yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] aoor0708:
How to rollback from 5.01 to 4.4 on Lenovo S-8-50

Some applications do not work under 5.0.1 and would like to rollback to 4.4

Any ideas ?

Thanks for help
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Use search and you'll find the guide.

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
Like JustPlayingHard said. I'm tired of rewriting all those guides :D I'm going to add them to OP so it'll be easier for everyone to find ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Thank you, I think we should create a sub Reddit with all the information and etc.

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
I don't use reddit ;) and most of users here probably don't use it too(on reddit there isn't even any message about this tablet)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Thought so, just thought it would be a good idea to have place where all the information would be other than xda

Sent from my Lenovo Tab S8 (S8-50F)
[Android Q&A, Help & Troubleshooting] social-design-concepts:
here is the twrp i generated for my Tab S8-50F : View attachment tab_s8-50f_recovery-twrp.zip
[Android Q&A, Help & Troubleshooting] Minto107:
It's flashable zip as I see? ;) How is your PSU?

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Installed via adb on computer and IT WORKS PERFECTLY ITS FAST OMG

Thank you

Edit: also hows the psu doing?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
no flash it through fastboot. good been beating my head against the wall over a build error in cm-12.1 now thats resolved back to working on making it boot.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Great news. I hope cm12.1 will be faster than this junk of a mess Lenovo called 5.0.1

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
It will. SDC always does a very good job ;)

When you'll have any build I can test ;) I know how logcat works so I can send logs and help in solving some problems ;) are you building ROM with LTE functionality or without? I can test even without but from time to time 4G is very useful ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
He did indeed.

I'll happily test builds also as long I can get it booting with log cats working :)

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] szczesny:
Installed Viper Audio. It works even when Dolby is On , and no crash. But it not always work from start.

And XiFi not working. It want to install 3 drivers. Some VFP, without VFP, Cortex Audio.Seems all 3 are incompatible with S8. After requored restart program still want to install one of 3 drivers. Mabe that prog can change something becouse it seems to have much options for modelling sound quality.

Not only Eqmlike in Viper.

And i did some testings of Vipers solom+ Dolby , all eq Max down/ Up settings, additional booster for volume in Viper, Optimisation mode.

Sad story Is, Its not Dolby etc problem Mr. minto.

Problem is in the very beggining of sound. Sound is damaged and these post processing programs may only modify the final output, but they can do nothing to change that distorted quality.

Its in most of Low-Hi frequency, and quality cant be boosted/ corrected by the equalizing settings etc.

They can add bass, space , highs or opposote , but they cant change Qiality of playback , which is tottaly wrong and brutally distorted most of time.

Cyanogen mog foe LTE version. Man, i would die for it. That was last tablet bought by lenovo. They destroyed that sound :( �� �� �� �� ��
[Android Q&A, Help & Troubleshooting] mac231us:
Yes 4G please (otherwise just like all the Samsung tablet phones...underserved cellular versions..understand not all devs own the 4g versions-wifi only usually the case) Thanks
[Android Q&A, Help & Troubleshooting] Minto107:
But in our case it's better. Samsung cellular tablets has mostly different WiFi modems and we have same tablet but just with added LTE module to motherboard

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[Android Q&A, Help & Troubleshooting] banmeifyouwant:
Wow. 3.18.8 kernel takes 2.5 seconds to boot on our device. :)
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Holy smokes that's fast! I wish I could donate to you for your excellent progress

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Do you have the kernel source up on git?
[Android Q&A, Help & Troubleshooting] banmeifyouwant:
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=8GWLRMT9H6TN8

---------- Post added at 07:52 PM ---------- Previous post was at 07:51 PM ----------

Not yet. Its wip. :cool:
[Android Q&A, Help & Troubleshooting] Minto107:
Nice job mate! This tablet has potential :D any news on your Yoga 2 port? ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Thanks, also forgot to mention that I'm only 15 so I can't really. Sorry : (

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] banmeifyouwant:
ATM I'm working on marshmallow for wifi only and a better fastboot to both model.

I need an LTE model for get the modem into working state.

Donate me guys. :angel:

PS.: If you have an LTE and you use only the wifi rom on your device.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
I'll happily try a early build of marshmallow

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
Same as me high five ;)

I will try to donate ;) never tried before but someday it needs to be this first time ;) I know that LTE and WLAN models aren't different in terms of hardware because LTE is just something like extension on the motherboard but you know how it is. When you buy an LTE model you don't really want to loose that feature ;) When your Marshmallow ROM will be ready I'm more than pleased to test and logcat of course ;) but no LTE=no daily driver also if you will publish sources on github it shouldn't be so hard just to add LTE drivers and functionality ;) Is LTE source included into Lenovo's open source that we can find on Lenovo website or you do all on your own? ;)

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---------- Post added at 09:46 PM ---------- Previous post was at 09:44 PM ----------

Better fastboot? Can you share more details? Sounds very interesting ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Yay.

Anyway, what you should it pretty much it. Just an extension to the motherboard, I think adding the driver then doing sorn wizardry it should work ;)

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
I think its even possible to try Lenovo drivers from official Lollipop because it's also almost pure AOSP(correct me if I'm wrong) on 5.1 it should work on 50%

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Possibility!

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
Yeah everything is possible but I think that our LTE driver should be rebuilt even if I never used it so far. I heard about overheating issues when using high performance games and LTE modem and I don't think that modem is faulty. Mostly software sucks not hardware, good kernel should do the job. Oh damn. The kernel of course... I have almost forgotten :D even if drivers will work we will need a kernel that will use our modem ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Drivers need to hook into kernel then that to hook into the hardware

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] szczesny:
For additional fps in games ,less battery drain, less heat production i reccomend changing resolution.

It works wonderfull. Put 1280x800 and it work like a charm. Jist need to correct shape pixels density and dpi .

Now , if less optimised alpha games in Fullhd have some fps drops, now on nice 1280x800 youll get super boost and still nice picture.

Also, tablet is reporting much less overheating and dimming display raport. Its just by one click. Perfect. One click- back in Fullhd.

No crash, no hangups, restarts etc.

Totally reccomand for much fps increase ,less battery drain and less heat.

No problems with system buttons , no other problems.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
In my opinion, we shouldn't have to do this. This is lenovos fault and should pay for it

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] szczesny:
I dont get what you mean? What fault ? And what i shouldnt do :confused:
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
The lag at all. It has a good processor.

Good spec, bad software

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] szczesny:
You dont get it what it really serve. Its not Lenovo fault. Its fault of Android as a system. It lacks basic options . Changing res in ~ pc hardware is very, very old standard.

These tablets are 8 inch and 1920 res is used in poverfull Pcs and most PS4 games.

Xbox One in most case dont work in FullHD, becoise devs conserwe processing pover. It is simply not poverfull enough to handle FullHD with same details as in PS4. ( it have one class worse graphics card ).

Now, these are consoles that work on giant 32-50 inch screens. Compare it to S8 8' . Its ridiculous that you MUST play Fullhd games with hardware that isnt comperable to real gaming machines.

Android saddly dont have basic options for choosing resolution, and i show that changing res is super easy on S8, you can bring back native res in ome click.

Its giant performamce gain and less heat prob. Its naturall to not stress this device in FullHD gaming. Its capable of Fulljd and it works great, but it is pushed to the limots.

And less heat raports, less battery drain, much more fps on screen = + .

You need root for this and small app. Thats all. It works like a charm.

Not to mention subkect is even in Xda and all users of all kimd of devices are very happywith changing res.

Author of prog says It can make some devices bootloop, but in my case there isnt any signs of bad working. Its perfect. Zero hangups.

Its just making perfect something that isnt perfect. Sorry, but FullHD in gaming is overstressing this tablet in games. Its like putting highest rpms for engine in car.

FullHD gaming is reserved for typical gaming Pcs , not 8 inch gaming capable device.

I l ow it have plenty of pover, but just try 1280 x 800 ( which os standard fpr bidget tabs ) and see how much less heat, battery drain and additional fps.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
My phone handles 2K gaming fine, even my old Note 3 handle FullHD gaming good so why can't the S8 handle it?? Maybe because it is taking the full advantage of the 64bit processor? I don't know

Sent from my Lenovo Tab S8 (S8-50F)
[Android Q&A, Help & Troubleshooting] szczesny:
I dodnt say it dont handle. In some cases it may have difficulties.

What for your phone serve 2k? Nothing too much important . Its too small to see differance and your phone is draining battery, produces more heat.

S8 also works in max detail in Wot Blitz. Becouse its poverfull. But it produce much heat and battery drain in the favour of ultra sharp pixels. And

Simple answer- if Xbox One cant handle FullHD, so why phones are pushing it? Xbox One is real gaming console of new generation and works woth 32-50' screens . Not silly 8'.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
2k is very noticeable at 5.7 in my eye. A big difference from my note 3. It does serve stuff, anyway I'm leaving this debate. Message me if you want to continue ?

Sent from my Lenovo Tab S8 (S8-50F)
[Android Q&A, Help & Troubleshooting] szczesny:
No i dont. Its very damanded option and in Xda there is also special thread about it. All ultra happy with that possibility.

All users now play games that their phones could not process smooth enough.
[Android Q&A, Help & Troubleshooting] panosfx:
How did you change your screen resolution?

Στάλθηκε από το Lenovo TAB S8-50F μου χρησιμοποιώντας Tapatalk
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
In terminal.

su

wm size 800x1200

wm density 189

And reboot :)

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] szczesny:
Very simple. Root + " NOMone resolution " from Play store.

If you want perfect fit setup that works on all screen try typing width : 800 height : 1280 dpi : 200.

It seems wrong in , like diversed XY axles , but if type normal than screen scale totally wrong and you get just small scrren in the middle leaving giant black area of unused screen on both sides. Also dpi seems affect fit of screen.

No worries , even than if you not accept screen return to native in couple of seconds. And tablets works even in those badly scaled modes.

But setup what is up is perfect fit 1280x800 , dpi200 . just icons are giant. Becouse changing dpi from 200 starts to cut down screen usable area , leaving black unused area.

I didnt messed much with combinations yet, but that up is perfect working , like you had native 1280x800. And games are getting Huge boost in fps.

For example, it is usable in Alpha state game - Experiment Z. Its open world , giant sandbox with players online. Quite amazing copy of DayZ from Pc.

Now in 1280x800 i can run it smooth with highest detail and game still looks cool. Just less sharp. And game is demanding , as authors put big hardware requirments warning before instalation.

For 2 days i played couple of great games and its total perfection. Not one crash or error. Even if i change res when games running. All accepted.

Just not restarting tablet without backing default native res. One click and its instant native 1920x.

Also virtual buttons are perfectely scaled and work same way.

Its great option. It give instant fps boost , less heat emission, less overheating raports and less battery drain.

There are some warnings from author of that prog. But many progs that mess with root have some.

For me works perfect, zero problems.
[Android Q&A, Help & Troubleshooting] machcity:
instructions to install lollipop

So I have followed the instructions from first page to up kitkat. I see there is a lollipop twrp backup but how do I use it? Anyone have some step by steps?
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
You download the twrp backup for your device. Copy the folder into the twrp back up folder and restore backup

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] machcity:
Thanks for the reply. Ok, so I'm going to root (according to instructions on 1st page) , then use the Temp CWM Session to restore.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
I flashed twrp then used that to root

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] machcity:
I can't figure it out. Anyone have clear step by steps.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Use S8Unlocker, make sure your on lollipop.

Then go back into bootloader menu then fastboot flash recovery RECOVERY.IMG

I can't link much at the moment

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] machcity:
i'm actually trying to get it updated to lollipop. that's what I'm having problems with. I can flash the original official rom. But can't figure out how to update to lollipop.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Then update it via the update app on the tablet

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] machcity:
It won't update ota. Has problems downloading the file or the update errors out. Seems to be a problem with this tablet, lots of other users having same issue. The Lenovo pc smart app does not work either.
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
There should be a way somewhere but not sure how

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Vikas.cool:
I am using S8 50 LC LTE model on kitkat. I did not updated it by reading L5.0 bad reviews. Its become very slow and apps started getting crashed now a days. I am using it from last one year and now problem occuring very frequently. Please help if i need to root this and update to L5.0 or mashmallow.

Thanks.
[Android Q&A, Help & Troubleshooting] alator21:
root problem

i got tablet s8-50 and i recently updated to lollipop.I tried the above and it had no use for me.(maybe its the lollipop?)Any ideas?

sorry for my bad english.Thanks in advance!
[Android Q&A, Help & Troubleshooting] Minto107:
It's good to do some cleaning after that amount of time :D even high end phones like S6 needs to be cleaned after a quarter ;) update to lollipop only if you're interested in installing upcoming LP/MM ROMs ;)

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[Android Q&A, Help & Troubleshooting] Vikas.cool:
How sd i clean this ? Any app or s/w ?
[Android Q&A, Help & Troubleshooting] Minto107:
Do a factory reset via recovery. It will wipe all user data from device

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[Android Q&A, Help & Troubleshooting] Minto107:
Impossible...

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Impossible

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] panosfx:
Even with only wifi model kitkat,xposed,removed bloatware,xposed + greenify+amplify,and low brightness and besides the modem...Battery sucks!

I don't know what else can i do.

2-3 h screentime when i'm playing games.

Browsing is better but general this tablet's stamina is a problem..
[Android Q&A, Help & Troubleshooting] Minto107:
Playing games... This is an answer. This tablet uses very high resolution textures which drains battery fast. If you stop playing games and start watching YT you'll be able to reach 5+hrs and when reading about 8hrs. Yesterday I got 8hrs 32mins on lollipop. But if you want to play games lower your resolution. There is tutorial on last page or so

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[Android Q&A, Help & Troubleshooting] panosfx:
Yes you're right...

Anyway there's way to have multiwindow on kitkat?

Στάλθηκε από το Lenovo TAB S8-50F μου χρησιμοποιώντας Tapatalk
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
For resolution.

Two ways.

Via Computer (Non rooted)

Via Terminal (Rooted)

Computer, Enable ADB debugging.

ADB shell

wm size 800x1280

wm density (choose a DPI number)

Terminal

SU

wm size 800x1280

wm density (choose a DPI number)

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
There is also third way through that app that szczesny mentioned before ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
True that but they can use unnecessary permission which are not needed and/or abuse their root power.[emoji14]

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
Just tried it. Not Worth it. Getting back on FHD

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
I know right[emoji14]But people have preferences

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] panosfx:
I tried to low the resolution with the apk from playstore but my keyboard was huge.So i was not able to type.

I think i live with FHD.That's why bought this tablet.

Any idea for multiwindow?

Στάλθηκε από το SM-G920F μου
[Android Q&A, Help & Troubleshooting] JustPlayingHard:
It's because of the DPI that's why it was huge xD

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
So far no multiwidowns. Probably u use SwiftKey. You need to also change DPI via build.prop

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[Android Q&A, Help & Troubleshooting] Ahmad77888:
hi. I need the official ROM for 50LC and it seems that all ROM links are down. can anybody help me with that?
[Android Q&A, Help & Troubleshooting] mac231us:
The kk is up... Just have to wait if down.. There is no LL only OTA

https://www.androidfilehost.com/?fid=95916177934524250

From OP
[Android Q&A, Help & Troubleshooting] Minto107:
Not that bad[emoji14]

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[Android Q&A, Help & Troubleshooting] itasoulas:
How much does your battery drain per hour when idle and with wifi or data on? That's the important part!
[Android Q&A, Help & Troubleshooting] Minto107:
I turn it off when I don't use it. So far I haven't found a fix for idle battery drain

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[Android Q&A, Help & Troubleshooting] elendiir:
Hi

have you tried to clear the cache and dalvik cache within a temporary CWM-session. This solved my standby-battery-problem. My tab looses rough 5% a day when not using it.

Cheers

Elendiir
[Android Q&A, Help & Troubleshooting] Minto107:
I have perm recovery so I will try it

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[Android Q&A, Help & Troubleshooting] elendiir:
Sorry double post
[Android Q&A, Help & Troubleshooting] itasoulas:
Brightness Fluctuation/ Screen Dim Issue Fix

Tested with no problems or crashes or bootloops both on KK and L.... just freeze or delete "com.intel.security.service"... and thank me a lot!!!! :p

I also freezed com.intel.themal without having issues. But the first is actually the one that fixes the problem. I had this issue when I was watching videos via embedded players on web sites through chrome or when I was watching a live stream through any web browser. Note anymore!
[Android Q&A, Help & Troubleshooting] Minto107:
Be careful with thermal. It manages CPU so disabling it may cause your device to overheat even more ;)

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[Android Q&A, Help & Troubleshooting] Hash.H:
Any luck with Windows port to this tablet ? I was thinking that we could take the windows yoga tab 2 rom and flash it since they have the same exact specs. We could also extract the bios. The Tab s8 was intended to be a windows tablet in case u didn't know, but that idea was scrapped.
[Android Q&A, Help & Troubleshooting] Minto107:
Create bootable SD Card and set booting mode to Windows 8.x but I don't know if anyone succeed that so far but it's possible if Yoga 2 can

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Windows 10 might be good but there wouldn't be enough internal for it so either install on SD card and be slow or get Ubuntu working

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
It would be fast and you just need 32GB class 10 SD card ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Why not a 128GB? XD

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] TommyDN:
Still does it for me.
[Android Q&A, Help & Troubleshooting] Minto107:
Our tablet supports only up to 64GB cards ;)

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
Damn xD.

64GB SD card with an OTG cable to an external HDD xD

Sent from my Galaxy S6 Edge Plus (G928F)
[Android Q&A, Help & Troubleshooting] Minto107:
Do you want to play GTA 5 on it? XD

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[Android Q&A, Help & Troubleshooting] JustPlayingHard:
I'll give it a go xD maybe a bit of Minecraft, a bit of Wolfenstien (Sorry if I offend anyone)

Sent from my Galaxy S6 Edge Plus (G928F)