yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S Android Development] shaglord:
This might not be useful but I thought I'd mention it. When playing high quality high bitrate h264 2560x1600 videos in VLC, quite often decoding goes into software mode after which the tablet overheats and stops playing.

The workaround is to force vlc to use hardware decoding only. Sometimes vlc needs to be restarted to successfully do hardware decoding.

I use Handbrake with Intel Quicksync to very quickly transcode x265 (or newer) 4k downloads into a maxed out format for this tablet. It looks amazing. Once you have a preset in Handbrake any 4k movie just takes like 5 seconds to initiate the conversion and about an hour wait on a low power (10w) intel system.
[Galaxy Tab S Android Development] glennza:
Any progress with this? Is it possible to move drivers across Android versions? Could I just pull the drivers etc from the ROM that works and use them in your current ROM? (not that I know which drivers they are!). I think it's an issue with Lineage and there aren't any recent non-Lineage ROMS.
[Galaxy Tab S Android Development] Hazou:
So, you know a android 10 rom where it works?
[Galaxy Tab S Android Development] glennza:
No, they are all from the same source - LineageOS. There's really not a lot to choose from for this device
[Galaxy Tab S Android Development] Hazou:
Oh, my bad. Didn't read it right. On what AOSP/CM rom does it work?
[Galaxy Tab S Android Development] glennza:
It was this one...

[ROM][7.x N][OFFICIAL] AICP 12.1 for SM-T805

. . . . AICP Android Ice Cold Project AICP is known by everyone as Ice Cold Project that started on Desire HD and since then evolved into a mature ROM with the BEST community you can find!!! Until Lollipop, Rom has always been AOKP...

xdaforums.com
[Galaxy Tab S Android Development] shaglord:
I'm tempted to go Android 11 Lineage 18 simply becuase PIP windows are resizeable. :p

If there was a build with Deathly like Hazou's I would have no reason not to switch. :cool:
[Galaxy Tab S Android Development] glennza:
Apart from apps force closing all the time!

I don't know if anyone has incorporated Hazou's Mali fix either
[Galaxy Tab S Android Development] Samuel8766:
Hey could anyone recommend a good task killer?
[Galaxy Tab S Android Development] glennza:
@Hazou

I thought I'd try the LOS 20 ROM to see if that had the same Bluetooth issue. Installed and Bluetooth works fine. I think I'll just stay on that version as everything I need seems to work. Saves you the bother of trying to fix it :)
[Galaxy Tab S Android Development] Qu@rk:
SM-T800 (chagallwifi), LineageOS-17.1-29-10-2023

"recently opened apps" screen does not work.

I have had this problem for several months.

The navigation button works find if I select a different function for example start camera.

What can I do?
[Galaxy Tab S Android Development] shaglord:
My recently works. Maybe it's corrupt or didn't install properly. You should wipe certain partitions before installing and it helps if you once had the lastest stock rom installed before installing this rom.
[Galaxy Tab S Android Development] Qu@rk:
Thank you. I have used this rom for a very long time.

After I flashed a new Hazou release the "recently used apps" stopped working.

Unfortunately I can not recall which release it was. I just noticed that it was not working any more.
[Galaxy Tab S Android Development] shaglord:
Dirty flashing (to preserve data,apps) is always risky. You could try dirty flashing the latest version again and see if you're lucky to get it working again. Wipe dalvik+cache partition before booting.
[Galaxy Tab S Android Development] Qu@rk:
I would not call it "dirty flashing" if I flashed only an updated image of the same ROM. It would be completely impractical to do a clean flash every time you would like to update a ROM.

Thanks for the suggestion. I already tried reflashing the latest image and also latest openGapps (micro) again as suggested by other users, but it did not change anything. So I guess if I can not live without "recent apps" I will have to do a clean installation by wiping the system partition etc.

I still try to avoid this clean flashing because I have a lot of apps installed and configured.

At the moment it is a bit uncomfortable but manageable.

I tried to do a nandroid backup (TWRP) of system and data but the backup of the data partition always fails (TWPR crashes) no matter which destination I select, internal, external sd or even an usb flash drive. So I will have to start completely fresh without a chance of turning back.
[Galaxy Tab S Android Development] shaglord:
I see what you mean. Do you have the latest twrp?

It should be able to backup so you can play around. Check if the error is something simple like not enough space.
[Galaxy Tab S Android Development] Qu@rk:
I have had the backup problem for years. I updated TWRP, deleted files in data, because there had been reports of too many files and TWRP's backup crashes, I reformated the external SD, used a blank USB flash drive (32 GB) etc.

One time the backup worked with the USB flash drive a view days later it did not work any more. I was not able to solve this problem. If I backup only the system partition it works.

Otherwise I would flash the ROM clean and check whether everything works better (a bit smoother again, recently opened apps etc.).

Would you still stay with Hazou's LOS 17.1 at the moment or is there a very good working LOS 20 for the SM-T800 (chagallwifi)? I am not up to date with my research.
[Galaxy Tab S Android Development] shaglord:
Well sounds like there's some corrupt data there then. Maybe there's a backup app you can use to restore most of your apps and settings.

I've heard positives and negatives about Los18 and Los20 builds. Some people have a look but I think most of them come back to Los17.

Remember that if you do make a fresh install to ensure your device has had the latest stock rom installed at least once. I think it's dated 2017. You can download it on samfw.com and use Odin.
[Galaxy Tab S Android Development] Qu@rk:
Oh that's interesting, I did not know there was a stock rom from 2017. I thought I had the latest stock rom installed before my first flash of LineageOS 14 (or was it still Cyanogenmod at that time? hihi).

I will try that.

I fear I have to start fresh and clean to make this old tablet usable again. Thanks for your kind support.
[Galaxy Tab S Android Development] Qu@rk:
Some questions because I have not done this in a very long time:

A clean install would be:

flash latest stock from samfw for SM-T800 (for my country) with Odin3 on Windows

(I would prefer Linux but all tools are very old) Do I have to wipe system/data first?

install latest TWRP for chagallwifi

wipe system and data

install latest relase of Hazou's rom Samsung T700/5 T800/5 LineageOS-17.1-29-10-2023

install MindTheGapps-10.0.0-arm-20230922_081033

I always used openGapps (micro) but as far as I understrand MindTheGapps (ARM) is recommended. Correct?

Do I have to flash someting twice? I recall something from a long time ago, that you had to flash twice, rom or gapps.

If I flash the stock rom with odin, will my internal sd memory keep untouched?

I think I found a way to backup my apps and appdata with NeoBackup (open source) and installed Magisk. Just in case.
[Galaxy Tab S Android Development] Qu@rk:
Well, it seems to work but I had to install OpenGapps (micro).

The installation of MindTheGapps always failed (could not mount system).

I tried several different approaches but nothing worked (wiped again, directly after rom etc.).

Wiped system/data again, installed the rom.

With OpenGapps 2022/02/15 (latest) it worked immediately.
[Galaxy Tab S Android Development] Qu@rk:
So I tried MindTheGapps again, but with no luck. I always get the error: "Could not mount /mnt/system".

I tried all approaches and suggestions I could find. I am on TWRP 3.7.0.

I installed OpenGapps pico and had another problem with a boot loop after language selecting in LineageOS after first boot. So I wiped everything incl. format data (except external sd) again and after several tries it worked finally. Very strange. I always flashed Gapps right after I had flashed the rom.

With OpenGapps micro it worked immediately but with pico I had some troubles.

Did anyone succeed flashing MindTheGapps with TWRP?

If yes, which TWRP version?

Should I stay with OpenGapps or would it be highly recommend to use MindTheGapps?
[Galaxy Tab S Android Development] shaglord:
I don't know if Opengapps is superior but that's the beauty of running Los17 or 18 that you can use good and trusted ol' OpenGapps. I run the pico version and it worked immediately.

The worst issue I ever got was perhaps a long boot time at the Lineage animation. A quick reboot and wipe dalvik+cache partition always fixed it.

Sorry for replying late. Yes, that list of steps look right. Nice work! For root/Magisk you need to patch boot.img. Then you get access to Deathly which is super nice. You get undervolting, speaker volume boost, fast charging speeds, faster UI by bumping min GPU freq to 177MHz, less throttling by capping cpu freq. All good stuff.
[Galaxy Tab S Android Development] Qu@rk:
Thank you very much. One thing is important to report for future readers:

--

Flashing the stock rom with Odin wipes your internal sd card. Maybe I missed an option in Odin.

A backup is highly recommend (as always).

The external sd card was unaltered. But remove it or make a backup.

And of course you have to install TWRP again. I used Heimdall on Linux, one command, no drivers mess compared to Windows.

- -

I have used Magisk before and had a look around in Deathly but I was unsure what recommended settings are, so I left everything on default.

The "totally extreme" clean installation of Hazou's rom with OpenGapps pico (used micro before, bad idea and unnecessary) resulted in some improvements: a bit smoother UI, less battery drain (e. g. overnight, only 1%).

Thanks for the tip with the boot time. But I did not notice any prolonged boot/reboot so far.

I will have a look into Deathly again after the installation of Magisk (boot.img).

Do you have recommended (safe) settings that I can try or a good starting point?

Or a link to a tutorial?

Again, thank you very much. Happy Easter!

Oh I forgot: Hazou, thank you very much for your incredible work.
[Galaxy Tab S Android Development] shaglord:
It's all safe because if your tablet crashes just reboot it and the settings will go back to default. When you want to keep a setting you can "enable on startup" which you can set for every page individually.

The power (charging) page is easy. I just drag all the currents to max. Makes a solid difference. For the cpu and gpu you have to fiddle until you find a stable one you like. I'd recommend bumping up gpu minimum frequency to 177 for a smoother UI.

I undervolt by 100 - 93.75 mV on both CPU and GPU. I cap the max cpu freq at 1800MHz. I suggest you to start with like 1600MHz if you haven't got a thermal pad mod.
[Galaxy Tab S Android Development] teohub:
If you dislike to reinstall all your apps, use migrate_4.0_NG. It makes a Backup of all your Apps and Settings. After clean install of the new Rom you can Restore all your apps and settings at once.

[APP][ROOT][5.0+][1st Nov 2020] Migrate - custom ROM migration tool

Jumping from one custom ROM to another can be a challenging task. So I decided to make an app to simplify the process. Introducing Migrate! Migrate-GPE (v4.0) is on Google Play It was temporarily suspended. Read more here...

xdaforums.com
[Galaxy Tab S Android Development] Qu@rk:
I have used NeoBackup, works very well (needs root of course) and is very well maintained.

Available on Fdroid.

For a clean installation I would recommend to restore as less as possible. Many apps have an integrated backup/restore of their settings. Many years ago I used TitaniumBackup and I always had problems eventually with restored apps or messing up the clean installation. I would recommend these backup tools only in case of emergency, just to have a fallback strategy for specific apps.

GitHub - NeoApplications/Neo-Backup: backup manager for android

backup manager for android. Contribute to NeoApplications/Neo-Backup development by creating an account on GitHub.

github.com

[APP][8.0+] [OPEN SOURCE] [ROOT] Neo Backup - Apps and data backup tool for Android.

Neo Backup (formerly OAndBackupX) is a fork of the famous OAndBackup with the aim to bring OAndBackup to 202X and part of Neo Applications suite. For now the app is already fully rewritten, coming up would be making it robust and adding some...

xdaforums.com
[Galaxy Tab S Android Development] jojoapp:
i have install hazouph version on my SM-T705 (Klimtlte)

But the mobile data can't work, although it can make a phone call.

whatsapp cant use mic/ the input sound are very low

my phone got stolen and to revive this tab is my only option i can choose.

can anyone help me? sorry for my bad english
[Galaxy Tab S Android Development] shaglord:
I don't know because I don't use cellular on these but....

I just wanted to suggest to put the latest samsung stock rom on the tablet before going with hazou's rom. That way your tablet is fully updated before switching the os. There are many firmwares Hazou's doesn't alter and probably depends on.
[Galaxy Tab S Android Development] jojoapp:
thank you for your reply,

is there any chance that you will try it?

I already installed the latest stock room which is 6.0.1 before installing Hazou's rom, but still... the mobile data doesnt work either
[Galaxy Tab S Android Development] shaglord:
Oh. Sorry. I don't know then. Perhaps the 18.1 rom will work better?
[Galaxy Tab S Android Development] jojoapp:
do you have any link post or firmware that work higher than android 8 on SM- T705? really need this tab to revive, no other affordable option for me right now, thanks
[Galaxy Tab S Android Development] shaglord:
[ROM][UNOFFICIAL][11]/[R] /e/OS-R (LineageOS 18.1 based) for Samsung Galaxy Tab S (SM-T700, SM-T705, SM-T800, SM-T805, SM-P600)

/* * I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed (like it did for me...). * Please do some research if you have any concerns about features included in the...

xdaforums.com
[Galaxy Tab S Android Development] jojoapp:
What about the link of 18.1 you mentioned earlier, the link that you sent me was not a lineage but something else e or something, is that okay?

I thought that you had the 18.1 lineage link
[Galaxy Tab S Android Development] shaglord:
I think it is Lineage but with some customizations.
[Galaxy Tab S Android Development] terho:
Same for me, hazou 17.1-20231029 on my T705 had no LTE. Which is a bummer because an earlier version I tried did work, but it had lag/memory issues which the hazou release seemed to fix, at least according to the release notes.

I tried Lineage 20.0 -> also no lte. Tried eOS 0.23-p -> no lte (and seemed buggy). I'm currently trying out the AOSP 7.1 rom by scubajeff, seems to work but it's Android 7 so fairly old. And it's abandoned, but then so are most roms here.
[Galaxy Tab S Android Development] jojoapp:
I'm currently using the Los 20 and there is a random app crash and a random reboot but the mobile data works.

Haven't tried the eOS tho because I don't have a laptop to install it yet. there is a LOS 16 i wanted to try, you can find it at page 2 or 3 Jimmijammi if im not wrong, at the los 20 thread. Could you please try the Los 16? BCS Jimmie said he using it and it way smoother than Los 17.1 or Los 20 but didn't share the detail about LTE.

I Wanted so bad to install the Los 16 but I can't without laptop, maybe you can try and share the result?
[Galaxy Tab S Android Development] terho:
I couldn't find it. Link it to me and I can try it, but it'll take a day or two since I'm going to work soon and I need the tablet.

Edit: got it, I'll try it later.
[Galaxy Tab S Android Development] jojoapp:
lineage-16.0-20230515-UNOFFICIAL-klimtlte.zip

This file has been shared with you on pixeldrain

pixeldrain.com
[Galaxy Tab S Android Development] shaglord:
I'm experiencing random youtube crashes but not in other apps. I'm just curious if you're having the same issue?

Maybe it's because I'm running revanced.
[Galaxy Tab S Android Development] jojoapp:
im also

im also using revanced and experience even a rrandom reboot. id ont think its because its revanced because other app like gmail, chrome etc are occasionaly running trough the same experience
[Galaxy Tab S Android Development] terho:
Well, I tried installing it a couple times. No LTE.
[Galaxy Tab S Android Development] jojoapp:
well how about the android 7 you want to try earlier?
[Galaxy Tab S Android Development] terho:
The one by scubajeff? It ran smooth and everything I need worked. No crashes or hiccups. It just has some AOSP-ness that I don't like, not very configurable. Lineage is nicer.

Although now my restored backup of it won't boot lol.
[Galaxy Tab S Android Development] jojoapp:
lineage-17.1-20221022-UNOFFICIAL-klimtlte

usiing this ROM and the mobile data works, just finished install it, so gonna check if there is any bug or not

edit: still curious about the android 9 before. because it seems we are different. i have mobile data at los 20 and you said you dont
[Galaxy Tab S Android Development] terho:
I installed either lineage-17.1-20221022-UNOFFICIAL-klimtlte or lineage-17.1-20230625-UNOFFICIAL-klimtlte back in January and ran it until a week ago. I can't remember which one but both are in my downloads, I'm guessing it was the newer one. Everything worked but it had lag and crashing issues which to me seemed like it was running out of memory. Things like changing/maximising videos in Newpipe, changing tabs in Firefox, basically doing anything "intensive" suddenly could cause it to jam so hard that it eventually rebooted. The audio would get stuck, making a loud KRRRRT noise. All this was why I started looking for a new rom again. Do tell if the 2022 build works, I could run that myself since I liked it otherwise.

The LOS20 I tried was lineage-20.0-UNOFFICIAL-MODIFIED-GAPPS-klimtlte (no build date?) and my notes on it just say no lte. But I also think Android 13 is maybe a bit too new and heavy for these poor old devices, Android 8 or 9 might be the sweet spot if there were roms available.
[Galaxy Tab S Android Development] jojoapp:
just finished setting up and download also install all need apps in lineage-17.1-20221022-UNOFFICIAL-klimtlte build. It was 84% battery when i post before and now its 53% just in a hour. im download a chrome, gmail, whatsapp, maps go, instagram, youtube revanced, micro g. cant compare with LOS 20 because i forgot how the battery usage on los 20, and i just download a lot of app.

the lineage 20221022 was by bluess57 and the 20230625 was by hazouph

i experience the same thing like you on LOS 17.1 but I'm on the LOS 20. except i had the mobile network. the 17.1 by hazouph didnt have the mobile data for me.

if only the 17.1 by hazouph mobile data was worked it would be the solution to revive this tab i think. it way more stable
[Galaxy Tab S Android Development] shaglord:
I have a question for you lte users. Isn't it better to choose the best rom (lte or not) and use the hotspot feature on your phone?
[Galaxy Tab S Android Development] jojoapp:
update: this maybe the best so far, no random crash no random reboot, lte work, battery usage okayish around 3 hour watching youtube revanced (idle almost 15 hour). there is a lag here and there when run and intensive work but only lag hang for a moment not random crash or reboot. bluetooth earphone work

havent test the mic
[Galaxy Tab S Android Development] terho:
I suppose I could technically do that, I just don't want the hassle. I don't have to remember to turn the hotspot on and off, I don't have to worry about the battery dying on the phone or it getting hot in my pocket, or the tablet losing connectivity when I'm farther away. I'd probably need to charge the phone daily instead of every two or three days. I like the keep the phone and tablet separate like that. Their "battery budgets" as well.

Not to mention that I bought this tablet specifically to use with mobile data on the go, so I'd like to get what I paid for.

Ok cheers, I might try that myself too.

Btw the best performance I've seen so far is from the AOSP 7.1 jeff rom, it's completely lag free. But it is almost seven years old by now.

I wish deadman would still do his LOS 14.1 builds, I ran one for three years and it only had minor problems. I bet they would be pretty good by now.
[Galaxy Tab S Android Development] Charuzu:
Good afternoon. Is there a new update for this Hazou build? Is the microphone, video recording, and fingerprint scanner fixed already?
[Galaxy Tab S Android Development] Wyjek:
Hi, is Hazou build considered the best right now? I don't care about camera and fingerprint, I plan to read comics on this device and maybe watch YouTube. @Charuzu I see that you post a lot in this topic, could you help me?
[Galaxy Tab S Android Development] shaglord:
Hazou's works fine. I've been using it for a long time.
[Galaxy Tab S Android Development] alfarex:
los archivos de la rom los podrían resumir que los link están malos
[Galaxy Tab S Android Development] shaglord:
Don't use the links in the first posts. Hazou here (in the last pages of this thread) provides the latest firmwares on his github page. There are links posted in the last few pages.
[Galaxy Tab S Android Development] saoudien07:
First, thank you very much for your different reply, there are a lot of interesting stuffs, and help me make a choice to try a Los firmware.

Still, there is some point that catch my attention, latest available Stock firmware available for the SM-T800 chagallwifi, is from 05.09.22.

I dont understand why you went with a version from 2017, or I messed something.

I am very close to your case, got that old, but still great Tab, that I wish to revive for little tasks.

Last time I tried Los rom on that firmware, it was complicated to read stuffs on OTG, I mean, if I connect a OTG USB with some movies in it, I had to copy them to internal Storage or SD card to be able to read them.

As some pointed above, I got the 16GB version, precisely SM-T800 chagallwifi, and it is full very fast, I still got a good 64 GB, but still need this OTG feature, to be able to read files on the USB. I tried different reader, still the same, some was kind of buffuring the file, to be able to read it when it is to larger or someting, and never open the file. On Stock Samsung, files on USB takes sometime to open but it works at least.

So can someone please relate how is the OTG experience with Los 17.1 by Hazou.

Thx you all.
[Galaxy Tab S Android Development] saoudien07:
I think it is safer to stay on Los 17.1, I dont think of asking to much from this tab.

About backup/Restore TWRP problem with this tab, I reduce it to heat. I mean, when I do a backup or restore, it freeze or reboot when it get to hot. When I cool it during those, everything goes fine.

I also use to make a note about the process for the next time.
[Galaxy Tab S Android Development] shaglord:
The latest stock firmware for the T800 came out in 2016 according to samfw.com. Update to that before going LOS please.

Some tablets seem to have been updated to a 2017 rom but not the T800 (if I'm reading this correctly).

Otg should work. Maybe it's a result of not being on the right firmware before flashing LOS. The los package is not a complete firmware. It's just a different system partition I think. There are tons of other stock partitions that it depends on to work properly.

Flash the latest stock firmware with odin first and then try los. The latest Hazou firmware for these tablets is dated 20231029. That's the firmware most people are using today.
[Galaxy Tab S Android Development] saoudien07:
The last firmware for SM-T800 is from 2022, not from 2016 nor 2017.

Thx to all for the explaination about Los firmware, I will give it a try.
[Galaxy Tab S Android Development] shaglord:
You're right. I think any of the 6.0.1 firmwares would work before installing Los. Then you have the right foundation.

To be on the safe side, try the latest or one of the latest stock firmwares.