Lenovo tab m8

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bullets4all

Member
Feb 13, 2015
10
0
I own a Lenovo Tab M8 4G tablet but I can't connect it to the car's navigation through Android Auto. I use a quality USB cable because Android Auto works on other phones and tablets. Help!!
 

axelmasok

Senior Member
Dec 11, 2011
68
29
I picked up an M8 for cheap used TB-8505F and was successful in fastboot flashing lineage-18.1-20220616-UNOFFICIAL-arm64_bvS.img. The whole process was straight forward. Unlocked Bootloader, OEM unlock. I did follow the guide in this thread to root the stock ROM. I wanted something degoogled so went straight for the lineagos GSI ROM. Seems fine to use.

What I don't get is PFF-SU. I thought after flashing and installing the PFF Superuser APK I was all good. Not really. That SuperSu app is old and not usable. . Weirdly with Magisk APP installed it can manage requests for su despite complaining that there is another su binary that isn't Magisk.
 
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Stanisława

Member
Aug 8, 2022
9
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Hi Dear Users Please Give me Support. I have Device Lenovo TAB M8 HD 8505x.

With Android version 10. He urgently needs to unlock the bootlader. Take the lead. take your steps.
 

Stanisława

Member
Aug 8, 2022
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I ask you very cordially for your support.please help me. Need to know how to enter the IMEI number and serial number on the Chinese website to unlock bootladera ? Despite entering this data, I still have a message about the content that I was trying too much.
 

Stanisława

Member
Aug 8, 2022
9
0
Gives a link to the Chinese page where there is such an opportunity to unlock bootlader in Lenovo tablet.
 

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Stanisława

Member
Aug 8, 2022
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Please Give me Support.

A better alternative is to use Linux; I did it completely on Linux Mint. If you're on Linux, you can use your distribution's package manager (apt in this case, since Mint is Debian-based, use sudo apt-get install adb and sudo apt-get install fastboot to download tools from verified repositories.

Then go to the Lenovo tablet and download Magisk Manager. Here is the link to it along with the downloads and information. I recommend reading it. GH's official link is https://topjohnwu.github.io/Magisk/

IF YOU DO A "NO PHONE HOME GOOGLE" CHALLENGE, WHERE YOU WANT TO KEEP YOUR LENOVO OFFLINE ALL THE ROOT PROCESS, YOU CAN INSTALL ANY apk THROUGH YOUR COMPUTER, USING THE ADB-D INSTALL COMMAND (see the dk_p-name install guide. fastboot and adb posted in appendix)

NOTE ABOUT SP FLASH: There is another way to root devices such as the one with MediaTek (MTK) chipsets with the SP Flash utility. Here's a link to it if you need to, but we won't use this method as it's mainly useful when you can't unlock / enter fastboot, which is not the case with the Lenovo M8. https://spflashtool.com/ Also, to use this tool, you need the standard ROM and scatter file for your device.
 

ep312

Member
Aug 12, 2022
5
0
Wow the AndyYan Lineage rom linked runs better than the old Lenovo 9 or the newer 10 roms, and is actually Android 11!

Installation was much simpler than it sounded like it would be by reading the notes here. As simple as unlocking the bootloader, going through the root steps, and flashing the AndyYan rom (I used lineage-18.1-20220616-UNOFFICIAL-arm64_bvS.img.xz) from the link posted with fastboot just flashing the system partition with the lineage rom.

Thanks everyone for the guidance here!
 

ep312

Member
Aug 12, 2022
5
0
I have noticed one hiccup with the AndyYan rom, and that is that the internal speaker isn't disabled when headphones are plugged in. I'm looking for a software tweak to disable the internal speaker but no luck so far.
 

Heeni

Senior Member

ep312

Member
Aug 12, 2022
5
0
You should be able to turn the speakers off when plugging in headphones by using the settings here: https://github.com/phhusson/treble_experimentations/issues/1774#issuecomment-849040229
Thanks for the reply and guidance - I tried different combinations of enabling/disabling the first two settings in the Phh menu earlier with no luck, and the addition of the third (Force-disable A2DP offload) unfortunately didn't change the behavior either.

I'll keep looking around for solutions and will post back here if I find one, and if anyone has some ideas please let me know!
 

axelmasok

Senior Member
Dec 11, 2011
68
29
Thanks for the reply and guidance - I tried different combinations of enabling/disabling the first two settings in the Phh menu earlier with no luck, and the addition of the third (Force-disable A2DP offload) unfortunately didn't change the behavior either.

I'll keep looking around for solutions and will post back here if I find one, and if anyone has some ideas please let me know!

I'm in the same boat here with the same version. Headphones don't disable the speakers. Tried all combinations without any luck. Not bothering me too much.

What does bother me is every time I tilt the tablet it wakes the screen from sleep. Tried turning off all the wake options. Turn off auto rotate. No hope so far.
 

ep312

Member
Aug 12, 2022
5
0
I'm in the same boat here with the same version. Headphones don't disable the speakers. Tried all combinations without any luck. Not bothering me too much.

What does bother me is every time I tilt the tablet it wakes the screen from sleep. Tried turning off all the wake options. Turn off auto rotate. No hope so far.
Thanks @axelmasok - I've been trying to resolve by creating an overlay, but got errors when applying to the device. I commented about it here: https://forum.xda-developers.com/t/...e-for-your-phone.3878974/page-3#post-87287175 but haven't received a response yet.
 

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  • 2
    I managed to root it for now, using magisk_manager.apk and a boot.img, I extracted from a file named "TB-8505F_S100133_200316_BMP.zip" (which is the latest firmware for the M8-8085F)
    am unable to find any TWRP for the device.
    but at least: got root now.
    2
    D
    Deleted member 1890170
    Hello,
    I recently purchased the Lenovo tab m8 to replace the outdated navigation system in my car. I thought that since it came with a dock station that I would be able to connect the otg cable on the micro USB port. However this does not work, if it’s charging on the dock and I connect the OTG it stops charging. Does anyone know how I can die both things simultaneously?
    Look here: https://www.instructables.com/id/DIY-Cable-to-Use-OTG-and-Simultaneously-Charge-the/
    2
    Just a heads-up - I've booted both LOS 17 (Android 10) and 18 (Android 11) GSIs on my M8 FHD. It's just a matter of flashing vbmeta to disable verity/verification, then flashing system in fastboot - rather easy and painless. While GSIs aren't device-specific ROMs, for niche devices like ours it's the next best thing - though it won't run smooth due to our low-end SoC. Feel free to try out other GSIs as well.
    Screenshot_20210119-214855_Settings.png
    2
    Thanks friend, I installed your TWRP port - works great.
    I finally figured out how to port a TWRP for this device.
    This is for the Lenovo tab M8 FHD TB-8705F running the following version TB_8705F_S300022_201015_BMP
    Please find the file attached here.
    To make this work you will need to flash the vbmeta.img with the option --disable-verification. Some say you need the vbmeta.img to be an empty image file I'm attaching such a file here as well.

    Use this at your own peril.

    If you would like to try your hand at porting it yourself I used This guide. It was very helpful.

    Tried your TWRP and got stuck in a boot loop. Then realized I was on the 8505f not the 8705f heh. Ill get an 8505f image up here in a moment. Good effort btw.
    2
    Hi,
    managed to unlock the bootloader on TB-8505X by connecting it to an apple mac instead of W7. Worked via ADB and fastboot, without need to install USB drivers manually.

    What would be the next advisable step(s) to take in order to achieve root?
    I had a look @ the TWRP site, but there was no TWRP recovery offered for the TB8505F/X.

    Any thoughts appreciated. Cheers!

    1. Go to Lenovo site and download Rescue and smart assistant. Install and run.
    2. On the rescue tab you can download the firmware for your tab (it needs to be connected to the PC).
    3. Goto where you downloaded the firmware. In the RomFiles folder find the boot.img file. copy it to your device.
    4. Install Magisk Manager on your device. Run and select install. select the option to patch a file and select the boot.img file you copied to your device.
    5. markdown the location that magisk shows where it saved the patched file. Copy this file back to your PC.
    6. Flash the file to your device with fastboot flash boot <patched file location>
    7. reboot your device and run again magisk manager this should install the magisk zip file and you are rooted.