CWM Recovery with UBIFS Support For Amlogic Nextbook Tablets (Support Thread)

[roadkill]

cwm

Are you using a Next8HD8G with a NXM8000ND_WM board?

ShaunMT

yrs did like u said with the editor an it said wm

[acidgirltogo]

Probably not, read the thread, this has already been explained. If you're bricked (no screen display), you've got a bad bootloader, which means you've probably got the other board version and are going to need an unbrick kit, a different recovery version, and a new ROM version.

It won't be too long now...

ShaunMT

That's what I thought, I was just double checking that I understood everything.

Thank you for all you do. Totally going to click your Donate button this weekend when I get paid!

[shaunmt]

yrs did like u said with the editor an it said wm

I've never seen a backup fail. Are you sure you had enough space on your external SD card to hold the backup?

If so, then I would guess your data partition is corrupted and I would consider wiping it, formatting it, and then reinstalling apps and settings manually.

ShaunMT

[acidgirltogo]

Probably not, read the thread, this has already been explained. If you're bricked (no screen display), you've got a bad bootloader, which means you've probably got the other board version and are going to need an unbrick kit, a different recovery version, and a new ROM version.

It won't be too long now...

ShaunMT

So... wait.

My tablet turns on and loads two different loading screen before getting stuck on the screen with the lady wearing the headphones. Then stays like that forever. That is what I am calling bricked. Is that the same kind of bricked you are referring to?

[shaunmt]

So... wait.

My tablet turns on and loads two different loading screen before getting stuck on the screen with the lady wearing the headphones. Then stays like that forever. That is what I am calling bricked. Is that the same kind of bricked you are referring to?

The guys who flashed the ROM for the wrong board can't even get their screens to turn on.

Your tablet isn't bricked, it's boot looping. The boot animation is supposed to play until it finishes booting, but something keeps crashing and it just keeps trying over and over until you turn it off or the battery dies.

You should try booting into recovery. Any recovery, internal stock 3e, modded 3e on external SD, or CWM on external SD.

If you can get to recovery, we just need to determine what ROM you need to flash to fix yours.

If you can't get to recovery mode, then you'll still need an unbrick kit, unless you've got hardware damage.

ShaunMT

[locuraconsigueusted]

I was looking over your past posts, and It looks like you bricked your tablet by installing one of my prevoius ROMs and have been trying to fix it ever since? Is that correct?

I think you've got the the other board and will probably need an unbrick kit, a different recovery version, and a new ROM to get it working properly.

ShaunMT

No, I bricked my tablet by editing system files MANUALLY, not by flashing one of your previous ROMS, which I HAD done on a previous tablet, and doing too much, doing something wrong, or something of that nature. I am experiencing a bootloop, exactly like acidgirltogo, in bold in the quote below. I CAN boot into recovery, both stock and your modified version. I just cannot boot into CWM, which I was hoping to use to make a backup and, using that backup, find out what went wrong during the tweaking process. Sorry for any confusion.

So... wait.

My tablet turns on and loads two different loading screen before getting stuck on the screen with the lady wearing the headphones. Then stays like that forever. That is what I am calling bricked. Is that the same kind of bricked you are referring to?

[roadkill]

cwm

I've never seen a backup fail. Are you sure you had enough space on your external SD card to hold the backup?

If so, then I would guess your data partition is corrupted and I would consider wiping it, formatting it, and then reinstalling apps and settings manually.

ShaunMT

how much space we need for this tablet for back up ?

[shaunmt]

No, I bricked my tablet by editing system files MANUALLY, not by flashing one of your previous ROMS, which I HAD done on a previous tablet, and doing too much, doing something wrong, or something of that nature. I am experiencing a bootloop, exactly like acidgirltogo, in bold in the quote below. I CAN boot into recovery, both stock and your modified version. I just cannot boot into CWM, which I was hoping to use to make a backup and, using that backup, find out what went wrong during the tweaking process. Sorry for any confusion.

Ok. I didn't know you had two different tablets, and I thought you were bricked rather then bootlooping.

CWM should boot... considering internal stock 3e and my modified stock 3e are visually identical, I'd bet the modified stock 3e is failing also but properly reverting back to internal stock 3e instead of hanging like CWM.

That would explain why signature verification is still failing for you.

Unfortunately, I don't know what else to try for you, until I get the unbrick kit released. The unbrick kit should force everything to boot properly because it will boot ENTIRELY from external SD and also prepare your tablet to be completely reflashed. You'll still be able to ATTEMPT a backup before flashing.

ShaunMT

[shaunmt]

how much space we need for this tablet for back up ?

That would depend on how much space you had consumed.

I'd guess it could be anywhere between 500MB and 6GB total.

ShaunMT

[locuraconsigueusted]

Ok. I didn't know you had two different tablets, and I thought you were bricked rather then bootlooping.

CWM should boot... considering internal stock 3e and my modified stock 3e are visually identical, I'd bet the modified stock 3e is failing also but properly reverting back to internal stock 3e instead of hanging like CWM.

That would explain why signature verification is still failing for you.

Unfortunately, I don't know what else to try for you, until I get the unbrick kit released. The unbrick kit should force everything to boot properly because it will boot ENTIRELY from external SD and also prepare your tablet to be completely reflashed. You'll still be able to ATTEMPT a backup before flashing.

ShaunMT

Alright, thanks, I'll be waiting for those unbrick kits. If I had money, I'd donate. But I'm 14. So yeah. Thanks for all your work!

[roadkill]

space for cwm

That would depend on how much space you had consumed.

I'd guess it could be anywhere between 500MB and 6GB total.

ShaunMT

went through the internal and external sd removed o bounch of junk now every thing ok this little diffetent from my phone when i put cwm on it is there a way to het cwm flashed to the tablet?

[shaunmt]

went through the internal and external sd removed o bounch of junk now every thing ok this little diffetent from my phone when i put cwm on it is there a way to het cwm flashed to the tablet?

Glad you got it working!

I won't support flashing custom recovery internally on Amlogic hardware for the following reasons:

• It's not necessary when you can boot from external SD.
• Keeping the internal stock recovery will ensure you can still install official updates, if one is ever released by the manufacturer.
• For some reason, wiping data, cache and media using the internal stock recovery is sometimes the only thing that works to get everything working correctly when partitions get corrupted.

ShaunMT

[roadkill]

cwm

Glad you got it working!

I won't support flashing custom recovery internally on Amlogic hardware for the following reasons:

• It's not necessary when you can boot from external SD.
• Keeping the internal stock recovery will ensure you can still install official updates, if one is ever released by the manufacturer.
• For some reason, wiping data, cache and media using the internal stock recovery is sometimes the only thing that works to get everything working correctly when partitions get corrupted.

ShaunMT

only reason i asking is thats how my cell is this way i can have cwm shut down and reboot and in stall new rom .i hear u and trust u cause u know this stuff 1000 times better then me thanks for all ur work and every on else who hel
ed u out on this tab great job

[catprompt]

cwm not installed after following instructions, or?

This thread contains links to CWM Recovery with UBIFS support for Amlogic based Nextbook Tablets. These are built from CM10 source, with Amlogic and UBIFS support forked from the Github repos of Christian Troy and Librehat. Thanks to both of them for sharing their source code! I plan to publish my Nextbook changes, once I learn more about the use of Github.

I will be adding custom versions to this thread for additional tablet models as I get them compiled and packaged with the proper kernels, etc.

Please make sure you download the correct version for your device!

While some versions may work on other tablets, differences such as partition layouts that are hard coded into the kernel could cause a flash to fail and brick your tablet. Because of this, I can not support the use of a custom recovery on a device that it was not intended for.

These files will be named in the format: "model"-"board"-CWM.zip

Verify these entries in your stock build.prop before downloading: ro.product.model and ro.product.board

Installation:

1. Download the appropriate version for your device below
2. Unzip the downloaded file
3. Remove the uImage_recovery file and place it in the root level of your external SD Card
4. Insert External SD Card in your device
5. Power on device while holding volume-
6. PERFORM A BACKUP!!! This will backup everything except your bootloader.


Download Thread:

CWM-Recovery-with-UBIFS-Support-For-Amlogic-Nextbook-Tablets

this procedure seems to have not worked, when I reboot to recovery, I get the stock recovery,but if I power down and start with the button combination I get cwm. ROM toolbox still says I need to install cwm. any ideas? I have an idea, can I install the zip using the cwm recovery? I have the modified stock recovery and the stock ROM on a different SD card.

[shaunmt]

this procedure seems to have not worked, when I flash to recovery, I get the stock recovery,but if I power down and start with the button combination I get cwm. ROM toolbox still says I need to install cwm. any ideas?

It's working as expected.

Rebooting to recovery from within Android will always default to the internal recovery.

CWM can by booted from external SD card by holding the button combination.

I'm not planning to support installing CWM internally.

See my previous post in this thread for a list of reasons.

ShaunMT