yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S2 Android Development] engine95:
Heat. That's what dictates how any computer runs. Higher clocks, and overvolting generate more hear. That's probably the cause of your reboots and loss of root. The big cores generate more heat than the littles. Even at the same clocks.

Every tab is different so I can't give specific volts or clocks for everyone.

You do know our stock clocks are 1.9 and 1.3. But you probably dropped them for the fork migration.

Enough rambling.

2.2 will probably need to be overvolted to run. It may need more than the max I allowed.

For overclocks, take 1 CPU at a time, and raise the voltage 1 value and see if it's stable by running it for a while. If it is, move on to the next. Reboots being the most common sign. Freezes and studders can also happen.

Now, the trick to run faster, is to undervolt. Stock is rarely right. So it's best to start with stock values and follow the above, just dropping by 1 value at a time. It's not uncommon to be able to drop 2-4 values.

While saving battery, it'll also reduce heat so your tab can run faster at the same heat.

It's time consuming, but it's the best way I know of. And yeah, remove the apply at boot setting. Synapse has a stability selection along with boot so make sure you select that if nothing else.

I haven't used ex for a while so it must've been updated. Guess I'll check it out. I did find that Synapse was more reliable, so just be aware.
[Galaxy Tab S2 Android Development] Likos88:
Sm-t715

I test 2.1 and 2.51 working perfect at full speed thanks amazing job :cool: :good::good::good:
[Galaxy Tab S2 Android Development] Extreemator:
Is it possible to to add 80% battery charge restriction? For battery wear reduction.
[Galaxy Tab S2 Android Development] engine95:
Maybe? But I couldn't do anything with battery and charging other than the stats. Things have changed a lot with Nougat. I can't find the settings or files anymore.
[Galaxy Tab S2 Android Development] engine95:
Just a little update:

Fully patched to 25 will be up for all 4 kernels in the next couple days. Pretty sure I have all the kinks worked out finally. 13 and 23 were a bugger to get through.

This will bring all 4 kernels up to 2014. Yes, Samsung has added security patches along the way, and that's what's making it difficult to fully patch them. I'm having to figure out what each patch has changed.

I'm not sure how far I'll take all 4 kernels. It's very tedious and time consuming. But right now, I plan on bringing them all up.
[Galaxy Tab S2 Android Development] engine95:
V3.26 for all 4 are in OP Synapse enabled, but not required. Will install with stock values. If there's issues, see post #2 for Synapse info.

I managed to add one more patch, so it's at 26 instead of 25. :cowboy:

It's getting harder to add these patches as we just got to when SeLinux was brought in. Dec of 2013.

These kernels are now patched to Jan 9th 2014.

As I said above, Samsung has been apply random patches to keep our Tabs safe. But i'll keep trying to update them properly.

I've been running these and all seems fine. The logs seem fine too. But, because Samsung hasn't used all the patches, it may introduce new problems. Just be forewarned. As i said though, from what I can tell, they're all running good. :good:

Enjoy
[Galaxy Tab S2 Android Development] sebmue:
My results after some weeks of use:

1. Since Synapse support I have standby battery drain. W/o use battery lasts only some days. Using version 2.1 I have nearly endless standby time.

2. Although I guess it is ROM related I want to mention it, as I cannot find a ROM alternative: auto brightness sensor is absent, no sensor data is found. Using Poseidon Rom https://xdaforums.com/tab-s2/development/rom-poseidonrom-v1-0-deodexedrooted-t3590228

Anyone else with these issues?
[Galaxy Tab S2 Android Development] engine95:
Is that with the app installed?

I know Synapse uses more battery. I've read it in the linked threads. But if the app isn't installed it should run normal. With less battery drain.

Let me know. I've been debating whether to have 2 versions of the kernels. One with and one without Synapse.
[Galaxy Tab S2 Android Development] sebmue:
Ok, I will check that in the coming days and give further feedback. I guess I also have to change the ROM. Do you have a suggestion which to use? Not easy with T-715 (T-710 roms should run fine though).
[Galaxy Tab S2 Android Development] engine95:
The only one I know of is mine here. https://xdaforums.com/tab-s2/development/rom-neked-maker-n-s2-s-6-4-17-t3616947 You would need to Odin back to stock to install it. It's mostly just a script that removes the bloat, has a wifi fix and screen mirror fix.

I'm just not a fan of the addons or xposed. They slow the Tab down.
[Galaxy Tab S2 Android Development] andyroidking:
I don't have an issue at all. I'm not using synapse but i do have it installed.... I have 5 days with 4:51 hours screen and 35% left....
[Galaxy Tab S2 Android Development] andyroidking:
My bad... I've been using v2.51. I'm installing the latest and will see what happens during the week at work. I usually don't use it much during the week so I will see what happens in the idle time.
[Galaxy Tab S2 Android Development] mankvl:
[MENTION=1280108]engine95[/MENTION] is this kernel compatible with magisk root? I have problems loosing it ?
[Galaxy Tab S2 Android Development] engine95:
It should work for any root. I don't root them so everyone can root how they choose.

SU works for sure, but I have no idea about magisk.

I would have to say it's a rom issue, or magisk. Make sure they're for nougat.
[Galaxy Tab S2 Android Development] sebmue:
Have installed Magisk 14.2 on engine95 latest version yesterday. Root works fine.
[Galaxy Tab S2 Android Development] sebmue:
Ok, I can state that the current version and Synapse do not have negative battery impact. I have flashed the current Odin file for the T715 and N4N kernel. With active Synapse settings I get following battery runtime. Thank you [MENTION=1280108]engine95[/MENTION] :)
[Galaxy Tab S2 Android Development] andyroidking:
Okay here too with no Synapse tweaking (it is installed).
[Galaxy Tab S2 Android Development] engine95:
V3.57 for all 4 in the OP Just Linux patches to 3.10.57

Looks like we got another update, which I did not even expect. Just I6, but an update none the less.

I'll need to compare source to see what I'll do.

This kernel should run on the update, but I haven't tried it yet. So make a backup first if you try it!

This thread is getting pretty messy when viewing it on a phone, so IF I decide to keep doing this, it'll be in a new thread. I really just need to start USING my Tablet instead of tinkering with it. :silly:
[Galaxy Tab S2 Android Development] engine95:
So here's the skinny on the I6 update. I5 for the 815.

Looking at 710 source which I just got, source is usually pretty consistent across all 4 kernels, there has been a MAJOR rewrite of our WiFi. Almost every file has been modified. I don't know if this has to do with the new WPA2 security flaw or not. Hopefully Samsung fixed it back in Sept which is when this update was made. Or we may be getting another update shortly, as Google just announced it was releasing a fix this month.

Because of this, I won't be updating or merging the new source to this kernel. (It's just too many files for me to screw up. :eek: ) I'll do ground-up builds again in a new thread. So this is as far as this version (CL) will go.

I'll need to request source for the 810, 715 and 815 so it'll be a anywhere from 3 days to a month to get that source. 710 source took a week.

Synapse is built already so that shouldn't take much to work. I did find I could add the Screen mirror fix to the kernel. So look for that is the I6, I5 builds. As well as the Wifi fix for "ALL" countries.

I'll probably make the I6 kernel more towards multi-core instead of single-core/battery. And go from there.

Patches will be waiting a month or 2 to see if we get updated again.
[Galaxy Tab S2 Android Development] andyroidking:
You're a madman! Take your time. Great job keeping this device up to date! And screen mirroring is something I didn't think I'd see.... Thanks again.
[Galaxy Tab S2 Android Development] sebmue:
Thank you again for your efforts! This really adds value to our good old tab... :)
[Galaxy Tab S2 Android Development] shoonari:
3.57 works fine on my t715! Just installed, with small UV.
[Galaxy Tab S2 Android Development] engine95:
Thank you again [MENTION=4237200]sebmue[/MENTION] for the donation. Very much appreciated.

Still waiting for source for the 715, 810, 815. I have started on the 710. UCI/Synapse makes me build the kernel out more for it to function, so it'll take me a little longer. I'm trying out some new things and have added others. I may be able to bring in some new govs and schedulers. But with Synapse and adding all the TCP Congestion control, It's growing in size quite a bit.

So I need to ask you all, which, if any TCP Algoritms would you like me to add. "Cubic" is default and "Westwood" seems to be the most preferred, but we still have 11 more I've added. But at the cost of size. And if/when I start adding govs and schedulers it'll grow even more.

And just a little FYI. If we do, by some weird chance get "O", I won't build for it as I wont be using it.

"M" was awesome, "N" took some away, but "O" is ridiculous. Google really stepped backwards on this update and created a battery hog. Not to mention Google assistant that you can't control anymore. I'm seriously considering going back to "M" on all my devices.

Security, OK. But don't take my privacy away. Google used to be about customizing and freedom to do so. But "O" makes me feel like it's an Apple. And I despise Apple. I remember their history.

Enough for my rant. :silly:

Let me know if you have a preference on TCP. If not, I'll just go with a few of the popular one's.

Edit: A little more ranting

The best 2 phone I've ever had were,

HTC Vogue- Windows based, but ran Cupcake and Doughnut. So yeah, I've messed with Google stuff for a while

Palm Pre- Too bad HP bought it and ruined it

End of rant.
[Galaxy Tab S2 Android Development] sebmue:
From my experience I would say - offer three TCPs which are least redundant and offer best value from your point of view. I'm again and again confused by have too many choices with too little explanation. Filtering is a vital service from experts for users :)

Anyway, if there are plenty of wishes for dozens of TCPs - fine with me as well. I'll stick to default or go with westwood...

Also had a Palm Pre. Loved the hard and software interface - webos and the slide keyboard was really great. Too bad they did not implement a kind of Android compatibility layer for building a sustainable user base. But these days hardware might have been a limiting factor...
[Galaxy Tab S2 Android Development] andyroidking:
Only issue is really slowwwww charging now. Use to go from 15% to 100% in about 3-4 hours (that was 2-3 versions back). Right now it has been charging for 6 hours and it only went from 24%-90% so far. I have been charging overnight lately so I just noticed this. I'll keep an eye on it.
[Galaxy Tab S2 Android Development] engine95:
I've noticed that since we've gotten N. But it's hit and miss. Sometimes it's slow, other times normal. I just charged my Tab from 75 to 100% in an hour. For me that's good. I kinda wonder if Samsung got scared with the battery blow ups.

It's something I haven't messed with but it's also contained in dts files that I haven't touched. Although I have noticed different numbers between all the Exynos Tabs.

On a side note,

Things have been hectic for me lately, but I should be able to finish the 710 kernel in the next few days. The others will follow soon after.

I haven't been happy with the way the new kernel is running, so I started over from scratch, adding files one at a time, then testing it, to see what's up.
[Galaxy Tab S2 Android Development] engine95:
I could write a novel with everything I've had going on lately. So here's the short version.

I just got source for all 4 kernels, and I have time to start working on them now. I'll be starting from scratch for ALL of them. (Part of the novel) :silly:

Synapse will not be enabled in the first versions. They will be ground up builds that Synapse will be added to later. (Another part of the novel)

The issue I'm having now is getting the .tars for the boot.img from UPDATO. I don't have time to get it from Samsung. And UPDATO seems to be having issues to DL from. For me at least. I've tried 3 different browsers and can't get it to dl.

All I need is the boot.img, untouched, and straight from the .tar - 715-I6, 810-I6, and 815-I5 is what I need

Here's how:

Linux is best, but you can do it from Windows with 7zip

Just rename the file by removing the ".md5" at the very end. Extract it, and upload the boot.img for me. Please :o

It cannot be pulled from your Tab as it'll be modified.

I don't have 12hrs to dl them from Samsung. At least UPDATO used to do it in 3 or less.
[Galaxy Tab S2 Android Development] andyroidking:
here it the 810-i6 clean boot - https://drive.google.com/open?id=1L0Iw-r794q3gKjFbU650Urw3mAiu1_1H
[Galaxy Tab S2 Android Development] andyroidking:
here are the 715 and 815 clean boots

715 - https://drive.google.com/open?id=1VtEMF4HrlwYPbiSFNCG3ZWtbf3qk4RnX

815 - https://drive.google.com/open?id=1BgTWdGk5OUawf0p6vCDw4-GQSQZkbHn-
[Galaxy Tab S2 Android Development] engine95:
Ok. Now I gotta ask. How did you get these? Am I having a brain cramp using Updato? I used it for the 710 a while ago with no issues. But not now. And caches aren't the issue because my computer has been redone. Another part of the novel.

Regardless, thank you. I have all but 815 bases done. Then I can start building them out.
[Galaxy Tab S2 Android Development] andyroidking:
I had already downloaded the 810 from Sam mobile last week and I downloaded the other two while I slept last night. Sometimes it doesn't work for me either I couldn't get it from the other place.
[Galaxy Tab S2 Android Development] shpitz461:
hi, i flashed this kernel on a T810 and I'm getting a boot-loop.

I'm running AospExtended ROM.

Is this kernel for TW only? or AOSP as well?

I didn't flash SU since it has magisk already, do i need to flash SU regardless?

Thanks!
[Galaxy Tab S2 Android Development] donaldtrump388:
Same on T710
[Galaxy Tab S2 Android Development] engine95:
Sorry, I missed this one.

It's for stock only.

I'm not sure I'll build for ASOP or others as they still have issues that make them not daily drivers for most.

The post right after that answers the wifi.

Wifi sticks after a reboot or 2.
[Galaxy Tab S2 Android Development] Bassam238:
Please help SM-T817P

Hello, Does kernel build 810 works on device model SM-T817P, kernel build T817PVPU2CQE7? I've flashed kernel 810 in my device, it boots normally and function for about 1 min then reboots automatically infinite loop.

I hope I did not ask a silly question, if I did my apology.
[Galaxy Tab S2 Android Development] engine95:
Unfortunately, no. The 817 is actually quite different from the other Exynos. I used to build for it. The I6 or the one before has a Nougat build. But it's also bootloader specific. A 3 instead of a 2 in the build number.
[Galaxy Tab S2 Android Development] Bassam238:
I've searched all xda for custom kernel but did not find one, is there a way I can personally modify my kernel to premessive enforce to support loop device since I did not find custom kernel for my model
[Galaxy Tab S2 Android Development] engine95:
You mean a permissive kernel. They come stock enforce. Kernel Auditor, or MTweaks, both on XDA, should make the kernel permissive. SeLinuxChanger on XDA might still work too.
[Galaxy Tab S2 Android Development] Bassam238:
Thank you very much for your help. Yes permissive kernel. I've tried kernelAuditor and SELinuxModeChanger before posting, also I freezed knox apps but did not work, moreover I tried MTweaks now as you said but it returns error 'SELinux state: kernel not supported. Is this because of android version 7.0?
[Galaxy Tab S2 Android Development] IngoPan:
So this one works with rooted RB1 stock rom (i am running xposed) ?

Thanks, i am getting mad with all the different stuff.

Regards!
[Galaxy Tab S2 Android Development] BakaNeko59:
Does anyone know if this will work with an Sm-t813?
[Galaxy Tab S2 Android Development] engine95:
No, it won't. 813 is a Qualcomm Tab. All of these are for Exynos. I don't think anyone builds for the Qualcomm's. I can't because I don't own it.

I noticed in your sig that you have an Iconia. I still have my Acer Iconia. Although I haven't used it in years. It was a nice Tab in it's day.
[Galaxy Tab S2 Android Development] Nanti1:
With new Magisk 18 don't work in T710 😟 Brick at reboot.
[Galaxy Tab S2 Android Development] engine95:
No it doesn't. In the op, you use SuperSU.

The latest kernels are here and you can use either. https://xdaforums.com/tab-s2/development/kernel-9-11-18-rg2-rh1-710-810-715-815-t3841316.

Or, if it's too new, look for the other kernels in this forum. I think RB1 was the earliest one I built that was compatible with Magisk.
[Galaxy Tab S2 Android Development] Nanti1:
Hello, thanks for your quick response. I've tried all the n4n kernels and none of them work with magisk 18.

I've tried all versions RB1,RG2,RH1 Kernel for 710. ?

Freeze at first logo on boot.

With Magisk 17.1 all work fine.
[Galaxy Tab S2 Android Development] engine95:
Don't use 18 then. I hear it's buggy, right now. I'm sure it'll get fixed. If not, then we'll just have to stay with 17. It happens sometimes.

SuperSu went through similar issues in it's day.
[LeEco Le Max 2 Questions & Answers] Kazing:
Seems like [MENTION=4195844]show-p1984[/MENTION] got a Le Max 2 as he posted it on g+.

Also seems like there is something going on at his git and his chat.

X2 repo?

git.bricked.de/Bricked/x2

Bricked Chat:

chat.bricked.de

Bricked Kernel for the Le Max 2 incoming?

PS: can't post links yet. :(
[LeEco Le Max 2 Questions & Answers] show-p1984:
I am indeed working on a kernel.

:D
[Acer Iconia A500] keke10501:
Hi !

Like many other I was stuck on the ACER screen.

After many attempts, I finally had my CPUID with Ubuntu and I restarted my A501 with the A501EUUs file.

But now I'm on the 3.0.1 version, and ACER_A501_0.017.01_PA_ATT as build. Now the OTA doesn't work.

So I'm looking for the Acer_A501_1.309.02_COM_GEN1 to revive the OTA.

Unfortunately all of links that i've found on internet were dead, even the torrent ones.

SO if anyone has this file, please could you send it to me ?

If it's wothless, I plan to install a custom firware but i've read that many are not stable. If you have some tips :)

Thanks you, you have been very usefull to me !
[Acer Iconia A500] turnert:
I would recommend installing a custom ROM, I've tried most of the roms for this device and the best one seems to be omnirom 4.4 from tegraowners but that site seems to be buggy at the moment. So I would just suggest one of the KitKat roms on this forum they are fairly stable and most features work.
[Xiaomi Mi 4C] viscorp:
This thread is moved to "Android Development" the link here;
[Xiaomi Mi 4C] andro_diggers:
thanks for the ROM,

downloading,,,,,,
[Xiaomi Mi 4C] solis_f:
So this is for nougat bootloader only?
[Xiaomi Mi 4C] andro_diggers:
just realize this is for nougat bootloader...

:'(
[Xiaomi Mi 4C] insomnia11:
*checkpoint ;)

Thank's. Finally we have an official maintainer for libra device
[Xiaomi Mi 4C] Grellenort:
Nougat bootloader, very good, thanks for share this rom :)
[Xiaomi Mi 4C] viscorp:
Yes,It's for Nougat bootloader only.For lollipop users can update the bootloader and TWRP to flash it.If you have new idea to support both Nougat bootloader and Lollipop bootloader you can reply me.
[Xiaomi Mi 4C] fauzanmcs:
i think, ur thread move to AndroidDevelopment

sorry for bad English language
[Xiaomi Mi 4C] viscorp:
I will do it.
[Xiaomi Mi 4C] bshi:
I hope this rom won't drain the battery.

My battery is getting older.
[Android Q&A, Help & Troubleshooting] dubis999:
Hi,

In this list of dev, I would to know which one is the rootfs :

s -l /dev/block/platform/d0074000.emmc/ <
lrwxrwxrwx root root 2015-01-01 01:00 boot -> /dev/block/boot
lrwxrwxrwx root root 2015-01-01 01:00 bootloader -> /dev/block/bootloader
drwxr-xr-x root root 2015-01-01 01:00 by-num
lrwxrwxrwx root root 2015-01-01 01:00 cache -> /dev/block/cache
lrwxrwxrwx root root 2015-01-01 01:00 crypt -> /dev/block/crypt
lrwxrwxrwx root root 2015-01-01 01:00 data -> /dev/block/data
lrwxrwxrwx root root 2015-01-01 01:00 env -> /dev/block/env
lrwxrwxrwx root root 2015-01-01 01:00 instaboot -> /dev/block/instaboot
lrwxrwxrwx root root 2015-01-01 01:00 logo -> /dev/block/logo
lrwxrwxrwx root root 2015-01-01 01:00 misc -> /dev/block/misc
lrwxrwxrwx root root 2015-01-01 01:00 mmcblk0 -> /dev/block/mmcblk0
lrwxrwxrwx root root 2015-01-01 01:00 mmcblk0boot0 -> /dev/block/mmcblk0boot0
lrwxrwxrwx root root 2015-01-01 01:00 mmcblk0boot1 -> /dev/block/mmcblk0boot1
lrwxrwxrwx root root 2015-01-01 01:00 mmcblk0rpmb -> /dev/block/mmcblk0rpmb
lrwxrwxrwx root root 2015-01-01 01:00 recovery -> /dev/block/recovery
lrwxrwxrwx root root 2015-01-01 01:00 reserved -> /dev/block/reserved
lrwxrwxrwx root root 2015-01-01 01:00 rsv -> /dev/block/rsv
lrwxrwxrwx root root 2015-01-01 01:00 system -> /dev/block/system
lrwxrwxrwx root root 2015-01-01 01:00 tee -> /dev/block/tee

Thanks for your help.
[Sony Xperia XZ Premium Questions & Answers] nomailx:
Ok guys, to tell you the truth, i am waiting for the Note 8, expecting it to have a 4k Display. But it may not come with one. Therefore i am checking some options, and the only phone with a 4k Display is the Sony Xperia XZ Premium.

This phone has the best processor display etc. But Sony, (as always) manages to bring the latest technology but is never able to make it compatible with anything. (Like the PS3 which came with the best processor ever (CELL), but devs couldn't properly code for it, so many titles were not converted. Or again the PS3 which supported online browsing, but not Youtube). And even Sony just dropping support for the VIta's Playstation Now, which in fact would be the most relevant gadget to use the Playstation Now feature.

What I mean is that many times I had very bad experiences with Sony on that regard and for some reason Sony likes to troll with their technology and at the same time shoot themselves on the foot with each new product they release....

-------------------------- This Said, enough rant about Sony, and here's the questions.

The XZ Premium has a 4K Display. Awesome. It's Overkill unless you use it for VR right? Well, from all the reviews and product specification listings I could gather, it seems that Sony, again, managed to push the best processor and display into a phone but didn't make it compatible for VR. (Again, sony is trolling).

But yet, I read a few posts where some claimed that they are using the XZ Premium for VR.

So is this true guys? Does this phone support VR or Daydream?

thank you for answering.
[Sony Xperia XZ Premium Questions & Answers] ajai_dev:
I bought the S8 after waiting for ages for the XZ Premium specifically for VR but then I was told by a Sony engineer that the fact its a 4K display along with the LCD panel makes it super laggy and the only way forward for VR is OLED. This means VR gaming or anything interactive is out of the question but 360 degrees 4K movies might be fine again am not 100% you wont puke after seeing it tough
[Sony Xperia XZ Premium Questions & Answers] X10iMark:
I'm just using VR for the first time, but I'm not having any problems with it. When I put a full hd phone in there I can see the pixels, but with 4k xzp I don't even notice them.

4k VR content isn't the easiest to find either, I haven't even touched games yet let alone a VR game that can run in 4k. (Does any1 know if they even exist, I'll look into it tomorrow)

You'll find the described problems with any other company too.