yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] Stanisława:
Dear Users Please View Image.

Please / Very Please HELP Me.
[Android Q&A, Help & Troubleshooting] ep312:
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!
[Android Q&A, Help & Troubleshooting] ep312:
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.
[Android Q&A, Help & Troubleshooting] Heeni:
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
[Android Q&A, Help & Troubleshooting] ep312:
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!
[Android Q&A, Help & Troubleshooting] axelmasok:
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.
[Android Q&A, Help & Troubleshooting] ep312:
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://xdaforums.com/t/guide-how-t...e-for-your-phone.3878974/page-3#post-87287175 but haven't received a response yet.
[Android Q&A, Help & Troubleshooting] axelmasok:
No response in that thread still I see. Wish you all the luck!
[Android Q&A, Help & Troubleshooting] mrz80:
ARRRGH Uh help? I botched a root attempt on my Tab M8 HD 8505F and now I'm in bootloop hell. I found a working TWRP and installed it, and it comes up reliably. I can get into fastboot mode as well. I have a linux machine. I do not at present have access to a Windows machine, the Rescue utility from Lenovo cannot see the tablet from inside a WIn10 Virtualbox VM, and the Rescue utility won't install and run under WINE. I've tried using fastboot to redo the vbmeta and a stock boot.img; still stuck in the bootloop. Any notions of how to proceed?
[Android Q&A, Help & Troubleshooting] Veyso:
Hi Is there any custom made rom for Lenovo TB-8505FS Tablet? and how do i install without pc
[Android Q&A, Help & Troubleshooting] Heeni:
Did you make any progress with this? If not, and I assume that you don't mind losing everything on the tablet, you could try following the steps in this post: https://xdaforums.com/t/recovery-tb...x-for-lenovo-tab-m10-hd.4211221/post-84671085 It's for a different Lenovo tablet, but it might be of some use. By the look of things, you don't have a great deal to lose. :(

If you can convert your Virtualbox VM to QEMU/KVM, you should be able to see the tablet from the VM, though there's a bit of fiddling involved to get it to behave. When I did this, I found that Windows wanted to re-register Windows, which might or might not be a nuisance depending on which edition of Windows you have.
[Android Q&A, Help & Troubleshooting] mrz80:
I was up at my brother's last week and was able to use his Windows machine to d/l the Lenovo Rescue utility and restored the tablet to functionality. Since I needed it for music and maps on the trip home I didn't bother trying to root it again yet. :D
[Android Q&A, Help & Troubleshooting] ComfySofa:
Hi - just picked one of these up...tried using magisk to patch the boot.img which while does work puts me into a boot loop....managed to get twrp on there which is very hit or miss (more miss) trying to get into it....ive read theres a lineage image for it but cant locate it (one link is a dead end)

Has anyone else had any luck with a custom rom?

Cheers to anyone that replies.
[Android Q&A, Help & Troubleshooting] Heeni:
There doesn't appear to be a custom ROM specifically for this tablet, but I was able to install a GSI (AndyYan's LineageOS version 18.1 https://xdaforums.com/t/discontinued-gsi-11-lineageos-18-x-gsi-all-archs.4205461/) I gave the tablet away to family, so I can't do any further tests, but I can't see any reason why version 19.1 shouldn't work. I have the X505F, which has similar specs but a larger screen, and that works fine.

I had no luck with TWRP, and ended up using fastboot to install. See post https://xdaforums.com/t/lenovo-tab-m8.4049539/post-87565025 in this thread, if you want to play with that option.
[Android Q&A, Help & Troubleshooting] ComfySofa:
Wow - brilliant - thanks very much....as i say i did manage (purely by luck i think) to get into twrp....ive not managed to successfully boot from a magisk flashed boot.img (i get a boot loop) if i were to get into twrp again can i just flash the lineage rom or do i need that boot.img working first.

I wasnt expecting a reply but thats brilliant...again. Many thanks.

Oh - which version do i need from the list??
[Android Q&A, Help & Troubleshooting] Heeni:
The version of Lineage I used was bvS, that is, a/b with built-in su and no GApps. I had no luck with Magisk, either, and as I don't need any of the modules, I'm quite happy with su. Therefore, I just used the unpatched boot.img. The flashing was all done via fastboot on a PC. If I remember rightly (and it is nearly a year since I did all this), the TWRP version doesn't have an option for flashing to system, which limits its usefulness.
[Android Q&A, Help & Troubleshooting] ComfySofa:
Hi just to update a little for anyone else thats doing this...i found this post on reddit...

https://www.reddit.com/r/androidroot/comments/l6qasc

As id already done some of mine ive now got mine rooted....thanks to the above post... ive got Twrp working as well which is great - all i need now is to get the right version/file of lineage to flash. Again - many thanks.
[Android Q&A, Help & Troubleshooting] Heeni:
That sounds very interesting. Thanks for digging it up. If I end up with another of these tablets, I can refer to it.
[Android Q&A, Help & Troubleshooting] ComfySofa:
Managed to get Lineage on there but getting loads of errors....while its flashing the image in twrp its giving invalid argument errors - is there a way of flashing it manually... im almost there!!
[Android Q&A, Help & Troubleshooting] Heeni:
You could try flashing the LineageOS GSI with

fastboot flash system [name of GSI].img

I do this quite often on the X505F as well, even though it has a functioning TWRP (and Magisk) installed. If you see an error message containing the phrase "header magic" (or something similar), ignore it.
[Android Q&A, Help & Troubleshooting] ComfySofa:
Hi there...ive posted a link down below on hoe to stop this....you have to reflash the vbmeta with a switch to stop this.
[Android Q&A, Help & Troubleshooting] ComfySofa:
Brilliant - so which version of TWRP did you use....i found a link on the net to a version which was supposed to work but clearly didnt...
[Android Q&A, Help & Troubleshooting] Heeni:
For the M8, I used the TWRP image that's in post #63 of this thread. I was able to boot into it, but it had no option for installing system images. Which is the reason why I used fastboot instead. In the end, I went with the official Lenovo recovery. And I don't remember at this stage if I specifically reinstalled it, or if it just overwrote TWRP by itself when I rebooted. (I've kept some notes, but obviously didn't cover everything.)
[Android Q&A, Help & Troubleshooting] ComfySofa:
Tried 2 different images from the site you suggested....one 19 on 20 neither boot from an adb flash command - they just sit there at the animated screen (unless ive picked the wrong ones of course!)
[Android Q&A, Help & Troubleshooting] Heeni:
Sorry, not sure what to suggest. Do you have Magisk installed? It might be to do with that.

Otherwise, I'm out of ideas. :(
[Android Q&A, Help & Troubleshooting] bradwatson:
Trying to resurrect this tablet for use as a dedicated car device. Sounds like there are no available ROMs that function? The stock firmware is unbearably slow.
[Android Q&A, Help & Troubleshooting] gabontz:
I'm trying to read back one of these with sp tools and it doesn't work at all.

Has anyone managed to do a full backup to one of these?

Could use some help.

TIA
[Android Q&A, Help & Troubleshooting] gabontz:
Mine doesn't boot at all in recovery. It just boots up. I've started to port one, but I'm missing the files I need mentioned in the tutorial...
[Android Q&A, Help & Troubleshooting] prolinuxusr:
Did your data get wiped or not
[Android Q&A, Help & Troubleshooting] axelmasok:
Some new activity on here.

Not sure if there is any point to TWRP. There are no ROMS other than the factory image and the GSI ROMs.

As I and others have done, we unlocked, root and imaged with the GSI ROM via fastboot.

Anything more interesting than this (new custom build ROM), post it up.

I have worked around the headphone issue on GSI ROM by using a bluetooth headset.

Found while trying to use a Skywatch app that some sensors are either not there or not working...

Also weirdly I can't turn off the wake-on-pick up. Every time I pic it up and move it the display wakes.

Apart from that it's happily Goigle free.

My post #182

https://xdaforums.com/t/lenovo-tab-m8.4049539/page-10#post-87080947
[Android Q&A, Help & Troubleshooting] Pascaliki:
Hi,

I've just buy few days ago a TB-8505F (Tab M8 HD, 2nd gen.) MediaTek Helio A22, 32Gb/2GB. It was Android 10 out of the box. I try to flash many different Android 9 with SP Flash Tool but nothing works, the tablet does not start. The only working rom is "TB_8505F_S300637_220706_BMP".

Resigning myself to staying on android 10, I tried to root with Magisk, again, impossible to flash the rom that magisk modified because the checksum does not match!

I also tried the Russian method mentioned earlier in the thread, no more success..

Update:

Okay, finally I rooted this morning with this method on reddit here with fastboot and adb. I'v use the root.img vbmeta.img made by magisk previously.

good luck
[Android Q&A, Help & Troubleshooting] bs3pro:
I picked one of these for $50.. I'm gonna use it as a smart clock. Anyone using it like that? Thanks
[Android Q&A, Help & Troubleshooting] axelmasok:
Not that I have read here so far.

I can't see why there would be a problem with this

OAN - I've manage to get control of the wake-on-lift issue for the GSI builds. The rear camera is exceptionally rubbish with the GSI builds. Focus is out I never tested the camera with the original ROM... maybe it's just crap.
[Android Q&A, Help & Troubleshooting] bs3pro:
Returned it. This pos isn't worth $50
[Android Q&A, Help & Troubleshooting] Krappa420:
Will this one work?

https://xdaforums.com/t/gsi-13-lineageos-20-trebledroid-based.4517345/
[Android Q&A, Help & Troubleshooting] Heeni:
The "light" version ( https://xdaforums.com/t/gsi-13-lineageos-20-light.4509315/ ) works, with one or two minor bugs. I would assume that the fuller version works as well, but I haven't tried it.
[Android Q&A, Help & Troubleshooting] Krappa420:
Do you know what the bugs are?

Should I be going for the Light version or the regular one?

[QUARTERLY][GSI][13] LineageOS 20 TrebleDroid-based

LineageOS is a free, community built, aftermarket firmware distribution of Android, which is designed to increase performance and reliability over stock Android for your device. LineageOS is based on the Android Open Source Project with extra...

xdaforums.com
[Android Q&A, Help & Troubleshooting] Heeni:
The main bug I've encountered is the screen not automatically turning off. I can't disable wake screen on pickup, but that might be due to not finding it in the settings.
[Android Q&A, Help & Troubleshooting] Krappa420:
Hello Everyone. I managed to Root but wanted to get GSI on this. Trying to install GSI 20 Light.

This is the error I am getting.

Any ideas?
[Android Q&A, Help & Troubleshooting] Krappa420:
I got it. I am an idiot. I didnt extract the file inside the main .kz file and I renamed it to .img and ran it through flashboot and it worked!
[Android Q&A, Help & Troubleshooting] Krappa420:
Anyone the GSI 20/ GSI 20 Light Roms working? I tried both and it bootloops me.

I made sure to run "fastboot flash vbmeta --disable-verification ./vbmeta.img" before pushing the lineage GSI 20 system file.
[Android Q&A, Help & Troubleshooting] Krappa420:
Update:

GSI Thread Download Link: https://sourceforge.net/projects/andyyan-gsi/files/

I got GSI 20 Light to work. Regular GSI 20 does not work (tried 5 times)

Edit I also got GSI 19 to work.

Specific File Names:

GSI 20 LIGHT: lineage-20.0-20230322-UNOFFICIAL-gsi_arm64_vN.img.xz

GSI 19: lineage-19.1-20230323-UNOFFICIAL-arm64_bvN.img.xz

Steps I followed:

1. Ran this command 3 times: fastboot flash vbmeta --disable-verification ./vbmeta.img

2. Ran: fastboot flash boot boot.img

3. Ran this command 3 times: fastboot flash vbmeta --disable-verification ./vbmeta.img again

4. Ran: fastboot flash system GSIofyourchoice.img

5. Ran this command 3 times: fastboot flash vbmeta --disable-verification ./vbmeta.img again!

6. DO NOT GO TO RECOVERY TO FACTORY RESET > Instead Just reboot using: fastboot reboot

7. Done.

Hopefully this helps someone in installing custom ROM (Android 12 and 13) GSI.

Much thanks to @Heeni as well for assisting along the way!

Edit: Latest version of Project Elixir also works: https://xdaforums.com/t/gsi-rom-project-elixir-3-5-android-13-0-aosp-official-13-01-2023.4541063/ but a little laggy

Edit: Havoc OS 3.12 Havoc-OS-v3.12-20201230-Official-arm64-ab.img.xz Works no LAG.
[Android Q&A, Help & Troubleshooting] zenowaren:
@Krappa420 Hi, is double tap to wake works on those GSIs?
[Android Q&A, Help & Troubleshooting] Krappa420:
From what I tested on the GSI 20 Light it works.
[Android Q&A, Help & Troubleshooting] drstrangexd:
Any luck with the pixel experience for Tb-8505F?
[Android Q&A, Help & Troubleshooting] ep312:
@Krappa420 does 20 light resolve the speaker staying on when the headphone is plugged in issue?
[Android Q&A, Help & Troubleshooting] Dhwaj:
Hello guys LENOVO TAB M8 TB-8505F

Android 12.1 lineage os 19.1 gsi working fine and smooth with 2gb / 32gb variant of Lenovo tab m8 hd TB-8505f variant.

Except some rare random app crashes which work after reopening.

And the SD card is not functional initially but after few restarts SD card works as it used used to do.

All the features working except aod and D2TW. WIFI and Bluetooth working.

Intiallly in the first restart the tablet lags little bu after that it works fine.

No ram lags and system freeezes reported till yet .

I am using full version of Android 12 (Andy Yan's lineage os 19.1) the one with gapps preloaded. Gapps work fine . Download the one with extension at bgs arm64 as m8 support a/b operating system and I used the version with gapps pre-installed you can use the one with superuser version with root use only arm 64 variant.

Intiallly the tablet is preloaded with older version of gapps update gapps before using otherwise it will lag .

Newer version of gapps work super smooth.

Flash this lineage os 19.1 only over stock Android 10.

But the geekbench 5 score was pretty low. But the graphics score of 3D mark was fine . I still wonder why geekbench score was pretty low. But there was no noticeable slowdowns.

So I think it was the problem of geekbench 5 only.

The tablet take a while to turn on about 1min.

Now here are some screenshots:-

Here is one video also:-

Screen recording was a little buggy:-

Link will be provided.

For more information ask me.😁😁😁😁

for bricked device I will not be responsible Take risk and install it at your own risk.💯💯💯
[Android Q&A, Help & Troubleshooting] zenowaren:
@Dhwaj I flashed this Android 13 GSI ROM for daily usage(Reading books and surfing, no game). Same bugs which are on Android 12 GSI ROMS. It is very smooth. Also the ROM is updated mounthly.

No random app crashes. That might be because i wiped the device with a fastboot command(But all personal data is deleted), after i flashed rom.
[Android Q&A, Help & Troubleshooting] Dhwaj:
How did you flash Android 13 and which room. Can you please tell it's name because after after all the a13 GSI none of them worked
[Android Q&A, Help & Troubleshooting] Dhwaj:
Hi

I'm out with a new Android 12.1 GSI

THE kaieledoscope os

Smoothest Android 12 GSI on Lenovo tab m8 better than lineage os 19 and evolution X a12 . But only one bug reported when you press the power button the device sleeps but when you press it again it doesn't work to wake up the device.But thankfully in the os there are other features like lift to wake is fully functional.

And to shut down click on power button in the notification shade.

Geekbenchscore was also higher not as stock a10 but I also tried aosp 11 it's geekbenchscore matches with stock a10 score and that was really smooth smoother than stock a9&a10.i think I need to install spectrum or any other performance injector module because I rooted this rom manually with magisk v26.1 as you can see in the screenshot . All the gestures related to power button works fine. And os animation are buttery smooth.

The shocking thing is that all the features worked just as stock and not a single app crash. #DYNAMIC YOU

Here are some screenshots.
[Android Q&A, Help & Troubleshooting] Dhwaj:
Not a single a13 booted except a13 unofficial roms GSI GitHub list.
[Android Q&A, Help & Troubleshooting] zenowaren:
Download this ROM TrebleDroid-A13-20230413-treble_arm64_bgN.img.xz

Here are the fastboot commands that i flash GSI ROM.

Be carefull, it deletes all user data and cache.

adb reboot bootloader
fastboot flash boot boot.img
fastboot --disable-verification flash vbmeta vbmeta.img
fastboot erase system
fastboot flash boot boot.img
fastboot flash system ROM_PATH
fastboot -w
fastboot format cache
fastboot erase userdata
fastboot reboot

After reboot, there is no boot animation. You should wait 5-15 minutes. Than it boots.
[Android Q&A, Help & Troubleshooting] Dhwaj:
Can you please send me that rom's geekbench 5 score please .with screenshot.
[Android Q&A, Help & Troubleshooting] zenowaren:
I couldn't find GeekBench in Play Store so i downloaded from apkpure. Here the result;

My device is: Lenovo M8 TB-8505F ZA5G0100TR
[Android Q&A, Help & Troubleshooting] Dhwaj:
Ooh it's pretty high that's nice.
[Android Q&A, Help & Troubleshooting] BaneSRB1:
I tried flashing TWRP onto my Lenovo but it seems it rolled back? Can anyone guide me on how to do it properly?
[Android Q&A, Help & Troubleshooting] Krappa420:
Everyone, if you are flashing GSI ROMs. I suggest flashing ones without GAPPS because I have seen major difference. The once with GAPPS slowed the device down horribly. I just use Aurora Store instead of play store and flashed the one without gapps
[Android Q&A, Help & Troubleshooting] names:
I have the lenovo tab m8 tb-8506f variant and was messing around with installing GSI builds today, seeing which would be best, when I realized after finally getting the process down and the roms booted they cannot detect internal storage? What I mean is, I cannot download any files from the web or Google Play Store as the system thinks there's no storage space available. Thoughts?

Now today cannot get the device out of fastboot mode and have never been able to use the SP Flashing Tool
[Android Q&A, Help & Troubleshooting] thierry beccaro:
I had the same storage issue after flshing GSIs (also with tb-8506f), no idea why but didn't search for a solution too much.

You can use this to rescue to tablet, it's lenovo's own sp flash tool :

Rescue and Smart Assistant (RSA) - Lenovo Support US

support.lenovo.com
[Android Q&A, Help & Troubleshooting] names:
Thanks for the reply, but unsure this will work for me. I am at the Authorization step for, "Check this option on your device to authorize USB debugging." but cannot since I am limited to the Fastboot, Fastbootd, and recovery screens. I am able to get to the little dead android screen with "Error!" but cannot get anywhere to allow for the next step(s)
[Android Q&A, Help & Troubleshooting] thierry beccaro:
Your tablet need to be switched off to perform the rescue
[Android Q&A, Help & Troubleshooting] names:
Yes, that is where I start but upon plugging in via USB to the computer it boots right into fastboot as soon as it detects power via the USB.

Update: The recovery tool worked this morning with no issues. The device did not auto power on like previous times and the tool flashed back the factory ROM and the device has now booted correctly.

Thanks again @thierry beccaro !
[Android Q&A, Help & Troubleshooting] Velitacast:
Anyone have any theories about what's causing the internal storage bug? I've tried a handful of GSIs with several different flashing methods (full wipe before and after flash, no wiping, rescue then flash) and they all seem to present the same issue. External SD card doesn't seem to work either, even after formatting. Working with a TB-8506FS here, willing to help test.
[Android Q&A, Help & Troubleshooting] Dhwaj:
Bro which gsi ur using send the name

I think you are using m8 3rd gen I'm using an m8 hd 2nd gen.

Am correct?
[Android Q&A, Help & Troubleshooting] ep312:
This install works well for me and is the first Android 13 rom I've used on the M8, but it has the same audio issue (plugging in the headphone doesn't disable the internal speaker) as the AndyYan LineageOS builds.

I couldn't get the LineageOS 20 Light rom working. I'm just going to buy a bluetooth adapter to work around the headphone issue.

This is for the TB-8505F (second gen). It sounds like the folks who have been able to get the Lineage 20 roms working, and those that have the issues with the sdcard not being recognized have the third generation.
[Android Q&A, Help & Troubleshooting] names:
I cannot speak for @Velitacast but can confirm the TB-8506FS is a Gen 3.

I have the Gen 3 - TB-8506F with the same issue. ROMs I have tried have been those from the Generic System Image (GSI) list on Github. I tried many in the list, some work well on the device while others can't get past the setup screen. A few I have tried and setup, which work well sans the storage issue, are Project Elixir and Evolution X.

While flashing, these were the cmd's I was using:

Within FASTBOOT-D:

fastboot flash boot boot.img

fastboot erase system

fastboot flash boot boot.img

fastboot flash system "Name of Custom Rom.img"

Within FASTBOOT:

fastboot -w

fastboot erase userdata

fastboot reboot

System would load fine with ROM and could setup but then upon trying to download or install any app it says there's not enough storage/storage issue. View the storage and there's plenty, but the system doesn't recognize/can't access it.
[Android Q&A, Help & Troubleshooting] Dhwaj:
Hello

Today is the review of elixir project

The experience was smooth.

No issues,SD card works perfect.

CPU geekbench scores with just system game mode on no other tweaks.

These are with raiden perf tweaks with perf mode on not he gaming mode . 3 consecutive runs.

A lots and lots of customisation. Full of customisation

Android 13 version elixir project v3.8

Here are some screenshots