL.

Using Samsung 1.7.59.0 USB drivers.

Windows shows unrecognized device for SM-X200. ADB works but cant seem to get windows to recognize tab from twrp fastboot.

Wondering if i need to deactivate driver signature enforcement or use any specific driver?

Edit: I found my issue, I had to click "update drivers" -> Have Disk -> show all devices -> Google Inc. -> Android Bootloader Driver.
[Samsung Galaxy Tab A8 (2021)] Kreuger:
Anyone find this to be super slow at charging? My tablet died for the first time and it has taken around 3 hrs to fully charge. Not sure if its related to LOS or not but Im running LOS19.
[Samsung Galaxy Tab A8 (2021)] exebat:
where i can find kernel source files for this?
[Samsung Galaxy Tab A8 (2021)] TimStoop:
After following the steps, my device boots and then in the Samsung logo screen it'll reboot back into TWRP. I've tried several images, both the 20 and 19.1, but the behaviour stays the same. Any suggestions on what to check next?
[Samsung Galaxy Tab A8 (2021)] MrFluffyOven:
Flash my latest twrp, find my post, before booting, go to advanced, terminal and type multidisabler
[Samsung Galaxy Tab A8 (2021)] saturnox64:
how can I install the gsi

I install it but the tablet memory is empty
[Samsung Galaxy Tab A8 (2021)] lewmur:
First of all, most of the people, and all of the devs, have moved on to Android 13 or 14. So getting help for Android 12 will be difficult. I'd suggest you read the threads for installing LOS 20 and try it. And if you have problems with it, people will need FAR more info than you've given in this post. Don't have any idea what you mean by "the tablet memory is empty".
[Samsung Galaxy Tab A8 (2021)] saturnox64:
I download the LineageOS 19 rom and install it with twrp

but the tablet starts to restart

and I look at it with twrp, there is nothing in the tablet's memory

just a twrp file
[Samsung Galaxy Tab A8 (2021)] lewmur:
That's because you have to format the data partition in order to flash the LOS ROM. But you should then be able to use the Reboot option in TWRP to boot to System. LOS will create the additional folders in Internal Storage during the boot process. If it won't boot, then you have to start all over by using Odin to flash the latest stock ROM. But I still suggest that you flash LOS 20 instead of 19.1. There were a few problems with 19 and the finding the cures would be a PITA!!
[Samsung Galaxy Tab A8 (2021)] skribb:
Can someone help me please? :3

1. I flashed LOS20 with fastboot flash and ran into a bootloop.

2. Restored stock AP with Óðinn and it boots now, but LOS20 isn't installed.

so, How do I properly fastboot flash the LOS20 -> Flash the stock recovery, in order to retain LOS20? thanks!
[Samsung Galaxy Tab A8 (2021)] saturnox64:
It won't be because the tablet is from Spain.
[Samsung Galaxy Tab A8 (2021)] lewmur:
It won't what? And what does Spain have to do with it? Your post are much too brief and lacking in the info needed to analzye your problem.
[Samsung Galaxy Tab A8 (2021)] am just a guys:
question can you get the normal apps not from Google? example: Clock Contacts and phone can you get the lineage ones?
[Samsung Galaxy Tab A8 (2021)] b4r1s:
los have tons of problem and stability issue.

maybe u can use superiorOS , its really perfect and smothh
[Samsung Galaxy Tab A8 (2021)] HawkVision:
anyone know where my error is ? I try to flash from PC to TWRP. in fastboot.

lineage 19.1 .img renamed it to system. BGN version. It is a Tab A8 running on TWRP 3.7.1_12 stable A14.

Do I need to flash magisk before Rom ? Its too long since I flashed devices. Ages ago .
[Samsung Galaxy Tab A8 (2021)] NarcoticvV:
I had this same problem with the 3.7.0 TWRP from this forum, but could flash with the TWRP from here: https://github.com/MrFluffyOven/android_device_samsung_gta8wifi/releases/tag/twrp

Unfortunately all LineageOS installs I've attempted result in boot loops so far.

EDIT: don't know why, but on the Nth time got it to work (see https://xdaforums.com/t/twrp-with-w...kan-drivers-test-builds.4655637/post-89561512)
[Samsung Galaxy Tab A8 (2021)] HawkVision:
Yes I couldnt flash it either
[Samsung Galaxy Tab A8 (2021)] nisfta:
I tried installing via DSU loader. Mobile connectivity works and overall experience was smooth. I am not sure, but it may be different when installing from recovery.
[Samsung Galaxy Tab A8 (2021)] nisfta:
Why? It's working for me
[Samsung Galaxy Tab A8 (2021)] lewmur:
Thanks for this. Got it up and working and it looks good. Just one little nit to pick. Can you add the USB driver link and note to install it before attempting fastboot? I know it's covered in later post, but it would be helpful if were covered here.
[Samsung Galaxy Tab A8 (2021)] lewmur:
I've run into a problem with 64gb SD cards. I've tried 3 different cards that all work in another tablet. TWRP reads and writes to the cards but LOS 19.1 has problems with them. I get notice to re-insert the card and to format it but neither works. 32gb card working fine. Haven't tried anything larger.

edit: Do I need to flash a different kernel to get exFat support?

re-edit: I solved the problem by formatting the 64gb SD card as EXT4. That allowed me to backup the SUPER partition and LOS 19.1 can read/write to it.
[Samsung Galaxy Tab A8 (2021)] DOBS:
I end up in a boot loop.. with the message "Kernel crash" and system dump..

This was what i did to solve it

1) Root the original firmware (Android 12) and check that I have root access

2) Flash TWRP using ODIN in "download mode"

3) reboot to TWRP and format the Data partition -

I got an error here saying data "failed to mount"

Solution: change format to ext3 and then back to ext4 within TWRP (see Youtube for details)

4) Wipe all partitions from TWRP

5) Reboot to fastboot from TWRP

6) Do "fastboot flash system lineage-19.1-20220814-UNOFFICIAL-arm64_bgS.img"

7) After all 11 sections are done "fastboot -w"

8 ) reboot...
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
you can remove Lineage OS without using fastboot

It doesn't work for me and I have the tablet without rom
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
use .zip for twrp
[Samsung Galaxy Tab A8 (2021)] DOBS:
AFAIK: You cannot simply zip an image file and use it for TWRP. Thats why fastboot is used here.
[Samsung Galaxy Tab A8 (2021)] lewmur:
Why would you need to zip it? You can flash img files via TWRP.
[Samsung Galaxy Tab A8 (2021)] nisfta:
Has anyone managed to install LineageOS 20 (https://xdaforums.com/t/gsi-13-lineageos-20-light.4509315/)? After installation I ended up with lineage logo loading and the recovery was reset to stock.
[Samsung Galaxy Tab A8 (2021)] kevinco1:
Did you notice a speed increase after formatting it from exfat to ext4?
[Samsung Galaxy Tab A8 (2021)] lewmur:
No, but I don't really use a tablet for anything that would cause me to notice it. I'm a firm believer in the right tool for the right job. I have three desktop computers for things that require CPU power. I only use my phone for phone calls, and I have a highend 2 in 1 laptop in the "carry bag" along with two Android tablets. I have been known to sit at the bar in my local pub watching the Saints game one of the pubs large screen TV's, with NFL Red zone playing on one tablet, the Nascar race on the other tablet, and reading a book on my laptop. That's my version of multi-tasking. LOL One device for each task rather than multiple tasks on one device.
[Samsung Galaxy Tab A8 (2021)] laharl_22:
When il launch the fastboot command-w i have a hal error on Windows and my tab bootloop its the same with format data on twrp i have a kernel panic what can i do ?sorry i forgot to use the New fastboot on Windows .now it work but if i want flash a New gsi does i need to reflash the stock Samsung before ?
[Samsung Galaxy Tab A8 (2021)] haison98:
Any Telegram chat to update this topic, I'm lazy to check the news on website :v.
[Samsung Galaxy Tab A8 (2021)] jeffbar2:
so far I have tried 19 and 20. I cant seem to get a ps5 controller to work with COD mobile lol. Currently using lineage-20.0-20221111 with a ps4 controller. this was my main reason for buying the tablet which has led me to this rom. Other than controller issue and no video, trebuchet seems very stripped down and needs dock customization options or a way to disable/replace with nova launcher. Just wondering if you know anything about ps5 controller button mapping not working with certain roms and any info or personal thoughts on launcher customizations and/or replacement. Thanks for your hard work I look forward to trying new builds and providing feedback.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
the pc does not recognize fastboot

I get nothing to install the rom

some driver is missing
[Samsung Galaxy Tab A8 (2021)] jameswalker457:
Hi guys looking for some assistance keep getting bootloop kernel_dump. I've tried everything.

Erasing all paritions reformating data to ext 3 then 4.

Magisk stock before flash.

None worked anyone advise?
[Samsung Galaxy Tab A8 (2021)] jameswalker457:
New newest ADB and fastboot version. I've got minimal and doesn't work for anyone struggling.
[Samsung Galaxy Tab A8 (2021)] MongolianMortuary:
Does this have display vibrancy control?
[Samsung Galaxy Tab A8 (2021)] Stryxus:
It would be incredibly beneficial if you put all the build assets on Github or, even made a guide on how to do it here on XDA. Personally iv spent hours upon hours learning the Android build system and how infuriating Samsung's systems are.

Never know, one of us may take up the task of maintaining LineageOS official support if we can figure out how it works.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
the rom is wrong

before starting it gives error

and stays in a samsung loop

make a video how to do it

I use fastboot
[Samsung Galaxy Tab A8 (2021)] Stryxus:
I dont think your reply posted properly.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
when it is flashed it comes out invalid at startup

that's not normal

and Lineage no longer comes out, it just stays in a sansung loop
[Samsung Galaxy Tab A8 (2021)] Stryxus:
I have no idea what you are trying to say.
[Samsung Galaxy Tab A8 (2021)] lewmur:
The ROM is NOT wrong. Many people, including me, have it installed and working. YOU are the one who is doing something wrong and no one is going to take the time to make a video just for you. If you want help, you are going to have to explain, in detail, just what steps you have taken and post screen shots of the errors you received.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
1

Format data from TWRP.

2

And wipe all partitions, then just reboot into fastboot and flash your system image

3

fastboot flash system system.img

4

lineage

5

fastboot -w

6

restart

7

and it already stays in the samsung image

something is missing me
[Samsung Galaxy Tab A8 (2021)] lewmur:
step 3 extract the .img from lineage .gz and rename it system.img

step 4 fastboot -w

step 5 fastboot flash system system.img

step 6 restart

by running fastboot -w AFTER flashing the system img, you wiped what you just flashed. and that step isn't really needed because you already wiped in TWRP.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
thank you
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
I get this

Invalid sparse file format at header magic

and the memory of the tablet is empty there is nothing
[Samsung Galaxy Tab A8 (2021)] lewmur:
From what I've read, that message is normal and you should just let it continue flashing.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
it is not saved on the tablet when flashing that is the problem

What I can do
[Samsung Galaxy Tab A8 (2021)] lewmur:
You say the tablet is empty. Does that mean that in TWRP you show 0 internal storage? If so, that means the data partition hasn't been formatted but only wipe. Wiped isn't the same as formatted. When you select wipe in TWRP, there is a button at the bottom of the page that says format data. Choose that and answer yes. The reboot to recovery and internal storage should no longer be 0.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
twrp

1

Format data

2

advanced wipe
[Samsung Galaxy Tab A8 (2021)] lewmur:
I don't know what you mean by that. How much internal storage is showing in TWRP? If you it is not zero, then you just need a standard wipe before proceeding to fastboot.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
When I put

fastboot flash system system.img

the tablet is formatted
[Samsung Galaxy Tab A8 (2021)] lewmur:
Why can't you just answer my question? Obviously something is wrong or you wouldn't be having a problem. How much internal storage does it show in TWRP?????????

edit: To find the internal storage amount, click /Backup/Select Storage
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
nothing that doesn't work

better leave it
[Samsung Galaxy Tab A8 (2021)] lewmur:
Well it works for everyone else. And if you can't answer simple questions, then maybe you're right. Leave it.
[Samsung Galaxy Tab A8 (2021)] ARIES4RR:
Does anyone know if it works?

the kali linux nethunter

on the tab a8
[Samsung Galaxy Tab A8 (2021)] Playfust:
Hello, can someone help me pls ? I followed all the steps correclty but after that the system did not start, the tablet just shut down and boot on trwp when i power it on.

edit : i reinstalled the original firmware because i need the tablet as my car headunit, the goal as installing lineage OS was to be able to do a 5ghz mobile hotspot (because it wont work on the original firmware), does it worth try reinstalling lineage or not ?
[Samsung Galaxy Tab A8 (2021)] lewmur:
I really don't understand what you are trying to do. If your tablet is really a SM-200, then it doesn't have an LTE modem and the only thing an X200's hotspot will do is repeat the wifi it receives. If you are in your car, where is it getting a wifi signal and why would you want to repeat it? If you actually have an X205, then you need to find the thread for installing Lineage on that model. And I don't think you'll find that Lineage does anything more with the hotspot than the stock ROM does.
[Samsung Galaxy Tab A8 (2021)] Playfust:
Yes its an SMX200, i just want to use the hotspot to create a local network between my phone and my tablet for android auto, this way it can be automated and automatically launch the service when my phone is connecting to my tablet hotspot, but in 2.4ghz the performance are very bad and i cant put the hostpot in 5ghz because the samsung firmware does not allow me to do it
[Samsung Galaxy Tab A8 (2021)] lewmur:
That's backwards. It is the phone that has the cellular data connection and it should be furnishing the hotspot, not the tablet. The tablet should then connect its wifi the the phone's hotspot. If the phone's hotspot has a limit on the number of connections, you could then use the tablets hotspot for additional connections. But I don't see that 5ghz wifi (NOT to be confused with 5G cellular on the phone) would be any better than 2.4ghz in the small confines of a car.
[Samsung Galaxy Tab A8 (2021)] Playfust:
Thats not the way that this setup works, the tablet itself is just a screen that receive Android Auto cast from the phone via the app Headunit Realoaded on the tablet, its like a RemoteApp on a RDS Server but the phone is the Server and the tablet is the client, the gateway is still the phone, but on a 2.4ghz hotspot this is lagging so much
[Samsung Galaxy Tab A8 (2021)] lewmur:
If the tablet is the client and the phone the server, it is still the phone that establishes the wifi channel. And I know for certain that the stock ROM wifi will accept 5ghz channels. The only case the tablet wouldn't would be if you had the wrong stock ROM for your regions. Different regions use different channels for 5ghz. But, again, there is NO SPEED difference between wifi 2.4ghz and 5ghz. I still think your are confusing that with 4G and 5G cellular data. The reason for using 5ghz on regular routers is congestion on 2.4ghz channels. But in an enclosed car, that shoudn't be a problem
[Samsung Galaxy Tab A8 (2021)] Playfust:
Yeah i know it confuse me too, but i can assure you that when i tried the other way (phone 5ghz hotspot with tablet connected to it) it worked very well, the problem is that this can only be automated (Android Auto automatically launch when i enter the car) in the case that the tablet is hosting the hotspot because i have an app on my phone that is made specifically for this setup (WiFi Launcher) that scan nearby wifi networks named specifically and automatically connects to it and launches Android Auto (yeah its complicated the first time but its not that hard for real)

To get back the tablet, with the stock Samsung firmware, i can only do 2.4GHz hotspots, it wont activate when i force 5Ghz, btw the option for hotspot does not even appear, i need to launch the hidden parameter for the hostpot via a third party app, with Lineage i will hoping to have no problem to launch a 5Ghz hotspot because the wifi card of this tablet can connect to 5ghz networks so normally she can also emmits a 5Ghz network and Lineage being an very open OS will have no reason to block me that option. (Im french and im tired sorry if my sentences are not very understandable)
[Samsung Galaxy Tab A8 (2021)] lewmur:
I still don't understand why 5ghz hotspot would work any better than 2.4ghz, but I don't think the Lineage 19.1 OS will help. I have it installed on my X200 and I just checked. Its wifi connects to my 5ghz router on channel 149, but when I enalble its hotspot, it broadcast on channel 6 2.4ghz. Sorry. Just my opinion but I think the problem is with the app you are using. I'd go to their website and explain the problem and see if they have a solution.
[Samsung Galaxy Tab A8 (2021)] Playfust:
OK, i will search again i hope i will find a solution, thanks for taking the time to respond
[Samsung Galaxy Tab A8 (2021)] ke4peo:
Hey all. Got Lineage 19 installed on my X200 and loving it. Really enjoying the fact I can now use my 256GB SD card as internal storage. :) But, I am having one issue. May be something simple that I'm overlooking....

When I go into the Updater and check for updates, it tells me there is and update available. However, when I click the "Download and install" button it tells me an error occurred during download.

Is there something I'm missing? Or another way to update the OS? (For notes: Bootloader is unlocked.)

Thanks!
[Samsung Galaxy Tab A8 (2021)] cyb7:
This happened also to me. (My) solution was after flashing system image in fastboot mode to remove the USB connection and then resetting the tablet by holding Power and Volume Down (right volume button). In that case LineageOS is booted.
[Samsung Galaxy Tab A8 (2021)] zaxiby:
Do the kernels in these roms support color controls using EX Kernel Manager?

The graphics icon is missing when EXKM is installed on my rooted A8 SM-X200 A12 LCD tablet.

This is not the OLED unit. I have used EX Kernel Manager on other devices where the option shows up.

A search reveals that Samsung has this disabled in this kernel.

The stock display settings offer only 4 useless preset color options.