yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] jazzespresso:
most likely you did something wrong in build prop file....

here's what you can do;

pre-request:

ADB (search in XDA, or Google it, and download adb files on your pc)

Lenovo_TAB_S850_V1.0.1.msi (this is driver installation for your PC (windows), so that it will recognize your device when you put your device in downloading mode

Stock build.prob (make sure you have unmodified stock build.prob file of firmware your device on

first make sure you can put your device in download mode, you should have already installed lenovo drivers for the device....now, when device is on download mode, open command prompt (cmd) where your adb.exe is (step one above), on command prompt type adb devices, it should return device connected message or should list device...once you know adb connected, copy unmodified stock build.prob file where your adb.exe file, and type following adb command one at time;

adb shell --> hit enter key here

su --> hit enter key here

mount -o remount rw /system --> hit enter key here

now, your system partition mounted as writeable, you can now push build.prob using following command;

adb push build.prob /system/

it should send the file to your device, once it is finishes, reboot your tablet and see if it reboots.

Check here for ADB commands

http://www.droidviews.com/push-pull-files-android-using-adb-commands/

hope it helps
[Android Q&A, Help & Troubleshooting] jazzespresso:
I am uploading it ...I will post new link in orginal post (OP) on the first page..
[Android Q&A, Help & Troubleshooting] bigl34461:
Awesome! Thanks one more question..how do I put it in download mode? I probably did it already before. Just didn't realize it
[Android Q&A, Help & Troubleshooting] jazzespresso:
hmmm....I forgot for this one.....hmmm...If I remember correctly, press power +volume up (or volume down) at the same time...wait until you see downloading mode...

check this forum: Flashing Firmware

use Google translate to translate the page.
[Android Q&A, Help & Troubleshooting] mackhenri:
Just got this update.

Sent from my HTC One X+
[Android Q&A, Help & Troubleshooting] jazzespresso:
interesting....can you able to capture upate (.zip) and share with us? so I can post it in the first page in OP post
[Android Q&A, Help & Troubleshooting] samarashi:
wifi problem

Dear Sir

After updating to S8-50LC_S000200_150121_ROW the tab can not find any wifi network.

if i remove the SIM and trun off the wifi and then restart the tab, wifi will go ok ,finding wifi networks and connecting without any problem!but inserting SIM make wifi problem as before.

the tab was not rooted!

is there any solotion!
[Android Q&A, Help & Troubleshooting] Minto107:
Poor battery? Mine is working 5-6 hours on single charge... My old TAB 3 7inch was working same top but it had 7 inch screen and 4000mAh battery! Battery life is good. Battery is too small but it had to be a slim, lightweight tablet, want big battery go for Yoga 2. Mine gets hot only on heavy games like asphalt 8 but not on YT anymore. WiFi issues? I haven't fanced any for now... The only thing you can do is complain on cheap tablet which still offers much, like good screen, amazing smoothness, great performance... You should go for iPad ;) or its too expensive

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] sirxdroid:
I'm just comparing it against the Nexus 7, playing exactly the same games. The N7 is way better when it comes to battery. I think the Intel CPU is a battery hog. I read the same thing about the Asus phones that use Intel CPUs, though I have no experience first hand with them.
[Android Q&A, Help & Troubleshooting] Minto107:
It's my first Intel tablet/phone and I also haven't had too many Snaps. I have Exynos 4 device and it gets hot much more than Intel tablet and as I remember Snapdragon S3(or S4 Play, anyway the dual core version) in my hTc One S was overheating so much even on Sense UI lol perhaps hTc phones are bad :D but I also had One V with Snapdragon S2 and it was great CPU ;) 200% overclock and here I admit no bigger overheats but I never played Asphalt 8 or Real Racing 3 but it was almost 4 years ago lol

Wysłane z mojego SM-N910C przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] jaimbo:
Anyone managed to get a Windows installer booted past that ACPI_BIOS_ERROR bluescreen? I have been messing around but haven't been able to get it working yet.

I would love to stick Windows 10 on this thing!
[Android Q&A, Help & Troubleshooting] TommyDN:
I've tried some options for a couple of days and couldn't get 'Windows 8.1 to go' to boot and also couldn't get the 8.1 and 10 installer to run. I'd love to run Windows on it too :(
[Android Q&A, Help & Troubleshooting] jaimbo:
As per one of the previous posts, I managed to boot Clonezilla, I have tried booting Ubuntu USB made with Rufus with no success. I got this tablet for £9 ex display so I won't be that bothered if I brick it and I would love to see how far we can take this thing!
[Android Q&A, Help & Troubleshooting] TommyDN:
I have got SuperGrub to boot and created a zip to use it too.

Copy the contents of the zip to a fat32 USB drive and make that drive bootable.

I haven't had time to experiment with it alot yet but i have got a Ubuntu ISO to boot with it.
[Android Q&A, Help & Troubleshooting] jaimbo:
Ah awesome. I assume this gets around the whole 32bit UEFI and most bootable installers/live CDs not supporting it?
[Android Q&A, Help & Troubleshooting] TommyDN:
In a sense. I've managed to boot USB's and that have a different filesystem than fat32 but still requires bootia32.efi. I haven't really tested the Linux distros though but they all don't have drivers for whatever exotic touchscreen controller our tablet uses.
[Android Q&A, Help & Troubleshooting] jaimbo:
So far I've not been able to get any OS other than Android booted :(
[Android Q&A, Help & Troubleshooting] Mawis93:
Engineer mode

Hi, i have big problem. I need volume up on headphone, I have ROOT, but in Mobile Uncle Tools I don´t have Enginner Mode (MTK). Please, help me :)
[Android Q&A, Help & Troubleshooting] mackhenri:
Yes, this is not a MTK device. (Intel Atom Z3745)
[Android Q&A, Help & Troubleshooting] Mawis93:
do you need help me with this problem? I need boost my volume in headphone. thx
[Android Q&A, Help & Troubleshooting] mackhenri:
http://xdaforums.com/showthread.php?p=60716183

Mawis93 check the above link post

Sent from my Lenovo TAB S8-50LC
[Android Q&A, Help & Troubleshooting] Mawis93:
This method I tried yesterday, but my tablet had woken up, only Lenovo logo, so I had to install the new firmware. Any other method is not?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
guess we will see. . .
[Android Q&A, Help & Troubleshooting] Sam00r:
Did you manage to work out how you got the windows installer to boot?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Sad but no I think it was a fluke I've had a few of those while playing getting it to boot Linux in android boot mode android in windows 8.x boot mode, I had it once to the windows recovery screen but it blue screened.

We'll see what happens with the new firmware should get 64bit support.
[Android Q&A, Help & Troubleshooting] khanghua:
i guess we will get... nothing
[Android Q&A, Help & Troubleshooting] social-design-concepts:
While it would sure be nice for them to release it today I completely expect that Friday will hear they found another bug and the update has been delayed for an unknown time again.
[Android Q&A, Help & Troubleshooting] social-design-concepts:
It's here download link for the S8-50F : http://tabdl.ota.lenovomm.com/dls/v6/S8-50F_S000456_151016_ROW_WCF3.zip it's still android-5.0.1_r1 : (

Warning:

1. This upgrade will erase some user data.To avoid data loss, back up all data before upgrading.

2. This is an upgrade to the Android 5.0 system.

3. Key updates: Upgraded GMS app Upgraded UI style to blend with native Android design Dual desktop mode Changed theme style

4.It will take about 13 minutes to startup for the first time after upgrade. Please make sure that there is sufficient energy.

5.The storage room will decrease accordingly after upgrade.

6.Please upgrade or uninstall the applications if they are not compatible with the new system after upgrading the system. For better experience with Android 5.0, it is recommended to perform factory data reset.
[Android Q&A, Help & Troubleshooting] KainXSS:
is your recovery blocked with it
[Android Q&A, Help & Troubleshooting] social-design-concepts:
No the tethered recovery still works trigger T4 I actually did the installation through twrp.
[Android Q&A, Help & Troubleshooting] KainXSS:
the build date looks to be October 16 so I guess they were doing some finishing touches on it but 5.0.1 . . . . . . . . . really
[Android Q&A, Help & Troubleshooting] Mikhei777:
I've just got it as official update on my S8-50F using OTA.
[Android Q&A, Help & Troubleshooting] mustyrash:
Anyone know if the old root method is working?
[Android Q&A, Help & Troubleshooting] Minto107:
Very good news! Can't wait to come back home and update my S8 LTE! :D

Wysłane z mojego SM-N910C przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] jamesking420:
No, the executable from the forum that automatically rooted doesn't work. Instead, you get a lot of "permission denied" messages as it runs through its process, and then it resets the device. I have not tried "root method 2" that uses the flash tool.
[Android Q&A, Help & Troubleshooting] social-design-concepts:
It is rootable with the tethered recovery trigger t4 and twrp
[Android Q&A, Help & Troubleshooting] TommyDN:
5.0.1.. not even 5.0.2 or 5.1.. that's a shame. we'll probably need xposed or something to fix the memory leaks and bugs 5.0.1 has.
[Android Q&A, Help & Troubleshooting] khanghua:
do you have link for S8-50LC?

thanks
[Android Q&A, Help & Troubleshooting] 37vincent:
Looks like they removed user account support in this update, I can't find the option anywhere at least [emoji20]

Besides that,the update seems to behave fine so far[emoji3]
[Android Q&A, Help & Troubleshooting] khanghua:
could I use update file of 50F for 50LC?
[Android Q&A, Help & Troubleshooting] haerwu:
No users support? No upgrade then.
[Android Q&A, Help & Troubleshooting] mackhenri:
Yes anyone has got it for LC
[Android Q&A, Help & Troubleshooting] KainXSS:
lollipop is somewhat buggy for now.

also ./efibootmgr -v now returns this for me

root@S8-50F:/data/local/tmp # ./efibootmgr -v
./efibootmgr -v
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,0000
Boot0000
wierd path1e 00 45 00 ..E.
.E.F.I. .H.a.r.d. .D.r.i.v.e........A....................
Boot0001
wierd path30 00 45 00 0.E.
.E.F.I. .I.n.t.e.r.n.a.l. .S.h.e.l.l................................z....@.!U.R.N7
[Android Q&A, Help & Troubleshooting] 37vincent:
Enabling Multi-User support on Lollipop

So, as mentioned there is no multi-user support by default. Turns out there are more tablets from Lenovo that had the same problem with there Lollipop update. Below is a mehod to enable multiple users again in Lollipo, I haven't tested it for long ofcourse but it seems to work. You do, unfortunately, need root/recovery for this and adding user isn't as simple as before.

Root your tablet / boot in to recovery

mount the system read/write (in TWRP go in to mount and select "system")

Run: adb shell

edit build.prop by adding the following lines:

echo "fw.max_users=8" >> /system/build.prop
echo "fw.show_multiuserui=1" >> /system/build.prop

Where 8 is the maximum users that is allowed, change this if needed.

Important: use ">>" this will append the lines to the file; ">" will replace the file with just the line that is echoed.

Now reboot

Now open settings and searching for "user" will give you the desired user menu, however unfortunately you wont be able to add a user from here. To add a user we will have to use adb again:

adb shell pm create-user "Name of user"

There is no root needed for this step.

Switching can be done in the top right corner, where there is an empty space. Clicking it will show all the users. (See attached screenshot)

This is all far from perfect, but atleast now it's possible to use multiple users and once setup the switching is still easily done
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Are you using the 64bit version?
[Android Q&A, Help & Troubleshooting] khanghua:
you have the download link?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
L and LC are not available yet. DATA comes out Friday 10/30 LTE is some time next week.
[Android Q&A, Help & Troubleshooting] KainXSS:
yes that was the problem, have to use 64bit it seems now instead of 32bit

root@S8-50F:/data/local/tmp # ./efibootmgr -n 0001
./efibootmgr -n 0001
BootNext: 0001
BootCurrent: 0000
Timeout: 5 seconds
BootOrder: 0000,0001
Boot0000* EFI Hard Drive
Boot0001* EFI Internal Shell

in bios again now
[Android Q&A, Help & Troubleshooting] social-design-concepts:
We have 64bit firmware now and you can you the vol keys to navigate now too.

No time to play till Friday but now can properly work on an Android 6 port.
[Android Q&A, Help & Troubleshooting] jamesking420:
I've not managed to follow this thread properly, but are you talking about an android 6 port for the lenovo tab s8? I thought we couldn't install custom ROMs?

Thanks for the info and posts on root, I'll be rooting tonight!

James
[Android Q&A, Help & Troubleshooting] Endyamon:
What I need for root ... thank you ..
[Android Q&A, Help & Troubleshooting] social-design-concepts:
It's a work in progress
[Android Q&A, Help & Troubleshooting] jaimbo:
You have a link for the 64bit files?
[Android Q&A, Help & Troubleshooting] Minto107:
**** you Lenovo...

S8-50L still no lollipop... Any1 got the update on LTE variant? If yes can you share it here?

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Patience see the dates for the roll out below :

S8-50F ROW WIFI : 2015.10.27

S8-50L ROW DATA : 2015.10.30

S8-50LC ROW LTE : 2015.11.5

i'll keep checking everyday and will post the direct download links when live.
[Android Q&A, Help & Troubleshooting] Minto107:
Thank you so much for info ;) at least it's known when it's arriving. Have you already installed lollipop? Working even smoother than KitKat? We got 64 bits?

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Haven't to much time to play with it yet but it's 64bit UEFI Firmware, 64bit Kernel but still 32bit Android User Space.
[Android Q&A, Help & Troubleshooting] Minto107:
At least kernel is 64 bits ;)

Wysłane z mojego SM-N910C przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] jamesking420:
I followed the instructions from social-design-concepts in this thread and it appears to have rooted fine. Thanks!

---------- Post added at 05:54 PM ---------- Previous post was at 05:46 PM ----------

I am using your tool and opening an adb shell when I am running recovery on my device. I then go and mount system, and run the command. I get permission denied error:

"/sbin/sh: can't create /system/build.prop: Permission denied".

I guess I haven't mounted OK, but I can't see why not? It's still got a cross next to it when I head back in to the mount menu. I am doing all this in TWRP, I am not exiting back to android to do any of it (FYI, I think that's right!)

Any ideas?

EDIT - Managed to do this in ES File explorer by adding the lines to the end of build.prop after mounting system as r/w. I then used the adb shell from your utility to create a new user. Thanks!

Cheers,

James
[Android Q&A, Help & Troubleshooting] Hash.H:
When ever I turn on the tablet, right under the big white Lenovo logo, I get a message that says Failed USB Boot, and then it goes away and the tablet boots normally. Lollipop seems to run well on this tablet, provided that you reset it after installation to ensure maximum performance. I cant boot back into the BIOS or Setup with F2 anymore. any ideas ? I tried rooting it but that doesn't seem to work. Anyways, now that we have 64 bit UEFI, would windows 10 work on it ? Given that it always gives an error about UEFI. For some reason, Lenovo decided to replace the old radio app with another one with an ugly UI interface and the icons don't look like stock" android 5.0 icons. Guess we have to wait for the guys over at the Russian Lenovo forums to post a automated root .exe program. There are still many bugs that need to be fixed in future minor updates. A port of Marshmallow 6.0 would be nice but hey, we just got the update today, so what's the hurry for ?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
yeah there seems to be a bug either in the tethered launcher or my twrp build i need to investigate it this weekend, twrp gets root permissions but adb shell doesn't.

see above for rooting and read the last few pages about getting back into the setup.
[Android Q&A, Help & Troubleshooting] evolutionisbad:
I'm in the UK and still on the original software. The update that is available is the kit kat update. Do I have to complete that to get lollipop or is it just not available for me yet?
[Android Q&A, Help & Troubleshooting] jamesking420:
I'm in the UK and have been updated from latest kitkat to lollipop
[Android Q&A, Help & Troubleshooting] Hash.H:
Dolby digital

After the update, the Dolby digital equalizer app doesn't seem to function properly with many apps like YouTube and Google Play Music. The sound is horrible ! Anyone else ?
[Android Q&A, Help & Troubleshooting] geogaddi47:
Does the same root method work after the lollipop update?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Haven't tested but I've read of issues with Dolby on Lollipop on other Lenovo devices. Make sure you post the issue on the official Lenovo forum.
[Android Q&A, Help & Troubleshooting] gyb001:
Bootloader unlock

This is REAL_BALIKA011 's job, not mine.

:) :)

https://www.youtube.com/watch?v=TcU1WMpE4aI
[Android Q&A, Help & Troubleshooting] jamesking420:
Cool!!!
[Android Q&A, Help & Troubleshooting] mackhenri:
Who is this guy no steps mentioned on how to do it.
[Android Q&A, Help & Troubleshooting] haerwu:
Does Xposed works for anyone? Flashed v75-x86 and no boot (all modules disabled first). Had to flash xposed-uninstaller to get it back into booting.
[Android Q&A, Help & Troubleshooting] social-design-concepts:
[MENTION=6537820]REAL_BALIKA011[/MENTION] Congratulations I look forward to your write up on booting customs kernel images. Finally the community can work to bring custom ports to this device. Maybe your guide will be of benefit to other Intel android baytrail tablets too. Again great work can't wait to get your instructions and build my own.
[Android Q&A, Help & Troubleshooting] elendiir:
Hi there,

good news to have Lollipop and even better new to see a slight chance for an unlocked bootloader.

Can anybody tell me how to istall the update on a S8-50F with root enable and DPI changed? Do I need to unroot and set the DPI back to default?

The previous small update is still poping up since I have not installed it up to now. Do I need to update my tab before I go to Lollipop? Since I am traveling right now (left the tab at home) I do not know if I get the new Lollipop update or still the older small one offered for download.

Any advice is more than welcome.

Cheers and many greetings from Germany

Elendiir
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
So far all the screenshots had the good DPI... I'm installing it right now i'll let you know! ;)

Edit: Yes you have to install all the previous updates

Edit: apparently you don't need to unroot before installing the final lolipop update
[Android Q&A, Help & Troubleshooting] haerwu:
elendir: restore dpi to 320, apply that 12MB OTA, then apply 1113MB OTA to get Lollipop. No need to unroot.

Next step is rooting again - "trigger 4" works fine.
[Android Q&A, Help & Troubleshooting] Sam00r:
I didn't unroot and it went fine
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
The dpi on lolipop is actually nice (not zoomed in, not too small). Maybe it's exactly the way it was before the first OTA update.

Edit: what is up with dolby? it sounds... weird
[Android Q&A, Help & Troubleshooting] elendiir:
Thanks for the fast answers guys,

I will to upgrade when I am back at home.

Cheers

Elendiir
[Android Q&A, Help & Troubleshooting] Minto107:
I heard it's someway broken right now. May reflash dolby from xda forum? I bet Lenovo will fix it in next OTA but guys you have to spam on lenovo forums about that... It makes things happen faster ;)

S8-50L LTE users: Tomorrow lollipop is being released to us! :D Cant wait to test :D
[Android Q&A, Help & Troubleshooting] luckypatak:
has root after update to lolipop 5.01?can i flash lenovo tab s8-50F with TWRP 2.8.7.0?make an custom clockworkmod or i brick my tablet if i flash it need a root again like on kitkat ---
[Android Q&A, Help & Troubleshooting] Danolg72:
does anyone know how to root the lenovo tab 2a8-50f on Android 5.1?
[Android Q&A, Help & Troubleshooting] social-design-concepts:
Edited :

Sorry you asked about the A8 not the S8
[Android Q&A, Help & Troubleshooting] elendiir:
Hi there,

a short update. I did the following steps (as proposed by you):

reverted back to default DPI (320) with adb shell wm densitiy reset

installation of the small (12 MB) update

installation of the Lollipop update

re-enabling root using a TEMP TWRP session with T4 method (thanks go to social-design-concepts)

Now everything is working fine again. I am thinking of settting the resolution back to 240 dpi.

Cheers

Elendiir
[Android Q&A, Help & Troubleshooting] Minto107:
Why do you revert to 320 DPI? I installed every KitKat update with 240DPI with root without any problem. Also you check out OTA survival option in SuperSU. Sometimes it can work

Wysłane z mojego GT-I9305 przy użyciu Tapatalka

---------- Post added at 07:57 AM ---------- Previous post was at 07:56 AM ----------

Go for A8 threads or if it's Intel BayTrail device follow cwm temporary session and just flash SuperSU binary ;)

Wysłane z mojego GT-I9305 przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] geogaddi47:
Has anyone tried to flash Xposed on the updated lollipop firmware?
[Android Q&A, Help & Troubleshooting] haerwu:
[MENTION=4684973]l_p_4_7[/MENTION] I tried. Does not boot. Not digged especially into why.
[Android Q&A, Help & Troubleshooting] Minto107:
Still waiting :( S8-50L

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] social-design-concepts:
It was 02:30am 10/28/15 UTC Time before the update showed on the S8-50F so it might not show up until the 31st for most people.
[Android Q&A, Help & Troubleshooting] RTouris:
Can anyone else confirm what appears to be the stock camera's app excessive battery drain when the app is launched, user snaps a picture or two, views them and then just leaves the tablet to sleep? Apparently the camera's GPS function never sleeps with the rest of the system, which means that the app needs to be killed off manually (at least this is my experience so far).

Haven't tested other apps that make use of the GPS module (for high accuracy), so I can't really vouch if this is a 'GPS'-code defect or not, if you happen to have any such experience do share..
[Android Q&A, Help & Troubleshooting] philmein:
just tried 240dpi looks bad to me 320dpi seems so much better
[Android Q&A, Help & Troubleshooting] Minto107:
Waiting for it ;) maybe it has Dolby fixed. It would be great :D

Wysłane z mojego GT-I9305 przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] mackhenri:
I have the LC and I've to wait few days more..sucks mann
[Android Q&A, Help & Troubleshooting] Minto107:
But you have real LC or L with firmware changed? Anyway longer you wait you get better firmware ;)

Wysłane z mojego GT-I9305 przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] mackhenri:
Here in India only LC is available I guess..

And this tab was the only non expensive 1080p available when I got it. Samsung was way to expensive and I hate Samsung somehow even tho I've tried a lot to get use to their devices