Lenovo TAB S8-50 - Stock Firmware ROM/Root and Support
- Thread starter jazzespresso
- Start date
I flashed this on my tab, and the TWRP recovery was gone. I can't root the thing trying all the methods mentioned in the first post (including your tethered CMW tool). How do I root it, or should I downgrade it back to 442 and work all the way up? Thank you.
Edit: Solved it. The tool does not work with Win 10. That's all.
Last edited:
Are you kidding me? You're quoting a post from over 5 years ago. This tablet development is dead, just like this tablet itself. Get a new one already
No. This tablet is dead, if you want windows on it either develop ACPI drivers or buy Surface Go
Hi there, I know this is an old thread. But maybe after quite a time, TWRP can be installed permanently as a custom recovery on this tablet?
Sadly, this link and the download link in the first post of this thread are dead.Here is link for S8 unlocker
https://drive.google.com/file/d/0B1rqpiMcpORZSGRhR09HTmNpcVE/view?usp=sharing
---------- Post added at 06:33 PM ---------- Previous post was at 06:33 PM ----------
@banmeifyouwant
The googledrive-link from Miinto107 isn't available for download, cause google says, the "S8unlocker.exe" is virus infected. That's why you cannot download it.
@Minto107 Please reupload it somewhere else. Thank you.
Enter UEFI, connect flash drive and install it.Linux install
Hello.
I'm trying install ubuntu for the tab.
I copied the ubuntu installer from the data partition, with adb. Partition type is vfat.
I run the installer grub from efi-shell. i'ts running fine, i can setting up localization, keyboard...
But it doesn't found the install media. The tablet detect the partition to ram. /dev/ram1,2...15 I'm trying mount it unsuccessfully.
I try load the driver, but it isn't help
Unfortunately the installer has minimal bash with busybox
Someone have idea how i mount the partition? Now the google isn't my friend.
hello everybody!
can anyone please post the s8_unlocker tool?
I know this thread has been dead for a while now but i need to unlock bootloader and all links are dead.
all help appreciated
@balika011 @Minto107 @social-design-concepts @jazzespresso
can anyone please post the s8_unlocker tool?
I know this thread has been dead for a while now but i need to unlock bootloader and all links are dead.
all help appreciated
@balika011 @Minto107 @social-design-concepts @jazzespresso
hello dear, recently I planned to install Linux on my tab too, do you remember its process by any chance? would you mind if do a favour to me and guide me a little bit? I'll appreciate thatLinux install
Hello.
I'm trying install ubuntu for the tab.
I copied the ubuntu installer from the data partition, with adb. Partition type is vfat.
I run the installer grub from efi-shell. i'ts running fine, i can setting up localization, keyboard...
But it doesn't found the install media. The tablet detect the partition to ram. /dev/ram1,2...15 I'm trying mount it unsuccessfully.
I try load the driver, but it isn't help
Unfortunately the installer has minimal bash with busybox
Someone have idea how i mount the partition? Now the google isn't my friend.
❣
hey dude, as I remember when downgraded it, you don't need to unlock it like new phones, you just can do whatever you want. or at least mine didn't need tohello everybody!
can anyone please post the s8_unlocker tool?
I know this thread has been dead for a while now but i need to unlock bootloader and all links are dead.
all help appreciated
@balika011 @Minto107 @social-design-concepts @jazzespresso
it's an android based device! doesn't have a boot loader or bios manager like PCs
it's working on fastboot and adb
how can I install Linux on it?
I'm digging google to only find a way how to do it
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64Lenovo TAB S8-50 - Stock Firmware ROM/Root/emp CWM Session, and Support
Hi All,
I have hard time to figure out since there's no dedicated thread for this tablet. I know you can find couple of posts related to this tablet here in XDA, but again I like all the info for this tablet in one page
My idea here is put all together here in XDA forum, can't promise you that this will be ultimate guide for this tablet, but at least this may help you get started.
By the way; there are 3 models of the TAB S8-50:
Lenovo Official Stock Firmwares
Root Methods
Installing Temp CWM Session
How to flash stock firmware
Additional Info
P.s: The last firmware upgrade (build 141203) that Lenovo pushed changes tablet's default DPI 240 to 320. If you happened to get upgrade before root, re-root it and then modify build.prop's to ro.sf.lcd_density=240. The 240 is tablet native default DPI. There's no word when Lenovo officially fix this, see official lenovo user forum below:
http://forums.lenovo.com/t5/Other-Android-based-Tablets/Re-Tab-s8-50-Latest-update-changes-resolution/td-p/1825209
Update: 01-28-2015 11:06 AM
Here's one of the stupidest respond from Lenovo Tech Support about their screwed up DPI - this simply tells you that they will keep 320 DPI for any new upcoming updates. Now, why they do this!?, we don't know nor they are giving any technical explanation, but we all know that original native DPI of this tablet is 240.
Increasing Headset Volume
Increasing Headset Volume
A few of you complain about how low the headset volume, to increase it a bit, see the instruction here in this post;
Increasing Headset Volume Mode by me
Additional Lenovo Apps
Using Xposed Framework
Help/Support/Troubleshoot
If you find this thread helpful, please click THANKS button
.
.14Accessing the Lenovo TAB S8-50 UEFI Setup
Accessing the Lenovo TAB S8-50 UEFI Setup :
You will need the following in order to access and navigate the uefi setup :
- USB OTG Cable
- Powered USB Hub
note : I tried 4 powered usb hubs and 2 usb-otg cables before finding a pair that work. - efibootmgr binary here : View attachment efibootmgr.zip
note : I did not port efibootmgr simply complied it from source found here.
- Step 1. Extract the View attachment efibootmgr.zip somewhere on you computer and push efibootmgr32 to /data/local/tmp/
Code:adb push efibootmgr32 /data/local/tmp/efibootmgr - Step 2. start an adb shell and navigate to /data/local/tmp
Code:adb shell shell@S8-50F:/ $ cd /data/local/tmp - Step 3. as root change permission of efibootmgr
Code:shell@S8-50F:/data/local/tmp $ su root@S8-50F:/data/local/tmp # chmod 6755 efibootmgr - Step 4. using efibootmgr
Code:root@S8-50F:/data/local/tmp # ./efibootmgr -? ./efibootmgr: invalid option -- ? efibootmgr version unknown (fix Makefile!) usage: efibootmgr [options] -a | --active sets bootnum active -A | --inactive sets bootnum inactive -b | --bootnum XXXX modify BootXXXX (hex) -B | --delete-bootnum delete bootnum (hex) -c | --create create new variable bootnum and add to bootorder -D | --delete-by-label delete ALL boot entries with the same label -d | --disk disk (defaults to /dev/sda) containing loader -e | --edd [1|3|-1] force EDD 1.0 or 3.0 creation variables, or guess -E | --device num EDD 1.0 device number (defaults to 0x80) -g | --gpt force disk with invalid PMBR to be treated as GPT -H | --acpi_hid XXXX set the ACPI HID (used with -i) -i | --iface name create a netboot entry for the named interface -l | --loader name (defaults to \elilo.efi) -L | --label label Boot manager display label (defaults to "Linux") -n | --bootnext XXXX set BootNext to XXXX (hex) -N | --delete-bootnext delete BootNext -o | --bootorder XXXX,YYYY,ZZZZ,... explicitly set BootOrder (hex) -O | --delete-bootorder delete BootOrder -p | --part part (defaults to 1) containing loader -q | --quiet be quiet | --test filename don't write to NVRAM, write to filename. -t | --timeout seconds set boot manager timeout waiting for user input. -T | --delete-timeout delete Timeout. -u | --unicode | --UCS-2 pass extra args as UCS-2 (default is ASCII) -U | --acpi_uid XXXX set the ACPI UID (used with -i) -v | --verbose print additional information -V | --version return version and exit -w | --write-signature write unique sig to MBR if needed -@ | --append-binary-args file append extra args from file (use "-" for stdin)Code:root@S8-50F:/data/local/tmp # ./efibootmgr -v BootCurrent: 0000 Timeout: 10 seconds BootOrder: 0000,0001 Boot0000* EFI Hard Drive ACPI(a0341d0,0)PCI(17,0)Controller(0) Boot0001* EFI Internal Shell MM(b,fff68000,fff97fff) - Step 5. set next boot option / power off tablet
note : originally i used efibootmgr -n 0002 for setup but after accessing the setup menu this this boot option was no longer available ?
not sure what happened but maybe someone would be nice enough to post the output of efibootmgr -v for me.
Code:root@S8-50F:/data/local/tmp # ./efibootmgr -n 0001 BootNext: 0001 BootCurrent: 0000 Timeout: 10 seconds BootOrder: 0000,0001 Boot0000* EFI Hard Drive Boot0001* EFI Internal ShellCode:root@S8-50F:/data/local/tmp # reboot -p - Step 6. Connect USB OTG cable , powered USB Hub, and keyboard to the tablet and power on.
- Step 7. Exit the EFI Shell by typing exit then hit Enter
- Step 8. Scroll down to Device Manager then hit Enter - Hit Enter again to select System Setup
- Step 9. Scroll down to boot and hit Enter
- Step 10. We need to disable UEFI Fastboot in order to be able to access the setup and boot manager directly from the keyboard.
Scroll down to fastboot and hit Enter arrow up and select disable and the press Enter the hit F4 to save changes.
- Step 11. Hit Esc to return to the Main Setup Menu, Scroll down to Commit Changes the hit Enter, Hit Enter to confirm changes and the device will reboot.
You can now access the UEFI Setup by hitting F2 when powering the tablet on, or you can access the boot manger by pressing F7
In order to boot a traditional Linux distribution or Windows you need to change the OS Selection from Android to Windows 8.x tne the Boot Setup in the UEFI Setup menu.
These instructions are awful.12My custom kernel now in stable stage.
Fully working, but the camera.
I'm looking forward to someone's camera fix.:angel:
(It's time to start CM12.1 or CM13 development!)12Downgrade from LP 5.0 to KK 4.4
Hello,
Since some of you been asking for full translation and files uploaded from Russian Lenovo forums, here it is.
This is not my guide, original site: lenovo-forums.ru
Thanks for VVizard for this guide. Im not responsible for any damage to your equipment. You need to understand what you're doing.
Latest Phone Flash tool version here
Downgrading procedure:
1. Download stock firmware for your tablet. Either it is F, L or LC variants for Phone Flash Tool. This should be original, unmodified stock firmware, not TWRP backup or something.
2. Download the archive TABS8-50_Otkat.rar. Extract this rar to original firmware folder. You need to copy and replace existing files. (Suggestion: You might want to have 2 copies of original firmware, one unmodified, another with this rar extracted, just in case of course)
3. Run Phone Flash Tool
4. Browse -> open the file from the firmware (step 2) -> pft_flash_lte_normal.xml (Dont mind if it says lte, if your tablet is F and you downloaded F firmware it will flash F)
5. Turn off your tablet
6. Enter Fastboot mode. Volume down (-) and power button.
7. Plug tablet to PC, it should be detected by Phone Flash Tool.
8. Click Flash
9. If Phone Flash Tool shows FINISHED - in any way do not disconnect from a computer! Tablet still continues flashing on its own.
10. After couple of restarts tablet should boot as normal.
11. Finished. You can use your tablet with KK firmware now.
12. Don't forget to set Region Code
How to install 5.0 Again:
Via OTA updates all over again, from version S000143
The recovery of the tablet
Perhaps you once wanted to downgrade from 5.0 to 4.4 - and now the tablet doesn't work, error like Boot failed: EFI Hard drive and tablet load Bios but does not start. A little instruction.
1. Downlaod repair_Bios.rar and unzip it to the root of any drive.
2. Run Phone Flash Tool (version 5.2.4)
3. Browse -> open the file from the archive -> flash.xml
4. Turn off the tablet
5. Hold volume buttons (both) and the power button. The tablet should go into Fastboot Starting...
6. Plug tablet to PC, Phone Flash Tool should detect it (Some issues have been reported when plugging into front USB ports, USE ONLY BACK USB PORTS)
7. Click Flash
- Since my tablet is S8-50F, after repair_Bios.rar in droidboot it was determined as S8-50LC. Don't worry, after a full flash everything will fall into place everywhere and will be determined correctly.
- During the firmware repair_Bios.rar long "does nothing". Do not worry, just wait.
9. Use Downgrading procedure to get back to stock KK firmware.
10. Read all instructions carefully
11. Flash a manual roll back from LP 5.0 to KK 4.4.
After 8th paragraph do not turn off Tablet, let it stay in Fastboot Mode until you figure out how to downgrade!
I Hope it will be useful to someone as it was for me.
PS. After downgraded to KK i updated to LP via OTA again. LP build is terrible, even Youtube is lagging after clean installation, everything is buggy, im thinking going back to KK until lenovo releases more OTA's or someone manages to build CM for it12I'll do my best we will see if it will succeed
Wysłane z mojego GT-I9305 przy użyciu Tapatalka
