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Nobis NB07 and DA-741QHD rooting and ROM thread

24th December 2014, 07:37 AM |#51  
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Quote:
Originally Posted by Onoitsu2

If anyone wants the rooted (with superuser as the managment app, instead of kinguser) I have them all hosted on my hard drive plugged into my router.

You can obtain the .img files at the following url...
https://onoitsu2.no-ip.org:4443/shar.../TabletImages/

Disregard the browser warning, it is because it is not encrypted but my router hosts it as https, go figure.

I also will be putting the drivers into that location in their own folder.

Hoping this benefits those more advanced users to create awesome things for this device. Beware if you try to write over the boot image, it will only show the a31s logo and that is all, unless it is a success, and I have been as of yet been unable to locate fastboot drivers for this device.

And advice for fastboot drivers is much appreciated.

Really sucks my kid lost my tablet as I gave up trying to root it but like to give it another go.

Also, that root genius is all in Chinese and it wants to install some other junk on my computer. Wish they would make english versions of this stuff and not make it install a ton of garbage on your computer.
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24th December 2014, 07:47 AM |#52  
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There is an english version. I will upload to my dropbox tomorrow and link here. I am too tired, and should have been asleep a couple of hours ago... lol
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24th December 2014, 06:55 PM |#53  
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Quote:
Originally Posted by Onoitsu2

There is an english version. I will upload to my dropbox tomorrow and link here. I am too tired, and should have been asleep a couple of hours ago... lol

That would be great! Thank you.
24th December 2014, 08:49 PM |#54  
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Here it is straight from my dropbox. https://www.dropbox.com/s/5gy4iwiis4...us_en.exe?dl=0

Hope it helps the root movement... lol
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27th December 2014, 10:49 PM |#55  
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which image file do I need? I have the Radio Shack version. TIA
27th December 2014, 11:45 PM |#56  
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Image file? That is a dump of each partition on its own. Seeing as there is no twrp or other bootloader that is capable of nandroid backups that is the best we have, unless someone can get fastboot working then I will gladly risk my tablet to test bootloaders. Already had one die and exchanged out due to messing with the bootloader.

---------- Post added at 04:45 PM ---------- Previous post was at 04:44 PM ----------

I might be able to install online nandroid and back up the tablet, but with no restoral method known, ... ... why even do that?
15th January 2015, 07:46 AM |#57  
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This is a complement to the previous post on how to access the tablet using adb on Windows by Onoitsu2:
http://forum.xda-developers.com/show...9&postcount=44

For those working on Linux, this is how I accessed the tablet on Ubuntu 12.04.
To check that the tablet is connected to the computer via USB, in the Terminal simply type:
Code:
lsusb
The output should contain something like:
Bus 00X Device 00Y: ID 2922:8005
(for NB07 in media device MTP mode)
Bus 00X Device 00Y: ID 2922:8043
(for NB07 in camera PTP mode)
Bus 00X Device 00Y: ID 2922:8001
(for NB07 in USB storage mode)

2922 being the manufacturer number, I added the rule to the relevant file by typing:
Code:
sudo gedit /etc/udev/rules.d/51-android.rules
and adding the following lines in the file (replace the YOUR_USERNAME portion, keep the quotes):
Code:
#Nobis
SUBSYSTEM=="usb", ATTR{idVendor}=="2922", MODE="0666", OWNER=“YOUR_USERNAME”
Save and close the file. Activate the changes by typing:
Code:
sudo service udev restart
A similar procedure was sufficient to get my HTC phone recognized. However, for the NB07 I also needed to add the information to the adb_usb.ini file. This can be done by running the following command in the terminal
Code:
echo "0x2922" >> ~/.android/adb_usb.ini
alternatively, if you prefer, find adb_usb.ini and open it using your favorite text editor and add the following line
Code:
0x2922
at the end of the file.

That is it. Checking that the tablet is accessible by adb can be done by running the following command:
Code:
adb devices
Last edited by roots-bloody-roots; 15th January 2015 at 08:29 AM.
24th February 2015, 07:25 PM |#58  
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Well, I can say I have successfully rooted my Nobis NB07 tablet today and am running SuperSU on it! Couldnt be happier and only took a little over a year. haha!

I will post up my directions later today but I used iRoot (Formerly vRoot and also in English). I then installed SuperSU from the app store and updated the binaries then was able to remove Kinguser.

Oh yeah, my kid found my tabled about 2 weeks ago so I was hard at it again today. lol
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25th March 2015, 04:04 AM |#59  
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Ok, this is a little ironic but it turns out we had root access to the tablet all along since post #2 by the OP. It only took me four months to realize that.
Below, in PART 1, is how NOT to root the tablet (if you choose not to do so) and, in PART 2, how to root it by hand (if you still want to root it).

PART 1: How to access everything on the tablet, including /system without rooting it.

As mentionned in the by the OP. There is an image of the firmware of a similar tablet that can be obtained on www: iviewus.com/firmware788TPC/ Get the file.

Burn the image onto an SD card with PhoenixCard using the startup option.

Boot the tablet from the SD card: Insert card, press (and keep pressed) the return button, turn the tablet ON, release the return button as soon as you see the A31 logo.

Troubleshooting:
The A31 boots slightly differently from the other Allwinner chipsets. More info here: linux-sunxi.org/BROM if you are interested. You should see an "IVIEW" logo during the boot and you should be able to acess two of the partitions on the SD card once it is booted. If you see the NOBIS logo and get an error saying damaged SD card, you did not boot from the SD, try again and make sure you are not booting in "Quick Boot Mode".

You might not realize it yet, but you are essentially done. Congratulations!

What just happened is that you booted the boot partition on the SD card which, as it turns out, loads a rooted kernel and ramdisk to your RAM. The nice thing is that the rest of the system is mounted from your own NAND partitions. This is why everything looks the same. Nevertheless, you can have full access to your tablet using ADB.

If you want to modify /system on your NAND. Connect the tablet to your computer via USB and fire up adb. The following commands will enable writing to /system:

Code:
adb kill-server
adb root
adb remount
Enjoy.
Note that the tablet is NOT rooted and that restarting it will bring you back to normal. You might decide that you do not need to root it any more at this stage. Otherwise you can use your full access to permanently root the tablet by hand.

PART 2: How root the tablet by hand

Install superSU from the Play Store with your tablet booted normally. It will complain about missing su binaries if you try to start it. We will fix that in the following.

On your computer, access the 805 MB system partition of the SD card (an ext4 filesystem, mounted from /dev/mmcblk0p7 on my Linux) and copy the su binary from the /xbin directory onto your computer (in the same directory where you have adb). Alternatively, get the su binary from any other source you trust.

Restart the tablet as in PART 1 and follow all the instructions to get rw on /system.
Run the following code in your shell (bash or CMD.exe):

Code:
adb push su /system/xbin/su
adb shell
chown 0:0 /system/xbin/su
chmod 6755 /system/xbin/su
ln -s /system/xbin/su /system/bin/su
adb reboot
Done, you are rooted. After restart, you can let superSU update the su binary and you are all set.

PS. I am not allowed to post links, I am too new here. I hope it is not an issue.
Last edited by roots-bloody-roots; 28th March 2015 at 06:59 PM.
28th March 2015, 07:16 PM |#60  
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I tried to make a new initlogo.rle using rgb2565.
I converted a png file to raw file first using:
Code:
convert -depth 16 initlogo.png rgb:initlogo.raw
followed by conversion with rgb2565.
Code:
rgb2565 < initlogo.raw > initlogo.rle
After including it into the bootimage, I eventually got the logo to be displayed at boot time. However the colors are off. I was wodering if anyone else have a similar experience and where is that I went wrong.
Last edited by roots-bloody-roots; 29th March 2015 at 01:25 AM.
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