yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] jazzespresso:
nandroid backup would help [MENTION=6563151]kandalph[/MENTION], just remove your data.ext4.xxx files, and re-zip them and upload to google drive.

I will download it and modify it, and re-created nandroid.md5 file for him, so that he can flash it thru using Temp CWM Session by [MENTION=4821597]social-design-concepts[/MENTION], which seems like plays much better than one posted from Russian forum.

anyway, if you can upload it, that would be nice...
[Android Q&A, Help & Troubleshooting] kandalph:
[MENTION=4758472]jazzespresso[/MENTION]

this is great. TY

[MENTION=4264286]Maheshwara[/MENTION]

Battery life is a mess.... YESS. And I do NOT accept any positive feedback, that customers are happy with 4-5 runtime. Using sim drops it dramatically to 3hrs..... I am still waiting for a holy change of the battery-management. Come on programmers..... this is not up-to-date!!

Fully charging my device takes 3hrs max (<10% capacity). Charging in KitKat says 100%full. But when you shut don the device and leave it plugged in, battery icon will come up and the charging process will continue. I found out, that I only can do a full charge when OS is shut down. It only will load 90% in KitKat but saying full!!

I also have a Medion Lifetab S8312 with similar features and properties. Except the CPU which is a Arm 8-core.

Same battery capacity, same display, same same same.... and! same company. Medion is Lenovo ;)) (same poor support)

...but looooots of runtime and performance. Anyway.... I think you have to check the Yoga 2 out.

I am looking forward to receiving the stock firmware and getting my problem solved.

Thank you all
[Android Q&A, Help & Troubleshooting] kandalph:
Any news??

[MENTION=4758472]jazzespresso[/MENTION]
[MENTION=4264286]Maheshwara[/MENTION]

I am very exited..... for the result...

I hope that it is not too much to do for you!!

Thank you
[Android Q&A, Help & Troubleshooting] kandalph:
flashing causes no network, IMEI change and more.....

So.... this thing is causing me lots of headache.

Again! after flashing, reflashing, hours, days and nights of reading..... I am getting mad!! Additional the SIM is not seen, no network, the IMEI changed....wtf

I deleted everything. No bootloader, nothing worked.

Turning this f.. thing off. Pressing power & volume + & - will show ''FastBoot Starting....'' on the screen.

Hung it on PC and and ran Phone flash tool. I could flash it again.... to S8-50LC or F. But with different IMEI (I have touched nor changed on IMEI), no network access, even after changing region/country code.

I tried to push the old IMEI....no way...at least for me.

This Lenovo device is a piece of sh.... Never suffered that much with a electronic scrab like that.

Pics follow...

http://xdaforums.com/picture.php?albumid=12158&pictureid=49087

http://xdaforums.com/picture.php?albumid=12158&pictureid=49088

http://xdaforums.com/picture.php?albumid=12158&pictureid=49089
[Android Q&A, Help & Troubleshooting] Maheshwara:
I have had same issue with "FastBoot starting..." when trying to flash it with Phone Flash Tool. Flash did not start at all remaining to 0%. After having stopped flash and reboot, I could see this message on screen and nothing else happened. I had to press power button very long to shut it down completely. I was not able to normally reboot it before doing this. Maybe this will help you...

If I want to flash it with Phone Flash Tool: Is it enough to press Power + Volume down or do I have to do anything else in this menu where I get to by pressing this key combination? I wonder why I have not still been able to start flashing...
[Android Q&A, Help & Troubleshooting] kandalph:
This works in deed.

Important to install the right driver first!!

Start the flash tool as shown in the how-to, tablet not connected

Shut down the tablet

Press power & volume - until vibration comes up, release power and continue pressing volume -

Tablet goes droidboot

connect it and flash tool will show tablet in window.

Select the right flashing file (XML or ZIP)

Press starting flash

and leave it for a while....

Phone flash tool will show that is is finished, but tablet isn't!!!!!

So just wait until it boots, disconnect and voila!!
[Android Q&A, Help & Troubleshooting] aspullite:
New Update Failed

I got a new update today S8-50F_S000359_150506_ROW, unfortunately it will not update on my totally stock 5.0.1 rom. The tablet reboots, begins installation then stops with a 'failed to map file' error. I had problems getting to 5.0.1 after missing the first stage but then Lenovo pushed another update which solved the problem so hopefully they withdraw this OTA and send a different one. It makes you wonder if they actually test the firmware before they push it out!
[Android Q&A, Help & Troubleshooting] Sam00r:
How did you get 5.0.1 on there?
[Android Q&A, Help & Troubleshooting] aspullite:
I got an OTA, there was an initial one which I missed then a second one which would not install because of the missed one. A week or so later I checked the system update again and there was a new one so I installed it (again, totally stock rom) and it was 5.0.1. It's not perfect, the audio is worse through the S8 speakers and there are apps closing randomly, but it is not as bad as I had read. If I can get the new update installed, hopefully it will iron out these few problems.

I looked at the metadata and it show this new update is still 5.0.1 so it must be an update for the problems I have been having, Lenovo dont make it easy though! :)
[Android Q&A, Help & Troubleshooting] kandalph:
IMEI changed, no network access

.......not beeing able to restore it to stock rom is not enough. With all the flashing sessions I've also lost the IMEI. Don't ask me how and why.... I don't know!!

So.... I am able to brick the tablet, to re-activate it, to flash it to S8-50F & LC but not back to a 100% working S8-50L.

But now the (original) IMEI is gone. Instead I've found a total different # on it. Therefore, not SIM can be read, not network access. OMG...

Haven't had any of those problems in the past!!

So, what can I do now??!!

Only FW working at the moment is S8-50F.

I can flash to S8-50LC, but without mobile network access.
[Android Q&A, Help & Troubleshooting] REAL_BALIKA011:
This is why i do a full nand backup when i buy a new device.

You damaged your nv data.

Afaik you can regenerate them, but i can't say anything for sure.
[Android Q&A, Help & Troubleshooting] aspullite:
Failed OTA again

I received another update yesterday but this would also not install saying 'can not create data/ota : file exists' so I factory reset the S8 and tried again and it still will not update, this time saying 'can not create data/ota : permission denied'. This would not be so bad if the update didn't take ages to download, this is becoming very annoying now, how can a company push 2 updates that will not install on a completely stock device?
[Android Q&A, Help & Troubleshooting] jazzespresso:
if you are completely stock untouched unmodified, then I would probably say OTA upgrade somehow currupted or something going on. Keep in mind, having root also causes OTA fail too.

Look for Lenovo Smart Asistant (try here: https://support.lenovo.com/us/en/downloads/ds101291). This is PC version, download it and install it on to your PC, once it is done, connect your tablet. It should recognize your tablet and you should able to upgrade using this official tool. I have not tried this because I am not on pure stock.
[Android Q&A, Help & Troubleshooting] aspullite:
My tablet is totally unmodified, not rooted or anything. I will give the Smart Assistant a try tomorrow, thanks for the info. :)
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Let us know what version of android is in that OTA :)
[Android Q&A, Help & Troubleshooting] aspullite:
I installed the smart assistant and it said that my tablet is up to date even though system update says that an update is available. A different update showed up today but that still wouldn't install 'can not create data/ota : permission denied'. Also, since I factory reset the tablet to try and install the update it now freaks out and restarts randomly when i try to start wifi. I think i might take it back to the shop for the second time and let them sort it.
[Android Q&A, Help & Troubleshooting] kandalph:
Same problem.....

.......I had the same problem. Showing up two different update #. And one of those damaged my device by installing it.

The last upgrade was OTA to Android 5.01

I sendt it to Lenovo/Medion today. Update policy is an imposition. Lots of users report having the same problem even with non-modfied devices. Also asked for sending a detached backupfile for 'save' restoration!! And Android 4.4.2 not 5.xx

Now, I have to wait for getting it back.

All the best for now
[Android Q&A, Help & Troubleshooting] crazypotato:
Bluetooth Audio

Did any of you able to connect the S8 tablet 4.4.2 to a bluetooth headphone? I can't seem to do it. The audio stays on my tablet ignoring the fact I am connected to the headphone via bluetooth.
[Android Q&A, Help & Troubleshooting] olujicz:
I didn't experience any problems with Bluetooth headset
[Android Q&A, Help & Troubleshooting] aspullite:
Good to know i'm not the only one with problems.

Hope you get yours back quickly! :)
[Android Q&A, Help & Troubleshooting] lecapitan:
The only problem I had with bluetooth was after I removed the Bluetooth Share 4.4.2 application. Bluetooth would no longer turn on or connect.
[Android Q&A, Help & Troubleshooting] Lander00:
Hi guys

I found one, very irritating problem. Why the hell mini-jack output is so quiet? I have listening to music from my old LG L9 1 gen since 1,5 year. And on LG max volume level gives louder output than on Lenovo tablet. Can somebody would like to help me with this issue? Dolby digital is turned off.

Appreciate any help.

Lander00
[Android Q&A, Help & Troubleshooting] haerwu:
Did someone got it working for S8-50F?
[Android Q&A, Help & Troubleshooting] jazzespresso:
Increasing Headset Volume

*** Disclaimer:

Following is dangerous operation, so be warned, make sure you can able to know how to use adb command and know how push the file to system folder in case of bootloop.

Editing this file may cause you to bootloop if you do it wrong, so make sure you backup your AudioConfigurableDomains.xml to your desktop PC beforehand.

Install Terminal Emulator from Play store, and open it and give superSU persmission (type su and hit enter, it will prompt you supersu permission, grant that)

Why do I need it? well, when, in case of bootloop, you do adb push file to system folder, you will be relying on adb shell, thus Terminal Emulator on your tablet, so it needs supersu permission so that it will

place your backup file back to \system\etc\parameter-framework\Settings\Audio\.

*** Instruction Increasing Headset Volume on Lenovo Tab S8-50:

Needless to say, your tablet should be already Rooted! You will also need Notepad++ (download it, it is much better than Windows's notepad)

Copy this file from your tablet

\system\etc\parameter-framework\Settings\Audio\AudioConfigurableDomains.xml to your desktop PC.

Open AudioConfigurableDomains.xml file with Notepad++, and find these lines;

<Configuration Name="Multimedia.Headset">

<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/SPEAKER/ANALOG/VOLUME/0/LEVEL">

<IntegerParameter Name="LEVEL">31</IntegerParameter>

</ConfigurableElement>

<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/SPEAKER/ANALOG/VOLUME/1/LEVEL">

<IntegerParameter Name="LEVEL">31</IntegerParameter>

</ConfigurableElement>

<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/HEADPHONE/ANALOG/VOLUME/0/LEVEL">

<IntegerParameter Name="LEVEL">31</IntegerParameter>

</ConfigurableElement>

<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/HEADPHONE/ANALOG/VOLUME/1/LEVEL">

<IntegerParameter Name="LEVEL">31</IntegerParameter>

</ConfigurableElement>

</Configuration>

You see highlighted in RED above, ANALOG/VOLUME/0/LEVEL means left speaker, and ANALOG/VOLUME/1/LEVEL is right speaker, both volume level set to 31 as default.

You should also notice that one two set is for OUTPUT/SPEAKER and other two set is for OUTPUT/HEADPHONE/

Now, you just need to bump a little, say 32/or 33 on both side. I don't know what's the upper limit, but heard it is max 39, which is not recommended at all (may damage your tablet).

Once you made change, save the file, and copy it over to your tablet's \system\etc\parameter-framework\Settings\Audio\ folder, and give file permission 644 using Root FIle Explorer, and reboot your tablet.

this should increase headset volume.
[Android Q&A, Help & Troubleshooting] Lander00:
Thanks [MENTION=4758472]jazzespresso[/MENTION] for information, I'll check it out. However I encountered problem with restoring backup via cwm. I had made backup yesterday and today I tried to restore it to check if it's working. But It's not. After checking MD5 sums, it goes to restore system and then error shows up:

E:format_voume failed to unmount "/system"

Error while formatting /system!

I have L version from Poland but I have installed LC version. Could somebody help me with solving this problem?
[Android Q&A, Help & Troubleshooting] jazzespresso:
OK what CWM version used

did you use;

Custom Recovery installing Temp CWM Session (method 2) one (on first page) to make nandroid-backup?

i need to know what kind of cwm backup you have and trying to flash..
[Android Q&A, Help & Troubleshooting] Lander00:
I used this guide:

I don't know if it's matters but I had made backup on external storage (sd card).
[Android Q&A, Help & Troubleshooting] jazzespresso:
Custom Recovery installing Temp CWM Session (method 2) seems work much better success (depens on device type).

now, you are trying to restore your cwm backup because of some issue?

upload your cwm backup to google drive or somewhere I can able to download?

you do NOT need to include data.* files....

let me know when you upload it so I can download and check it out for you...
[Android Q&A, Help & Troubleshooting] Lander00:
I tried to check if backup is working (in case I screw up something)

I'll check second method. I can upload it on wednesday (thanks to my slow internet...). I'll PM You after uploading.
[Android Q&A, Help & Troubleshooting] jazzespresso:
that would be fine, just PM me when you upload it...
[Android Q&A, Help & Troubleshooting] Lander00:
Checked using second method and it seems that everything works like a charm. Backup made and restored with no problem.

Thanks for help.

Edit: About too quiet headphones. Followed your advice and now is louder.

BIG thx :)
[Android Q&A, Help & Troubleshooting] jazzespresso:
Very good news indeed...so using second method's CWM thus using [MENTION=4821597]social-design-concepts[/MENTION] 's CWM version, you were successfully able to restore your tablet with CWM nandroid backup without any issue, correct?

just need you to double confirm with you, so that I will delete CWM method 1 permanently, avoid the confusing...

p.s: I still like to have your backup, since you mentioned it is L version, and it is hard to find full firmware of that version...so I can post it here in case someone asks for it..

About work around headphones; stay around 32/or 33 range...don't make it higher it may damage your tablet....mine set to 32 which loud enough, but not crazy loud :p
[Android Q&A, Help & Troubleshooting] Lander00:
About L version - I hadn't made backup, but instantly after I bought I installed LC version :(

About CWM - Yes, I used second method. Backup made with CWM and then I restored backup with CWM with no problems. Everything works corretly.
[Android Q&A, Help & Troubleshooting] kandalph:
Not really working!!

The fact is that flashing back from 'LC' or 'F' to the genuine 'L' via CWM is NOT working. This is what I learned!! Droidboot still sees the device as LC though Android as 'L'! Therefor any update will fail!

The only way to flash it successfully in Droidboot AND Android is using intel's Phone Flash Tool.

I did it many times with 'F' and 'LC' firmware. Works great. But as I said: there is no stock rom at the moment for the 'L' device to do this.

CWM restores ONLY Android, NOT Droidboot! So we need to find a flashable 'L' version with XML like Jazzespresso posted (as 'F', 'LC'). And with intels Phone Flash Tool we will be able to do a FULL restore/flash!!

I am waiting for my device from Lenovo. Will be a cpl of weeks..... At least no stress at the moment.

All the best for now
[Android Q&A, Help & Troubleshooting] stas333:
a few days i started noticing battery issues with my S8-50F. First, while charging, sometimes I get unsupported current (or something very similar), then charging it to 100% is not possible. The battery stays at 99% and continues to charge. Once I unplug the charging cable, the battery goes to 100%. Then I noticed that battery drains very fast, i get maybe 3 hrs SOT. Lastly, the battery would go to 1% and stay there for 45 minutes while the screen is lit. Just flashed it all to stock, maybe that will help. If not, then ill be sending it for repairs since its still under warranty. has anyone else had anything similar?

Thanks
[Android Q&A, Help & Troubleshooting] cieslakpawel1:
I copied the AudioConfigurableDomains.xml to another folder in the tablet and it's visible in my Lenovo. However I can't see it on my PC (to cut and paste it in mnotepad++). I opened emulator , gave su which was granted but can't find the file. Any help appreciated :)
[Android Q&A, Help & Troubleshooting] jazzespresso:
I am not sure what you meant by that. In my tablet which is Tab S8-50 WiFi only model, it is located under \system\etc\parameter-framework\Settings\Audio\ folder

To access this location, you need to use root explorer or solid explorer, plus you should be rooted to access system root folder.
[Android Q&A, Help & Troubleshooting] jazzespresso:
kandalph, we are talking two diffrent things here, and I am aware of your issue. What I asked [MENTION=4325493]Lander00[/MENTION] is if you can make nandroid full backup using CWM method 2 and then able to restore it back the way it was.

Per my test, I have Tab S8-50F (wifi), so I used CWM method 2 and did full backup nandroid, and then reboot my tablet and deleted one of the app (to see if it was going to be restored), and then back to CWM, and find my backup nandroid, and restored it. It restored fine, and plus I saw deleted app back again, so this kinda proof restore does work, but again everyone has different outcome.

Unfortunately, we don't have offical firmware lenovo S8-50L version, closest thing we could get if someone who owns Lenovo S8-50L version, make nandroid full backup using CWM method 2 and give us, so that we can modify it and make it work with CWM restore.... that's only work around I can think of.
[Android Q&A, Help & Troubleshooting] jazzespresso:
Every time I hook up my tablet to my PC, it sometimes tells some "current charger unsupported", not always I got this message. I am using official lenovo USB cable charger, so no idea.

I am not experiencing fast battery drains, so not sure what's the issue with yours.

when it is charged 100%, leave it overnight without connecting the charger, and check in the morning, see what's the batter level (normal should be 95-90%). It is important that your tablet goes into deepsleep, there's no CPU wake up or anything. If you see that your tablet 70-80% in the morning when you pick your tablet, that should tell you that there's some background process or apps causing your tablet to wake up from deepsleep.

This tablet does not have great battery life, it is really moderate, and if you play games, it drains battery quite fast, blame it Intel chip inside which is not optimized with KitKat, but heard lollipop upgrade greatly improves battery life, I guess they (lenovo) realized it and did some improvement on it.

I am not jumping Lollipop upgrade on my S8-50F yet even if I got update, I cancel it out because there's no root method for Lollipop for this device yet, and I like my tablets to be rooted :p

so improve to batter life on this tablet, I use combination of Wakelock Detector [Root] (check it out play store) and Greenify (Root and Xposed). Wakelock Detector [Root] shows you nicely what apps or process causing wake up CPU or other stuff or what drains battery, once you know, click on it, it will give you Greenify option, click on it, it will take you Greenify app, and there you can Greenify the app. Anyway, this helps improve battery usage, at least you can get an hour or more usage than normal batter life.
[Android Q&A, Help & Troubleshooting] cieslakpawel1:
saying both side do you mean two lines with speaker and headphone or just the red ones with headphone? sorry to bother but I don't want to make a mistake and spoil something ;)
[Android Q&A, Help & Troubleshooting] jazzespresso:
headphone's right and left...logically you need to change both to be equal sound go to your left and righ ear :D
[Android Q&A, Help & Troubleshooting] haerwu:
Update, root, set 280 dpi?
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Can someone explain how the heck did notebook check (http://www.notebookcheck.net/Lenovo-Tab-S8-Tablet-Review.135139.0.html), tlbhd (http://www.tlbhd.com/lenovo-tab-s850-review-19498/) get such great battery life? I only get 4 hours of on screen time with a normal usage :confused::rolleyes:

Either they received models with a better optimized battery or most of us got defective batteries :eek:
[Android Q&A, Help & Troubleshooting] kandalph:
Battery is a big problem.....

[MENTION=5828901]RaawrItsTomi[/MENTION] and all others

Yep. Battery runtime can be even shorter!! Browsing with phone module, WIFI not activated, receive around 3,5hrs. Navigation (e.g. sygic) with the device will not exceed 1,5hrs!!!....

I have a Asus Memo Pad FHD 10 (with intel) and this is a great device..... Also the Lifetab S8312 from Lenovo Medion gets a average of 9-10 hrs!!!
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
I mean that's hardly half of the battery life we should be getting lol

Someone should call lenovo regarding this
[Android Q&A, Help & Troubleshooting] Maheshwara:
That's why I changed from S8-50 to Yoga 2
[Android Q&A, Help & Troubleshooting] kandalph:
Welldone

Welldone!
[Android Q&A, Help & Troubleshooting] Lander00:
Original dpi was 240 :)

About battery: I had bought L version then I installed LC version. My battery life is around 4h 40min - 5h 30min (some web, some games, some music, some video). It suits me. Battery capacity isn't big but I accepted that fact. If somebody needs more runtime on battery, then buy other with bigger capacity.
[Android Q&A, Help & Troubleshooting] haerwu:
I know that it was 240. Played with 240, 320 and decided that 280 is perfect for me ;D
[Android Q&A, Help & Troubleshooting] jazzespresso:
S000185_141203_ROW - yes for this, get the update, and root your device if you like, and then modify build.prob to change DPI back to default 240 if you like.
[Android Q&A, Help & Troubleshooting] tonepinballwiz2:
I had 2 tablets and my first tablet had the same firmware as you(S000164_141103_ROW). I thought it was the best firmware that came with dpi 240. But yes, you could update to 141203_ROW and change DPI just as jazzespresso stated. The newer firmware may offer only some minor bug fixes but otherwise nearly identical, so I wouldn't bother.