extract boot.img to root the tablet T8100 Allwinner A100

[franchu29]

Did you did the OEM unlock under developer setttings? Also did you typed in fastboot mode, fastboot oem unlock , if you did continue to the next step, go to device manager and update the driver if it shows up as USB developer, then go back your platform tools CMD window and type fastboot devices

Thanks for your help.

I check oem unlock in developer options menu

I didn't do was the fastboot oem unlock command (I didn't see it in the instructions)

My problem is that now it doesn't start, it doesn't recognize adb or fastboot.

In device manager it appears as android adb interface (attached screenshot)

The tablet starts and stays on screen with robot (attached screenshot too)

any idea how to solve?

 

[Cosmin David]

Thanks for your help.

I check oem unlock in developer options menu

I didn't do was the fastboot oem unlock command (I didn't see it in the instructions)

My problem is that now it doesn't start, it doesn't recognize adb or fastboot.

In device manager it appears as android adb interface (attached screenshot)

The tablet starts and stays on screen with robot (attached screenshot too)

any idea how to solve?

You got the wrong driver, right click on the device uninstall, disconnect the tablet after that install this


https://forum.xda-developers.com/t/...vers-15-seconds-adb-installer-v1-4-3.2588979/

After installation reconnect your tablet to your PC and you should see USB developer( in device manager) right click update driver choose the driver from a list.. select android phone , Google , bootloader interface

Go back to platform tools start CMD as administrator set root folder cd your path to platform tools, then type fastboot devices, at this point you should see your device, after that run the command fastboot reboot fastboot it should reboot to fastbootd, in fastbootd run the commands listed, one by one

 

[franchu29]

You got the wrong driver, right click on the device uninstall, disconnect the tablet after that install this


https://forum.xda-developers.com/t/...vers-15-seconds-adb-installer-v1-4-3.2588979/

After installation reconnect your tablet to your PC and you should see USB developer( in device manager) right click update driver choose the driver from a list.. select android phone , Google , bootloader interface

Go back to platform tools start CMD as administrator set root folder cd your path to platform tools, then type fastboot devices, at this point you should see your device, after that run the command fastboot reboot fastboot it should reboot to fastbootd, in fastbootd run the commands listed, one by one

Thanks, now i can restart and enter in fastboot mode

My problem now, the comand fastboot oem unlock dont work, it say:

FAILED (remote: 'Command not supported in default implementation')
fastboot: error: Command failed

how can i do?

Very thanks for your help

 

[Cosmin David]

Thanks, now i can restart and enter in fastboot mode

My problem now, the comand fastboot oem unlock dont work, it say:

FAILED (remote: 'Command not supported in default implementation')
fastboot: error: Command failed

how can i do?

Very thanks for your help

Go back to system , fastboot reboot ,comfirm if you did enabled OEM unlock under developer setttings

 

[franchu29]

Very Very thanks

All working

 

[Cosmin David]

Very Very thanks

All working

Happy to help

 

[Sigidr]

Hi guys,

I received this same gift tablet and after 2weeks of (barely) using it, it's stuck in a boot loop.

I see the allwinner logo, the screen goes back off and the logo appears again, this goes on until the battery dies, and i can't even turn it off, it responds to the on/off and reset button (the logo disappears instantly) but after 1sec it's stuck again.

I finally found a way to turn it off so i could enter the menu (using vol.up and power button), i wiped all data but nothing changed.
Now i'm looking for a way to reinstall it's firmware but i don't have any experience on this...
Connecting it to my pc is useless, it doesn't get recognised (it only charges) so i was thinking about using the 'update through sd card' option, but what files should i put on the sd, where can i find them?

Any help would be very welcome

Grtz,
Sigidr

 

[SamuEDL]

Hi guys,

I received this same gift tablet and after 2weeks of (barely) using it, it's stuck in a boot loop.

I see the allwinner logo, the screen goes back off and the logo appears again, this goes on until the battery dies, and i can't even turn it off, it responds to the on/off and reset button (the logo disappears instantly) but after 1sec it's stuck again.

I finally found a way to turn it off so i could enter the menu (using vol.up and power button), i wiped all data but nothing changed.
Now i'm looking for a way to reinstall it's firmware but i don't have any experience on this...
Connecting it to my pc is useless, it doesn't get recognised (it only charges) so i was thinking about using the 'update through sd card' option, but what files should i put on the sd, where can i find them?

Any help would be very welcome

Grtz,
Sigidr

If you don't have the bootloader unlocked, it can't be recovered at this time.

 

[Baio98]

Bravi ragazzi, lascio boot.img per Tablet T8100 e patchato con Magisk. Funziona correttamente su Rom Stock (Android 10 GO) su tablet T8100 con scheda madre BND-A863-CV2.0.

View attachment 5547199

Come curiosità, attualmente sto utilizzando le rom GSI sul mio tablet. Il problema è che nelle Rom basate su Android 11 e 12 il Gyro Sensor non funziona. Su Android 10, se funziona

View attachment 5547205

Edit: ho allegato anche il dump della Rom Stock del mio Tablet, nel caso qualcuno ne avesse bisogno. https://www.mediafire.com/file/h0hnqhwah2qyf7y/RomStockT8100.zip/file

Può essere eseguito solo da fastboot come dump e solo se si dispone di un bootloader di sblocco.

Buongiorno, ho utilizzato il file boot.img quello linkato da te, ho scaricato magisk e ho installato boot.img tramite magisk. il bootloader l'avevo sbloccato (opzioni sviluppatore -> sblocco oem) però è andato in brik. All'accensione mostra un robot verde con la pancia aperta (sia che faccio vol+ +,,accensione, sia che faccio vol- + accensione). Quando funzionava l'avevo messo in modalità fastboot, c'era un titolo tipo modalità fastbootlb. Facendo fastboot devices mi usciva il tablet. Ora con questa schermata non viene riconosciuto ne adb devices, ne fastboot devices. Non posso reinstallare il sistema operativo perché non mi esce nessun menù.
Qucuno è in grado di aiutarmi per favore? Andrebbe bene anche senza modifiche, con il software di fabbrica.
Grazie mille,

 

[SamuEDL]

Buongiorno, ho utilizzato il file boot.img quello linkato da te, ho scaricato magisk e ho installato boot.img tramite magisk. il bootloader l'avevo sbloccato (opzioni sviluppatore -> sblocco oem) però è andato in brik. All'accensione mostra un robot verde con la pancia aperta (sia che faccio vol+ +,,accensione, sia che faccio vol- + accensione). Quando funzionava l'avevo messo in modalità fastboot, c'era un titolo tipo modalità fastbootlb. Facendo fastboot devices mi usciva il tablet. Ora con questa schermata non viene riconosciuto ne adb devices, ne fastboot devices. Non posso reinstallare il sistema operativo perché non mi esce nessun menù.
Qucuno è in grado di aiutarmi per favore? Andrebbe bene anche senza modifiche, con il software di fabbrica.
Grazie mille,

As long as you don't install the fastboot drivers you won't be able to recover it. For this you will have to force the drivers. The device "USB Developer", uses this driver:

 

[Baio98]

As long as you don't install the fastboot drivers you won't be able to recover it. For this you will have to force the drivers. The device "USB Developer", uses this driver:

View attachment 5626577

Sorry I didn't read your first answer, it worked great! Thanks thanks thanks