yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] Minto107:
This is Intel ;) it will teach us new tricks ;)

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] Spitras:
i already tried everything, selecting all these and other drivers, still get error that my device is unauthorized and can't see TWRP backup on my SD card. Don't know what to do next :/
[Android Q&A, Help & Troubleshooting] Shump:
Try switching your driver to this:

Then from the bootloader screen try the tool again.

You may need to figure out away to get around the fact that your device is not authorizing adb calls. I think it means you never enabled debugging on your device.
[Android Q&A, Help & Troubleshooting] Twenga Dev.:
hier what i did: use windows 7!! not 8 or 10
[Android Q&A, Help & Troubleshooting] Minto107:
I used w10 and it worked

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[Android Q&A, Help & Troubleshooting] Minto107:
Guys do you know if Lenovo will update S8-50X any further? I mean next newer android version(eg 5.1/6.0)?

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[Android Q&A, Help & Troubleshooting] TommyDN:
Maybe in 2017 but most likely lollipop was our last update.
[Android Q&A, Help & Troubleshooting] electron.hTcpico:
guys i am totally confused with all this twrp , cwm recovery backups and which is better and which is not

I just want to update to lollipop

i have the LC model but i dont care about the voice calling working on lollipop

current situation of my tablet is

4.4.2 build TABS8-50LC_S00020_150121_ROW

rooted and modified(as in deleted system apps)

no custom recovery

can anyone please list down the steps to update to lollipop from scratch form flashing temp. recovery to downloading the right file to getting lollipop .

please do help

thanks in advance
[Android Q&A, Help & Troubleshooting] basskris:
Hello electronic,

i was in the same situation as you, but with the 50F. I only put my device back to factory settings and used the OTA update. Worked like a charm.

Gesendet von meinem Lenovo TAB S8-50F mit Tapatalk
[Android Q&A, Help & Troubleshooting] cinnamonagouti:
Flash S8-50L to LC with Stock ROM of LC?

Hi I´m from Germany and it seems that there aren´t many owners of this tab. I hope to get help in this forum.

I´ve an S8-50L (LTE) and update it to lollipop, but I´m not really satisfied with lollipop and would go back to Kitkat.

I successfully rooted the tab and did an backup with the temp cwm session. So now my idea is to flash my tab with the stock rom of the LC Version with the way from jazzespresso.

But I´ve read about a member who lost his imei by doing so and he couldn´t get a connection to his provider anymore.

So my questions are :confused::

1) Is it possible to downgrade my tab flashing it with kitkat stock rom of LC version?

2) Could I brick my tab irreversible?

3) If flashing fails, can I go back restoring my backup from lollipop?

Thanx for answers!
[Android Q&A, Help & Troubleshooting] Spitras:
Dont downgrade, i tried it too but soft bricked my tab, others have found ways to get back to lolipip from soft brick but i've been unsucessful so far :/
[Android Q&A, Help & Troubleshooting] busyinny:
Updated my s8-50f to lollipop last night. Have not played too much with it but thus far it does not seem any slower to me than KitKat. I did reset to factory before I updated. Then I ran the bootloader unlocker. It designated success but my recovery is still the stock one. Do I need tonflash twrp manually? Fearful that if it is not fully unlocked I may be bricking my tab. Rooting worked fine and with no other roms out there right now not sure what the unlocked and twrp would offer me, just got upgrade-itis.
[Android Q&A, Help & Troubleshooting] banmeifyouwant:
Ubuntu is in wip state.:angel:

The system boots up, here is the todo list:

Fix boot form nand - done

Fix touchscreen

Fix wifi

Rotation based on sensor

Make an easy-to-use installer

Other issues...
[Android Q&A, Help & Troubleshooting] Minto107:
Okay but do we need Ubuntu? ;) I think its better idea to get CM12.1/13 than Ubuntu. It's unuseful for most users here unless u want to build a ROM on tablet???

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---------- Post added at 05:20 PM ---------- Previous post was at 05:19 PM ----------

Of course u need to flash recovery manually

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---------- Post added at 05:23 PM ---------- Previous post was at 05:20 PM ----------

Downupgrade is possible, but u need stock KitKat bootloader file(from full ROM) and you can go back on Yoga 2 forums there's a guide how to get back to KitKat. It unfortunately works only on F and LC version. I have L and I don't want to get on LC.

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[Android Q&A, Help & Troubleshooting] mac231us:
Yes...just for that reason I may go back to KK...maddening the touch sensitivity or lack thereof ..or inconsistency of sensitivity

otherwise LC version running fine with LL (there is always something)
[Android Q&A, Help & Troubleshooting] Minto107:
For me it again works like it worked on KitKat. Yesterday was much worse.

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] mac231us:
how did you get back to KK....everything was fine (made backups after root, then decided to flash the xposed zip and it would just sit on Lenovo logo..then tried to factory reset that did not work.again stuck in lenovo and android screen..) so tried to get to droidboot to flash KK but can only get to fastboot mode or stock recovery (which is useless imo as of now)

I have the LC KK full flash firmware

any advice? thanks

am in screen which says in red rectangle at top options (which you can toggle through using volume down) like restart bootloader, recovery, power off, reboot

below the android picture it says fastboot mode in red

will try to post picture
[Android Q&A, Help & Troubleshooting] Minto107:
I didn't go back to KK because I'm on L variant. I'll post a link to tutorial to show LC/F users how to do that

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[Android Q&A, Help & Troubleshooting] mac231us:
one one of the Lenovo forums there was some post on an update this month for LL (think it may have been the L of F version not LC)...after the xposed loop was trying to get to unroot to see any LL ota update was available (not sure if TWRP temp would prevent that) to see if any improvements (if LC LL update was available, that is)
[Android Q&A, Help & Troubleshooting] Minto107:
U can't install Xposed because we have x86-64 ROM

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[Android Q&A, Help & Troubleshooting] mac231us:
unless there is some adb fastboot command and file I can use...main thing is droidboot does not come up

thanks will look for your link
[Android Q&A, Help & Troubleshooting] Minto107:
After Xposed you can only reflash lollipop stock firmware(which is not published) or flash backup from TWRP/CWM

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---------- Post added at 07:56 PM ---------- Previous post was at 07:54 PM ----------

But u should be able to get to temp recovery

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[Android Q&A, Help & Troubleshooting] mac231us:
there is an xposed framework (correction) for x86..looks Like i messed up about 32 versus 64bit..thing is I did not even have it activated just flashed zip...nothing was activated ddid not even have installer apk installed..but it just would sit in a bootloop (seems as it was just on Lenovo android screen)

---------- Post added at 01:58 PM ---------- Previous post was at 01:56 PM ----------

how to get to temp recovery...can you flash that when in say fastboot or even if when off?

tried twrp temp installaiton only when it was booted (worked)

EDIT

Got back to twrp flashed it while in fastboot! thanks! now at least can get back to the LL backup
[Android Q&A, Help & Troubleshooting] Minto107:
You're welcome ;) if you will have any questions just [MENTION=2111323]MENTION[/MENTION] me ;)

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[Android Q&A, Help & Troubleshooting] mac231us:
thanks I will...will be great if you find the link to the KK reversion tutorial..in the meantime will do some searching myself.
[Android Q&A, Help & Troubleshooting] Minto107:
If you want to do research by yourself remember to look for Yoga 2 because S8 is not popular at all ;)

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---------- Post added at 08:49 PM ---------- Previous post was at 08:29 PM ----------

On Friday I'll try to make my own tool to revert bootloader back to KitKat ;)

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[Android Q&A, Help & Troubleshooting] TommyDN:
I prefer Ubuntu (Touch) over Android anyday.
[Android Q&A, Help & Troubleshooting] mac231us:
wow...if you get that tool working that will be awesome!

I went over several forums and threads...bios restore tool is needed and it is specific apparently to the board. Had I known (should have researched more-recall some message showing LL was working fine on the LC versions (not the others)) I would not have upgraded to LL. Touchscreen issue is only issue (and a major one..what is the tablet/smartphone without a proper touchscreen..lol...anyway not my main device so will see)

I unrooted to see if there are any updates (not sure if that is enough as may have repartitioned)...it came back saying I have the latest version (though like said earlier either the F or the L version has some recent November OTA on the LL itself)

I have the full LC 4.4 firmware TABS8-50LC_LTE_VOICE_ROW_WW14_S000200_150121 (at the time of being on KK I had not rooted so do not even have TWRP backup for it)
[Android Q&A, Help & Troubleshooting] Minto107:
It's good that you have full backup, I may ask for some files if I will need some ;)

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] cinnamonagouti:
bootloop S8-50L lollipop after cwm restore

Hello, need help!!!:crying:

Successfully rooted my S8-50L with method from socialconcept with trigger T4. Then made two cwm backups with the temp cwm recovery session. Now I´ve made a restore of the backups, but my tab doesn´t boot. It only shows the lenovo sign for a short time then goes into recovery mode. Boot to bootloader is also possible. I tried several times with both backups - they always say "successfully finished", but no boot! The temp cwm session works great and i also tried deleting caches and data - no change. Always bootloop! What can I do now???

Thanks
[Android Q&A, Help & Troubleshooting] Minto107:
If it goes to recovery shortly after splash logo it means that system partition is broken, try to do /system wipe and then try flashing backup again

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[Android Q&A, Help & Troubleshooting] mac231us:
Need help...Boot failed, EFI hard drive upon failed bios repair flash

Hello Social Design Concepts/Anyone else

Some time back it appears you helped smogan1 out with an issue ""Boot Failed. EFI Hard Drive". Same when I try to boot recovery. Even Fastboot Modes does not work." (quoted text from his message)

I am having the same issue. I was trying to downgrade from LL to KK and was doing the bios repair (using lenovo forums procedure outlined for rollback for s8-50lc which is what I have) and the flash failed around 66-70%. I should have stopped there and tried again and this time through another usb port and it just sat there for 15 mins doing nothing..I then disconnected and so I have this issue now. I did the 3 power (guessed it is holding power, up and down vol all at same time and then release power yes? as I did not see any description what that actually is) and did the fastboot flash boot droidboot.img but it just does "fastboot starting" and nothing else. I have TWRP backups of LL (not of KK) so no issue with that. Could you help me out? Thanks!

EDIT when I do fastboot flash boot droidboot.img (droidboot.img taken from the LL ROM)

On the PC I get just like smogan was getting

skipping other lines etc..at the end of the progress info I get

writing 'boot'

FAILED (remote: unknown command)

and on the tablet I see fastboot starting but it does not do anything else

(maybe should have just waited for minto107 etc to come up with a tool for this messy procedure-actually simple but the flash is always a tossup)

thanks...or if anyone else can help here
[Android Q&A, Help & Troubleshooting] Minto107:
So you still can't boot? If so that's a big shame, I will try to help you figure it out

Wysłane z mojego Lenovo TAB S8-50L przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] mackhenri:
I have the LC variant, should it work or it work require extra modules or something.
[Android Q&A, Help & Troubleshooting] jazzespresso:
I am afraid, this won't work on LC variant..but maybe near future....for now what I have is first custom ROM for this device and no idea how it will work out...now my entire attention is able to successfully flash the JazzROM_Lenovo_TABS8-50F_v1.0 without any error...once this out the way, then maybe able to come up another one for LC version (no promise though)...

now if I only I can get back my tabs8-50 tablet from my wife....can't believe she left her pathetic iPad at home and took this tablet on her business trip...
[Android Q&A, Help & Troubleshooting] icanttinkofaname:
Is it possible to port the multi window app to stock ROM? Have you tried jazz?
[Android Q&A, Help & Troubleshooting] mackhenri:
Just a quick question, what is the best resolution for our tab. For now I find 300 dpi good
[Android Q&A, Help & Troubleshooting] jazzespresso:
Original, out of box, default DPI set for this 240, then Lenovo pushed two other small/medium size updates and changed it to 320 dpi.

it is really matter of personal choose what dpi you like to use, but heard that neither 320 or 300 plays nice with some apps (some scrolable areas disappear, etc), I can't really confirm that since I triend neither DPI settings.

I am just sticking with default 240 DPI, no matter what Lenovo thinks or other thinks...
[Android Q&A, Help & Troubleshooting] jazzespresso:
I tried (used lenovo yogo tablet pro's) and failed terribly :crying:

multiwindow settings and codes are in Lenovo Yogo tablet pro's settings.apk (based on what I saw after I decompiled), and when I check this tabs8-50f''s settings.apk after decomplied, none of multiwindow codes there (i was hoping there and only need to 'enable'), so means a lot of codes needs to carried over from Yogo Tablet Pro's setting app to tabs8-50f's settings.apk, and recompile.....and this is a lot of work and not easy..

I might come back to this once of these times when I have a lot of free time to kill :D
[Android Q&A, Help & Troubleshooting] NoSeeUms:
noobie

OK I followed all the instructions, installed the drivers ran phone flash tool and started the flash. On the flash tool it gets to 28% then comes up with an error cannot execute/find fastboot.exe in orange text. After about two minutes it fails I am a noob to all of this anyone have any ideas? I am sure its something simple and yes I have went to the Intel folder and fastboot.exe is there. I am rooted BTW I just want to get my tablet back to normal so I can do updates and what not. Any ideas would help thanks guys.
[Android Q&A, Help & Troubleshooting] kmem:
Jazzespresso: Thanks for your pioneering work on the TABS8-50. Is there a somewhere we can read about your rom? The only info I have seen is in post #100 of this thread. I'm interested but I haven't seen any feedback or user experiences. I'd like to know a bit more... Such as, which lenovo update you used as a base, what is included, how it differs from stock, what works and what doesn't, etc.

I am still running the original firmware. I quite like the smaller text and I've not felt too adventurous, especially after reading reports that the latest update patched the exploit used to gain root.

I may be out of line in suggesting this... but perhaps a new thread is in order? IMHO I doubt your rom is likely to get the exposure it deserves buried within this thread.

I really expected this seemingly-capable device to gain more interest by now but sadly things are looking a bit grim.
[Android Q&A, Help & Troubleshooting] stas333:
great thread. useful, but the only thing I would add is a link to the specific adb drivers that are need to get the auto-root to work. I found them in the manual root method in the adb folder.
[Android Q&A, Help & Troubleshooting] stas333:
Does anyone know how i can increase the speaker volume? Seems like the media files are missing in the etc folder.

Thanks
[Android Q&A, Help & Troubleshooting] KainXSS:
I would not recommend boosting the volume on the speaker since it will probably damage them but if you want to try to anyway.

some of the audio configuration files are in system\etc\parameter-framework

the file you want to edit here to boost the volume is system\etc\parameter-framework\Settings\Audio\AudioConfigurableDomains.xml

open it in an text editor and look for

<Configuration Name="[B][I][U]Multimedia.IHF[/U][/I][/B]">
<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/SPEAKER/ANALOG/VOLUME/0/LEVEL">
<IntegerParameter Name="LEVEL">39</IntegerParameter>
</ConfigurableElement>
<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/SPEAKER/ANALOG/VOLUME/1/LEVEL">
<IntegerParameter Name="LEVEL">39</IntegerParameter>
</ConfigurableElement>
<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/DIGITAL/VOLUME/DAC1">
<IntegerParameter Name="DAC1">148 148</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>
<Configuration Name="[B][U][I]Multimedia.Headset[/I][/U][/B]">
<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/DIGITAL/VOLUME/DAC1">
<IntegerParameter Name="DAC1">148 148</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>

everything under Multimedia.IHF is for the devices speaker(besides headphone)

everything under Multimedia.Headset if for the audio jack(besides speaker)

theres 2 ways here to boost the volume here but analog volume is maxed already(max is 39) for the speaker so the only way is to try to boost the dac volume for the device speaker

<ConfigurableElement Path="/Audio/REALTEK/SOUND_CARD/OUTPUT/DIGITAL/VOLUME/DAC1">
<IntegerParameter Name="DAC1">[B][U]148 148[/U][/B]</IntegerParameter>

boost 148 148 to what you want, the maximum is 175, there are two values of 148 because the first is for the left and the other is the right channel

editing this file sometimes causes bootloops just to let you know so If you want to try to boost it this way backup in CWM first(edit it incorrectly and it will bootloop your device).

the mic settings are also in this file if you want to edit them.
[Android Q&A, Help & Troubleshooting] jazzespresso:
I have custom ROM already done (build using android kitchen), but problem I am having now is CWM flashing the ROM fails. Even if we have temp CWM (as outlined in first post in this thread), that method does not flashes ROM for some reason... I just need to ping [MENTION=1485619]tigr72[/MENTION] from Lenovo-forums.ru and see if he can help us out..I also know that [MENTION=3576981]KainXSS[/MENTION] will be looking into as well (I share the ROM with him too)

because of these reasons, I did not officially posted the ROM download link. Once we are able to iron out these issues, perhaps we may open a separate ROM thread for this tablet..
[Android Q&A, Help & Troubleshooting] The Finn:
Thanks

Registered today to express my thanks. You helped me solve a big problem for me--I bought here in China a Chinese model of the S8-50. At the time I didn't realize that it meant that google play was disabled in the firmware, shutting me out of a lot of apps.

But thanks to your great post and clear instructions I was able to load the rest of world firmware and now have the tablet that I originally thought I was buying!

Kudos to you, thanks so much for all your efforts!
[Android Q&A, Help & Troubleshooting] jazzespresso:
glad that it helped you out....
[Android Q&A, Help & Troubleshooting] kmem:
Thanks for clarifying! I look forward to any progress you guys make.
[Android Q&A, Help & Troubleshooting] romdroid.:
Hi guys. Can we unlock the bootloader on this tablet and install roms? I am wondering because I saw this tablet quite cheap and would love to see some dev support before purchasing
[Android Q&A, Help & Troubleshooting] jazzespresso:
there's no known way to unlock the bootloader, actually most of intel x86 devices have the same issue...and I agree that there's not a lot development support goes with this tablet, it is because it is not wildly popular device, so not many developers have it or have interest working on it...

however, the specs of this tablet and price is quite good and it won't be a bad purchase. At least you get root and then manually remove junk lenovo apps, and then install xposed and nova launcher, you pretty much rocking...only drawbacks is no custom ROM...
[Android Q&A, Help & Troubleshooting] Famf9983:
Hey guys I got one of these that has a cracked screen and was wondering if there was any way to repair it. It doesn't register any touch input so I was wondering if the digitizer needs to be replaced or if I could just replace the glass.

Failing that, would there be any way for me to control the tablet remotely to get at least some kind of use out of it?
[Android Q&A, Help & Troubleshooting] Spitras:
Good guide, everything worked flawlessly, now have rooted tablet :) Just one question, maybe someone knows how to remove that annoying camera focus/shutter sound ? tried downloading couple of camera apps but can't rid of it :( maybe there is a way to delete these sound files from system folder or something like that? :D
[Android Q&A, Help & Troubleshooting] NoSeeUms:
Sigh

No one have any ideas for my problem? I've tried everything still can't seem to flash the stock rom gets to 28% and stops, saying it can't execute fastboot.exe on the flash phone program. I've googled anything that would have to do with fastboot.exe but nothing of value came up. I'm to the point now of giving up I just want to get my tablet back to the way it was. Is there any other programs I could use to flash the rom to the tablet? Or have any ideas on why I'm getting this error. I'm running on the s8-50f and have went over all the instructions to a T. I am rooted and have installed all the drivers and the tablet is reconized by the pc. If you need anymore information let me know.