yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S Android Development] masdaster:
No, there is no extra step. You can do it this way. But it is recommended to use the latest TWRP. Is your firmware up to date?
[Galaxy Tab S Android Development] masdaster:
Please check your firmware. Wipe again /data and /cache. Install crDroid one more time without Magisk or GApps and reboot.

If it is still in a boot loop after these steps, you are welcome to upload logcat. 😉
[Galaxy Tab S Android Development] WunderWungiel:
OK, I will try ;) I used build for chagallwifi, Magisk 23.0 and GApps pico Arm for Android 10.

What does 'logcat' mean? Log from TWRP?
[Galaxy Tab S Android Development] notasheepl:
I used twrp and both of the files had the same name without the numbers.

*last_kmsg removed*
[Galaxy Tab S Android Development] spton:
ok I tried flashing using The only TWRP version I can get to run 3.0.1 without locking at the TWRP logo and I got an error as it tries to flash this rom. I tried running every newer version of TWRP via Odin latest and they all lock at the TWRP logo except 3.0.1. Any ideas?. Also how do I check the firmware of tablet t-800 is up to date? so for now I have flashed back lineage14.1

thank you sir!
[Galaxy Tab S Android Development] pecigatt:
hello, i came to thank you for the work that gave new life to our Tab s, i'm running lineage 17 on the T705m and so far everything is very good...thanks very much...and any update is always welcome...
[Galaxy Tab S Android Development] masdaster:
Sorry. I've never heard of an easy way to check your current firmware version.

Just flash the latest firmware with ODIN. You can download it from here.
[Galaxy Tab S Android Development] spton:
edit: okay so I just updated the Samsung firmware with the last Samsung firmware and flashed everything according to your instructions with the only version of TWRP that I can get running without stalling on the TWRP logo which is TWRP version 3.0.1 and I got the error again during flashing your room. I've included a picture of the screen with the error.

the only version TWRP I can get to run is older 3.0.1 and that gives me an error when I try to flash your lineage17. other newer versions just lock on the TWRP logo. so unless I can figure that out which I think is the problem or to have an idea I'm just going to have to stick with the lineage 14.1. unless you think the error is a firmware issue and not an older twrp issue?
[Galaxy Tab S Android Development] masdaster:
Without having log files it's hard to guess, what's going wrong.

I've found this thread: https://xdaforums.com/t/twrp-stuck-on-splash-screen.3541037/

Did you wait for several minutes? Do you use f2fs?
[Galaxy Tab S Android Development] masdaster:
Just search the internet. There are many tutorials. 😉

Here you go: https://www.xda-developers.com/install-adb-windows-macos-linux/

Afterwards execute the following command and upload the file:

adb logcat -b all -v time > log.txt
[Galaxy Tab S Android Development] WunderWungiel:
I forgot 🙃

I have ADB and Fastboot already installed on my Arch Linux.

Do I have to do it while I am in TWRP? Or after successfull flash (when tablet is turned on)?
[Galaxy Tab S Android Development] masdaster:
We need the output during the boot loop.
[Galaxy Tab S Android Development] spton:
update I was finally able to get TWRP latest running t800 after many reboots trying to get latest TWRP working and Odin's and was able to load the this lineage 17. I flashed it successfully ( note you obviously must need latest TWRP to flash this ROM) and also flashed separately after rebooting nano gapps latest but unfortunately it was too much time hanging up and on the information of everything from Wi-Fi password to cycling on Google account info certainly not even nearly as fast and prompt as reloading lineage 14 every time I can get done in under 15 minutes and I'm back and running perfectly so for now I'll stick lineage 14 unless you have a suggestion. but thank you for the effort sir!
[Galaxy Tab S Android Development] masdaster:
What do you mean? Is the welcome screen with all the settings too 'feature rich'? Or do you talk about the performance? If it's all about performance then I've to agree. It's not that fast compared to LineageOS 14 if you don't use the modified kernel.
[Galaxy Tab S Android Development] notasheepl:
On the unmodified lineage 17 rom I have experienced some instability so far. Other than being somewhat laggy, sometimes it will do the reboot thing, but it is not as catastrophic as it is with masdaster's kernel. Sometimes background processes will crash, like VPNs for example. One thing I have noticed is that the reboots don't take as long as a normal user initiated reboot.

There is also a problem with extremely slow charging.

Might be going back to 14 soon.
[Galaxy Tab S Android Development] spton:
the initial setup for account , wifi etc hung up and was constantly triggering the asking to close popup for lagging system. I went through it 4 or 5 times bit finally gave up after it force rebooted a couple times before completion. sorry but for now linage 14 is fast and works.
[Galaxy Tab S Android Development] masdaster:
Regarding the reboots:

Do you see the device splash screen or the boot animation after it crashes?

I tried to track it down... This takes some time and I'm not that good in debugging low level code. I've read through huge parts of your log and maybe I found a clue. I'll try to disable some memory optimizations. Your crashes seem to be memory related (YouTube and system).
[Galaxy Tab S Android Development] notasheepl:
In the stock rom the splash screen(lineage logo animation) appears instantaneously. The logo will just pop up and the device will “half reboot”. With your kernel it froze then took a second to get to the animation. The samsung splash screen doesn't show up when it crashes, neither with the stock nor your kernel.

I guess I should have stated that in the earlier posts.
[Galaxy Tab S Android Development] ISoreo:
regarding from my forked, he's bring my config to T805 which i don't have that device, also i can't confirm it stable for that or not cuz i test it on T705 and T700 only. moreover, 17.1 stock we have issues that address to memory management and so on, which i already fixed that but few things will left is OOM from gpu that i didn't fix it.
[Galaxy Tab S Android Development] masdaster:
Thank you for your response!! 😃

Can you dig into it? Or can you give me some further information? It takes some time for me to deal with low level code. I'm used to C#, Java and some other. 😅

It's a little bit wired. I don't have any problems. My device is doing great. The performance is decent and there are no crashes at all. The system is stable and no app crashed so far. I'm using it on daily basis... 🤔
[Galaxy Tab S Android Development] ISoreo:
I have no clues what happening in the GPU, also i'm trying to patch that oom cause from GPU, idk can be from driver or my mistake that can't eliminate thats point. performance's overall quite great after i commit a lot patched to memory manager and so on. also app will crash depends on open a lot of graphical such as youtube and a web browser.
[Galaxy Tab S Android Development] HausiX10:
@8224Freak and all

Hi I tried to access my tablet via adb and got no reply. This is from Linux (tried with Win10 :sick: and got a configuration error). Booting TWRP gives me access. What could be wrong here?
[Galaxy Tab S Android Development] masdaster:
Yes... I expected a kernel panic but I didn't find a hard reset. 😆

What you encounter is a soft reset. Some important system processes die because of memory addressing failures. This is what we can see in the logs.

On Monday I should have enough time to build one boot image without the memory adjustments. Maybe I've also time to test my image with LineageOS. At the moment I'm using crDroid and all is fine. No crash, no freeze, running smooth...
[Galaxy Tab S Android Development] WunderWungiel:
I installed this ROM without GApps, and works like a charm! Great work!
[Galaxy Tab S Android Development] WunderWungiel:
I also successfully connected my keyboard for this tablet (official from Samsung), but Recent Apps button (F2) doesn't work. Home and Back works great on keyboard (Esc and F1). How to fix it?
[Galaxy Tab S Android Development] WunderWungiel:
And crDroid is better than Lineage
[Galaxy Tab S Android Development] notasheepl:
Is your kernel compatible with crdroid?

I avoided crdroid because I saw it was based on lineage and assumed it was heavier and bloated. I don't need android to do much fancy stuff other than run apps stably and smoothly. Although I wouldn't mind some customizability. But then again, I prefer a lightweight system over having options I never use.

Again, all of you have my many thanks for keeping our ageing yet perfectly capable devices in service well past their designated EOL.

Edit: Now that I think about it… crdroid is lineage, so yeah your kernel should work.
[Galaxy Tab S Android Development] steamrollerpark:
This works well,

1 Install Rom, install boot.img patched by Magisk

2 Boot up, install Trichrome, Busybox.

3 Install Google Play services, Play Store and Chrome.

No need to flash Gapps.
[Galaxy Tab S Android Development] notasheepl:
I have just been informed that the device, even in its full unrooted stock form, does in fact completely crash straight to the “Samsung Tab S” boot splash screen with visual “glitches” and artefacts preceding the reboot. So there is something more going on.

I got the last_kmsg files. They are bigger now and for some reason both of them had identical names in the proc folder.

*removed last_kmsg*
[Galaxy Tab S Android Development] masdaster:
Yes. You can use the image on LineageOS and crDroid.

I'm using crDroid and my modified boot image. I had no crash at all (no app crash and no system crash).

Regarding lightweight:

If you do not visit the extra settings menu, you don't see any difference between LineageOS and crDroid.
[Galaxy Tab S Android Development] notasheepl:
Is crdroid performing better/more stable than lineage? If so, I might be inclined to flashing it.
[Galaxy Tab S Android Development] glennza:
Hopefully someone can help with a custom kernel. This tablet gets too hot and throttles itself. By playing with the CPU frequencies this can be prevented and tablet will run quickly and smoothly.

I am a "hardware guy" otherwise I would try to do it myself!

Note: putting the extra thermal pads in is helpful too but just adjusting the kernel makes a big difference!

You can check your own device to see if it's throttling...

CPU Throttling Test - Apps on Google Play

App measures CPU performance over time to determine if there is throttling

play.google.com
[Galaxy Tab S Android Development] prodj77:
Thank you so much @8224Freak my Tab S Wi-Fi 10" is backing to life!!, there is some bugs (Wi-Fi 5 Hz it's not visible, only 2.4 Hz, the screen brightness its no so bright at max., I cant find the pixel protection for OLED display), but at least I have Android 10 in my tablet. Greetings from Mexico City 👍.
[Galaxy Tab S Android Development] Morrisme:
good job, worked for me.
[Galaxy Tab S Android Development] Danistics1:
Hi, I'm having the exact same behavior. stuck on the LOS splash screen.

Did you found a way to resolve this?
[Galaxy Tab S Android Development] clavead:
Try flashing pico or nano Gapp insteads, there is not enough system memory available to allow for installation of stock Gapps. You can always install the remaining Google apps normally from the Play store and they will work just fine.
[Galaxy Tab S Android Development] craigwfla:
Thank you for this and sharing your work! I have been waiting for an update for a while now and really appreciate it.
[Galaxy Tab S Android Development] Royal Guard 007:
Hi there

I have a klimtwifi and it random reboots for no reason, I've installed GApps pico.

EDIT: It was the SD Card, it had some problem scanning it (It was already in the tablet), I've inserted a new SD Card and it seems to work for now.
[Galaxy Tab S Android Development] $h@mw0w!:
I used the Aroma GUI installer, but was VERY selective with the apps I chose to install, i.e. I only picked the ones that I think are necessary (those that are part of Pico / Nano), and then those where the Gapps app replaces stock. Worked like a charm first time around.
[Galaxy Tab S Android Development] $h@mw0w!:
Chrome keeps crashing on me, even when I've only got a single tab open (e.g. it closed after I hit reply on my message above). Not running any other apps and only have bluetooth keyboard connected so that I can type. Anyone else having issues with apps closing / system crashing?
[Galaxy Tab S Android Development] Danistics1:
Thx.... pico worked ;-)
[Galaxy Tab S Android Development] theastroboy:
Does this work on a Canadian SM-T705W (klimtltecan)? It is currently on Lollipop and there is no newer stock ROM. It would be nice to keep the SIM capability. However, I would pick performance over SIM capability any day as I rarely use this tablet with a SIM card.

Anyone?

Thanks in advance.
[Galaxy Tab S Android Development] Amoosajjad:
I tried klimtlte .everything is OK .but my mobile network didn't work . actually Sim card detected but LTE or 3G or 2G for internet not working ...
[Galaxy Tab S Android Development] ymlik:
Hello,

I installed your Rom (T800) it works except:

-camera

- fingerprint reader

-torch

Is this normal, or does it work for you?

Thanks in advance
[Galaxy Tab S Android Development] welton:
Thank you so much for this! Installed using instructions provided and it works. It's like buying a new device :) .

As someone already highlighted the only issue I found so far is not being able to use 5 ghz wifi on chagallwifi, but I can live with that.

My process was: upgraded TWRP, wiped everything, installed rom and pico gapps.
[Galaxy Tab S Android Development] welton:
I also have chagallwifi and all you listed is working fine.
[Galaxy Tab S Android Development] ymlik:
ok, merci welton, par contre pour moi le wifi 5Ghz fonctionne sur mon chagallwifi.
[Galaxy Tab S Android Development] tvict:
Hi Frank,

Let me just say that i value this post as very wonderfull.

I was on the lineage OS android 7 from 2019 and never expected that would be another update again for the SM-T800 .

Installed your rom and everthing runs very smooth. Feels i am having a brand new tablet.

As for now i have no issues found. Even my 5ghz wifi is much faster then before.

I hope you will maintain this development and will follow this thread closly.

Again my thanks and regards!

Tjerk
[Galaxy Tab S Android Development] welton:
I got additional clues about why 5ghz wifi is not working. The device can only see see up to channel 112, so if you use channels 149—161 it won't see it. Not a deal breaker, but if anyone knows how to fix it, please let me know.
[Galaxy Tab S Android Development] MrMontana3333:
First i want to say tanQ for publishing this amazing Release...

Secound i installed Klimtlte. the only bug is Mobile Network. never turned on mobile netwok data
[Galaxy Tab S Android Development] tvict:
Ok, my initial reaction was a wauw. However i already ran into some problems. I had several browser chrashes. Chrome firefox, it does't matter wich one. Als a spontanious reboot.

But what is really anoying is the fact that the battery is charging slow. On google people talk about putting the fast charging option to off in android 10.

But that option isn't there in this costum rom.

Can anyone help me out here?

Thanks
[Galaxy Tab S Android Development] ymlik:
hello masdaster,

can your modified boot work on T800?
[Galaxy Tab S Android Development] friedsonjm:
Hi, 8224Freak ! Thank you so much for this ROM! Will you be doing any more security updates for it?
[Galaxy Tab S Android Development] masdaster:
I did no side by side comparison. First I flashed LineageOS and noticed a freeze after every reboot when unlocking the device the first time. The boot process took 42 seconds. Then the screen was frozen for a couple of seconds. Afterwards I flashed crDroid. It takes about 48-50 seconds to boot and there was no freeze. That's all I can say regarding performance. Stability is also very good. I had no crash up to now.

I compiled a new version (002) and reverted two memory modifications. Maybe this will help...

To all other users without reboots:

There is no need to 'update'. No new features were added.
[Galaxy Tab S Android Development] masdaster:
No. Unfortunately it is not compatible. If you are interested, I will try to build one. But I cannot test it. I've got only a T805.
[Galaxy Tab S Android Development] ymlik:
yes, i'm okay with you trying to build one for t800 if you have the time. would be cool.

merci d’avance.
[Galaxy Tab S Android Development] ISoreo:
it can bro just lunch lineage_chagallwifi-userdebug, thensync your defconfig to 805 and mka bootimage. btw outofmemory seems not happen to android 11
[Galaxy Tab S Android Development] masdaster:
Thank you! 😉

You've successfully installed android 11?
[Galaxy Tab S Android Development] ymlik:
sorry, but I don't know how to do that.
[Galaxy Tab S Android Development] masdaster:
I think, he was talking with me... 😆

I'll do it for you. Maybe Wednesday I've some free time.
[Galaxy Tab S Android Development] ISoreo:
Yep just build and test it on my T705
[Galaxy Tab S Android Development] ymlik:
ok sorry, i didn't understand, i'm french. anyway, thank you, and take your time.😀😀😀
[Galaxy Tab S Android Development] notasheepl:
Will test this ASAP.

And yes, I do experience the “freeze”. It is not really a freeze for me. I will put in the pattern and nothing will happen, then after like a minute I have to put in my pattern again. This sometimes happens when I switch user profiles too.

Will try crdroid too.

edit: It got hot af. with in like a few minutes after booting and youtube crashes after a bit.

edit2: it crashed full on with the samsung splash and all.

edit3: Tried crdroid with v1 kernal. Crash with samsung splash after a few minutes.

edit4: v2 is more broken than v1. bootlooped for a while then crashed after loading.

gonna test out crdroid for now.
[Galaxy Tab S Android Development] ISoreo:
enter to the recovery mode (TWRP) and copy file last_kmsg from /proc/last_kmsg and attach to here if i have a free time i will look it
[Galaxy Tab S Android Development] notasheepl:
The last_kmsg files are weird. There are 2 of them with identical names and sizes. I don't understand how both of them exist side by side in the same directory. Only including one of them this time.
[Galaxy Tab S Android Development] ISoreo:
ok use adb pull /proc/last_kmsg then copy it and upload here
[Galaxy Tab S Android Development] notasheepl:
sorry I thought I uploaded it and forgot I can't just upload it. here it is in tar form

*removed last_kmsg*
[Galaxy Tab S Android Development] ISoreo:
dont compress just pull that file and upload it

log looks weird, its throw dw_mmc dw_mmc.2: data CRC error

try to wipe system data and reflash the rom again
[Galaxy Tab S Android Development] notasheepl:
I checked the md5 and then wiped everything with the advance options, then flashed crdroid with pico gapps. Crashed both times with the custom kernels and now using the stock one.

I can't just upload the last_kmsg. It won't show up on the site after I post it. Also, I didn't compress it. It is just a tarball. Will reflash and see what happens. Might go to straight factory firmware, then do it all over again.
[Galaxy Tab S Android Development] ISoreo:
ok so if custom kernel didn't work try stock that coming with rom from 8224Freak i will look the log again
[Galaxy Tab S Android Development] notasheepl:
Yup. Currently, on crdroid stock and it seems to be stable. Web browsers crash (even the included one) but it is still very usable. Will need more time to see if it is better than lineage.
[Galaxy Tab S Android Development] ISoreo:
from what i faced cause from memory management, gpu, out of memory, low memory killer and so on need to patch it a lot. don't know masdaster do in memory patch i have no clue.
[Galaxy Tab S Android Development] Numansheikh:
Waiting for my t705 ... when you will release? How is it working?
[Galaxy Tab S Android Development] WunderWungiel:
How to fix slow charging issue?

Can I use Dealthy Adiutor on this ROM?

Can I fix slow charging with this solution:

https://xdaforums.com/t/rom-7-1-2-unofficial-lineageos-14-1-sm-t800.3545080/post-71611369

?

Please, reply. I really need faster charging
[Galaxy Tab S Android Development] ISoreo:
works fine cuz i'm build it for my personal use, still crash some high load but its acceptable for me
[Galaxy Tab S Android Development] aljoscha81:
i don't got first version of the kernel booting it freezes the locked screen so you can't use the tablet after i flashed a second time the screen gets black stripes freezes alsoi use the t805
[Galaxy Tab S Android Development] masdaster:
On first boot it immediately crashes? Do you use LineageOS?

@ISoreo

Do you have an idea, why I have no problem at all? I couldn't reproduce any of the mentioned crashes so far. :(
[Galaxy Tab S Android Development] ISoreo:
i have no idea since last_kmsg throws data CRC error and seems the kernel can't init itself correctly, it can't find a lot hardware driver to boot it properly, that's not good and should to rebuild the kernel again
[Galaxy Tab S Android Development] ISoreo:
let me see if i can bring it to my config
[Galaxy Tab S Android Development] aljoscha81:
jep but only test on lineageos so far
[Galaxy Tab S Android Development] masdaster:
Okay. Do you have an idea, why it's working on my device? If the image would be broken, I would have all the trouble too, wouldn't I?
[Galaxy Tab S Android Development] ISoreo:
i'm not quite sure that cause to your boot.img or else i have no clue make sure mka clean and mka bootimage again and let him test if still same, he might have something wrong i don't know. i have clueless
[Galaxy Tab S Android Development] masdaster:
As @ISoreo suggested, I'll do an entire rebuild of 'my' boot image without any cached files and a fresh environment next Monday or Tuesday. I hope this will fix the reboots...
[Galaxy Tab S Android Development] notasheepl:
Finally, I am no longer alone in this world. WE ARE BROTHERS ACROSS SPACE AND TIME!

Switch to crdroid. It feels a bit smoother (no lag on unlock) on my T805 and the people making the kernels prefer it.
[Galaxy Tab S Android Development] aljoscha81:
ok and you use cr droid with the mod kernel?

any crashes?