[ROOT][TWRP RECOVERY] Onda V972 Quad-core | Allwinner A31

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tcampomanes

Senior Member
Mar 9, 2010
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Ehy ankar,i'm installing the firmware v3.0 4.2.2 and i do the command cat / proc/partitions...this si the result, it's different than the 4.2.2 v2.3beta
ha6eme9u.jpg


Inviato dal mio V972 Core4 con Tapatalk 2

Yes, partitions are the same as in previous versions to beta, the twrp TWRP2500_Onda_v972_stable, work fine with v3.0 4.4.2 , I could install the recovery.
 
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vel_tins

Senior Member
Jun 23, 2007
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Bangkok
EDIT:

I found no easy solution, so I made some modifications and compiled TWRP 2.5 from source against the latest Onda Kernel (SDK 3.2)

ATTENTION: Only tested with the 3.2 Firmware!
Does not work with 2.0 ROM's and below. Definetely! :cool:
It might work with 3.0...BUT AGAIN: NOT tested and it might brick your device!

Download

******************************************************************************************************************************************************************

Worked like a charm up to SDK 3.0.
Now tested with the new SDK 3.2 and just booting into TWRP, than rebooting into System, is corrupting the ROM.
Does TWRP writes something to the device's file-system, even when it's just starting?

Device Onda V972.
My steps:
  • installed TWRP 2.5.0 on my device
  • than reboot in to recovery. Went well, but TWRP needed a long time to start and after starting, the Touchscreen didn't work.
  • turned the tablet off and than on again, device is booting, but stucks at the boot-logo.
no chance, to get it back to life.

Had to flash stock recovery via ADB.
Than booting into stock-recovery, factory reset and everything was ok.
Tablet was booting fine.
It seems that there is some incompatibility with the new SDK 3.2 + TWRP

But partition table is the same:
Code:
cat /proc/partitions
major minor  #blocks  name

  93        0      20480 nanda
  93        8      16384 nandb
  93       16      16384 nandc
  93       24     786432 nandd
  93       32    2097152 nande
  93       40      16384 nandf
  93       48      32768 nandg
  93       56     524288 nandh
  93       64     131072 nandi
  93       72   11022336 nandj

"nanda" seems to be larger than before?
 
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hurray

Senior Member
Oct 25, 2010
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Samsung Galaxy Tab S2
Does youre new compile works at your Onda V972 with firmware 3.2?

I have the same situation:
I own a Onda V973 V1 and up to Firmware 3.0 I am able to use the TWRP 2.5.0.0 from the V972 without any issues (backup and restore of course).

After I flashed firmware 3.2 I flashed TWRP 2.5.0.0.
I rebooted into recovery (works without problems) and made a backup (works without problems too).
After I rebooted to normal mode I see that a lot settings are deleted (e.g. wifi is not working anymore, keyboard settings are lost, my launcher does not run anymore and so one).

I will reset the V973 and try your compile as soon as possible. :good:
 

hurray

Senior Member
Oct 25, 2010
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Samsung Galaxy Tab S2
Hi vel! :)

Your version works pretty well, thank you very much! :highfive:
I am able to backup and restore my V973 V1 under the firmware 3.2 with your modified TWRP 2.5.0.0.

The only thing I have seen was a really long foldername under /mnt/sdcard/TWRP/BACKUPS/<extreme long number>/<date of backup>. Is this for a reason?

Cheers,
hurray
 
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hurray

Senior Member
Oct 25, 2010
626
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OnePlus One
Samsung Galaxy Tab S2
Hi vel!

New informations:
Backup to internal sd-card works but I can not choose the external sd-card as target for the backup anymore, only the internal sd is choosable.

Under "Mounts" I can mount the external sd and I can access it via the file manager of TWRP.
I have enough space free on the external sd and its formated with FAT32.

Do you have any ideas?
 
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STEVE_MARS

Senior Member
Feb 8, 2009
658
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Valencia
Recovery for Voyo A15

All instructions in that post.
So, if you want to install TWRP with script, yes, just change partition for recovery to nandd

Hello, my friend.
Recently I bought a new tablet, a Voyo A15 with ARM A15 Exynos 5250. Very good tablet.
I can´t extract recovery.img for try compile a Recovery, with cat /proc/mtd nothing found, and with fdisk -l /dev/block/mmcblk0:
qfip.jpg


Can you help me, please?
Thank you very much, really.
 

vel_tins

Senior Member
Jun 23, 2007
311
72
48
Bangkok
Completely different tablet, maybe better to open a new topic?
Anyway, whats the output of:
fdisk -l /dev/block/nand*
cat /proc/partitions
?
 
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natkingcole

Senior Member
Jun 3, 2012
97
36
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EDIT:

I found no easy solution, so I made some modifications and compiled TWRP 2.5 from source against the latest Onda Kernel (SDK 3.2)

ATTENTION: Only tested with the 3.2 Firmware!
Does not work with 2.0 ROM's and below. Definetely! :cool:
It might work with 3.0...BUT AGAIN: NOT tested and it might brick your device!

Download

Could you pls make it compatible for 160 DPI (Onda V812)? It works, but I can only see the upper left side. Fortunately itt's enough for installing zips. Danke dir ;)

EDIT: dont mind, I read that twrp and cwm won't work on v3.2 but in fact.....CWM works fine.
 
Last edited:

Jhn1

Member
Feb 27, 2008
17
1
0
Chicago 'burbs
I lost touch screen too

Device Onda V972.
My steps:
  • installed TWRP 2.5.0 on my device
  • than reboot in to recovery. Went well, but TWRP needed a long time to start and after starting, the Touchscreen didn't work.
  • turned the tablet off and than on again, device is booting, but stucks at the boot-logo.
no chance, to get it back to life.

Had to flash stock recovery via ADB.
Than booting into stock-recovery, factory reset and everything was ok.
Tablet was booting fine.

I tried TWRP 2.6.0 and CWM, both lost touch screen. The stock recovery reinstall always leaves me in Chinese.

Which I don't read.
 

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  • 14
    Hello, Everybody!
    CAUTION : I'm not responsible for any damage to your device.Use at your own risk
    I want to introduce to you a Team Win Recovery Project 2.4.1.0 for Onda V972.
    I think it will be usefull and for Onda V812, and V971, maybe other A31 tablets.
    That TWRP works on 32 Gb version of Onda V972.

    Installation TWRP Recovery on Onda V972
    Before installing TWRP, you need to get root. All latest stock firmware comes with root, you need only install Superuser or SuperSU from Play Market
    Download the Onda_V972_TWRP.zip from that post and extract it to any folder on your computer.
    Copy all three files from your computer internal disk (ONDA_MID on you computer and /sdcard on tablet)
    Install the application Terminal on the tablet and run it.
    From the terminal emulator enter the following command:
    Code:
    su
    Press Enter. Allow access to the application or SuperSU SuperUser
    Code:
    busybox sh /sdcard/install-recovery.sh
    Press Enter. This command installs new recovery to your tablet.
    Code:
    busybox sh /sdcard/reboot-recovery.sh
    Press Enter. This will load the device mode recovery.
    You can also use the standard way of loading in recovery - While the tablet is off press Home button and holding it press the Power button untill 4 core logo appears.

    If something goes wrong, you need to flash the firmware via Stock PhoenixSuit and during flashing select "YES" to the question about formatting.

    It is not bug free version, there is a error: Unable to mount '/recovery' I will try to fix all bugs.
    I repeat: Use it on your own risk!

    Credits:

    Thanks to Dees_Troy and all TWRP team for great work!
    Thanks to darkrickpr from slatedroid for base TWRP
    Thanks to hariprasadiit for his CWM port and his post.
    9
    TWRP 2.5.0.0 for Onda V972

    TWRP 2.5.0.0 for Onda V972
    What's new in 2.5.0.0:

    Special Note: If you are running a custom theme, the changes in 2.5.0.0 will likely not be compatible with your theme.

    Added scrollable partition lists for mount, backup, restore, wipe, and storage selection
    Add new SliderValue GUI element for selecting brightness and screen timeout (thanks to Tassadar)
    Re-work AOSP and TWRP code to improve license compatibility between GPL and Apache
    Added official theme for 1080x1920 portrait devices (HTC DNA, HTC Butterfly, Oppo Find 5, Sony Xperia Z, etc)
    Fixed a problem with directory permissions on split archive backups
    Fixed a problem with md5 verification of backups
    Added a search function to libtar (thanks to kokotas)
    Improve handling of XML errors (fix permissions)
    Fixed handling of subpartitions
    Improvements to recovery.fstab flags
    Fixed a problem with decryption not being able to locate the decryption key in some situations
    6
    TWRP based on lastest 2.4.4.0 for Onda V972 by ankar84

    Well. On my main forum 4pda.ru nobody wanted to test latest stable version of TWRP. Apparently everyone is busy updating the firmware to version 2.0. So, I decided to publish TWRP stable version here. But, please note, I have no positive results of using this version of TWRP for 32 GB version of the tablet.
    TWRP based on lastest 2.4.4.0 for Onda V972 by ankar84
    Download: Ya.Disk | Mega

    Differences between TWRP and CWM Recovery
    • Graphical user interface with full touch control.
    • Batch patches (up to 10p in the queue).
    • Customizable backup/restore. You can choose which partitions to backup/restore if you want to use compression and generate md5-sum set their own names backup and delete unwanted right from recovery
    • Displays the time (time zone adjusted separately), battery.
    • Saving settings of the recovery on microSD-card.
    • Built in Terminal Emulator.
    • The ability to connect the two cards to the computer as a USB-carriers.
    • Built-in file manager, with copy, move, delete, rename, change permissions.
    • A detailed log file.
    • Theming support.

    TWRP based on latest stable version 2.4.4.0
    Internal and External memory are mounted properly.
    Internal memory installed in the /sdcard
    External Memory installed in the /external_sd
    You can store backups on a Internal and External memory as well.
    External card is automatically mounted
    Checked backup and restore - work

    Team Win Project site
    Compile manual
    Thread on XDA
    4
    TWRP_Onda_v972_ver02

    Hi again.
    After various checks, really mount internal memory like external.
    Where say "using internal memory" show the contents of external SD.
    not if I explain well...
    Hi, Steve!
    I take this opportunity to thank you for the excellent work SuperNova!
    As regards that TWRP, I told, that it`s like an alpha version with a lot of bugs, and not everything working propertly. I just tested installing custom rom (SuperNova 3.1 and Iberica v.2) and it`s worked. And on my forum I asked people who have 32 Gb version of tablet if they can to install custom on their tablet, and they confirmed, that it`s work pretty good.
    Just want to clarify a bit more on that as is currently working of that alpha version of TWRP.
    When you boot into TWRP without external microSD card your internal memory (/sdcard on tablet and ONDA_MID on computer) will be Internal Storage in Mount menu of TWRP
    When you boot into TWRP with external microSD card it will mount like a Internal Storage again, and there is no tablet real /sdcard mounted.
    I also would like to note that in the Mount menu, item Mount SDCard will not work! Never! Now we are working on fix that problem.
    But now, I made a new version, lets call it TWRP_Onda_v972_ver02 and it can mount both ext-sd and internal memory. But ext-sd you need to mount manualy, and we are working on that too.
    In new version:
    Internal Storage is a internal tablet memory (/sdcard on tablet and ONDA_MID on computer) Mounts at /sdcard
    SD-Ext is a External microSD card, don`t forget to mount it manualy. Mounts at /sd-ext
    2
    Thanks ankar84! It really had been so helpful and I had been able to install both SN & Iberica successfully :good:. Can you please guide how to update the new recovery on the earlier one. Will the new recovery overwrite the earlier one by simple installation?
    Hi, aryanitinkumar!
    New recovery always overwrite the earlier one, so there is no big manual about installing new TWRP on old TWRP.
    Today I compiled a new TWRP version for Onda V972 based on lastest stable TWRP 2.4.4.0

    The internal and external memory mounts properly.
    The internal memory is mounted in /sdcard
    External memory is installed in the /external_sd
    You can store backups on both the internal and the external memory.
    External card mounted automatically.
    Checked the backup and restore - worked great!


    But now I publised on 4pda.ru to 32Gb version owners test it on their tablets. If everything will be good, I will publish it here!
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