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Hi all,
I need your help with the following tablet 9" GT90H with Allview A23 CPU/ chipset and android 4.2. I want to backup the ROM, to perform few modifications and to upload the modified image to the tablet, but I am stuck on the first phase (cannot dump the rom).
I tried several ways to do it (actually that I found) to dump/ backup the stock ROM but I was stuck on all of them. First I tried using the clockwork way, but unfortunately my tablet is not supported (and I could not find supported MOD). Then I tried with romdump, but unfortunately I was stuck because the tablet does not have /proc/mnt file. Finally I found a way using the rkdump method but I had non recognize image error (although I am not sure if I found the correct partition to back up - /dev/block/by-name/recovery ). I have doubts if this is the correct partition, because I did a binary copy using dd to a file, which ended up with size around 32 MB (which I found too small for a recovery image).
So that is why I decided to seek help from more advance users (this is my first tablet, and first android experience) and I believe this forum is the right place for that.
My first request is could someone guide how to make a proper ROM backup, that I would be able to restore later?
In addition I want to ask is it possible, once I backed up the ROM, to modify for example the home page (because on the current ROM the home page for all browsers that I install is http://www.baidu.com)?
Moreover I would like to to install the ROM on external memory card and to run the tablet from there (because the internal memory of this table is too low - 8GB but for the system partition I have only 500 mb, which are all occupied with pre installed software). Is this something that I can achieve (android as far as I know is *unix system, and in theory this should be possible)?
Thank you in advance.
For increase space you can use Terminal Emulator for market and must have root on tablet.
Open terminal , and run the commands :
pm get-install-location (this will show you where apps are installing in this moment)
Auto device install is 0 (the tablet chose auto where to install apps,usuale is chosing to internal memory,your 500mb )
internal memory is 1 (Tablet memory - your 500mb )
External memory is 2 this is where you want to instal apps - (your 8GB )
After run the comand and see the sistem is set to AUTO (0) you will run this :
pm set-install-location 2 - This will force apps to instal in your 8gb
to check if is ok , run again : pm-get-install-location
exit terminal emulator
Good luck ! Hope it help you
Problem with my GT90H
Hey Guys,
I have a Problem with my GT90H. It stops to boot at the screen: Tablet PC - Keep Moving Forward.
If i go in the recovery mode. I can reboot the system, but it stops at the same screen like I explained in my first sentence.
The Factory Reset doesn't work. So I read in some communitys that Tablets can be flashed with a new ROM (Android System) over the USB Port from the Computer.
So can anybody send me the Android 4.2.2 Image for my GT90H ?
It's very important. So thanks.
Thanks for your help.
Greetings from
TheGuardianTX
Hi,
so now I have an Firmware as an Image-File at my computer, but I don't know how I can flash my tablet via ADB.
So can someone help me ?
Thanks a lot.
Greetings
TheGuardianTX
I've done the dump of my K-R42 (MK888B, 2GB Ram 8GB Rom Quad Core RK3188 Cortex A9 Full HD Multi Media Player Android TV Box MK888 K-R42 CS918 EKB311B) with RK Rom Dumper and Flasher for Windows, updated firmware successfully but wanted to go back to my old firmware. I can't do it as Rom Flasher Tool 1.37 reads "systemFile is not existed". The same about userdata. These files ARE in the output folder. Actually all the files (images) were done successfully except for metadata as it was not there during dumping. I did flashing without those images and Flasher tool read ERROR: Download file failed. Now I can't load the Android system. Penguins appear and that's it. It does not go any further. More over, the PC does not recognize the device. How shall I revive the device? Please help
Hey everybody!!! I was just wondering to myself, is it possible that someone out there will make an android recovery which will work just like the actual operating system?
I mean that when you would boot into recovery - you will see a homescreen with apps you can tap on and open - just like android.
Soooooo is it possible? And if it is - is there anyone out ther willing to do it? Because it will be awesome!!!!!!!!!!! ( i know it's like dual boot, but it's cooler!!!!)
because the partition of recovery is too small, we can't put full features os like android into recovery partition
Sent from my Redmi 2 using Tapatalk
Maybe with root rights you can change that partition? I'm nearly 100% sure it's possible
The recovery is already a separate operating system. However it's not Android - as other users have pointed out, there is no space for a second Android system on a normal device.
Most devices have two boot images that each contain a Linux kernel and a ramdisk image - one boot image for Android, one for the recovery. The bulk of the Android OS is on a separate /system partition. Recovery runs fully from the ramdisk.
If you have a storage device (like a microSD card) with additional free space, then it is possible to create separate /system and /data partitions there for a second independent OS. You could use the recovery boot image to boot that OS, but you may still need a recovery, so you'd need to add some code in your secondary boot image to switch between recovery and your secondary OS.
So... is it possible? Yes. Will I do it? No.
Thanks for the answer and clarification!!!
And if you could help me a bit more: do you know of some kind of dual - boot development project which has already been started for the gs5? I have a micro sd card and am flabberghasted by the idea of two OSs on one device. Thanks!!!
You can try this http://forum.xda-developers.com/showthread.php?t=2447534
Thanks!
I'm badly need some expert advise.
.My china clone without name (rockchip-rk31sdk-WAWJMDN1KN).I decide to go ahead and try some custom rom using RKAndroidTool.
I did not realize that by cleaning IDB I will low level format..Before doing that I did save few pictures and run log via "android studio" also I backup whole unit via CWM hoping I will always have access to recovery.Unfortunately that not the case.The good think I still have access to RKAndroidTool( the tool is recognizing my device).There is the link to my CWM backup if may help
https://mega.nz/#!g8YgVKaa!209scxKfT...lRZ454peCCCsgU
https://mega.nz/#!gwRGhC7B!KFvTGpp4x...M2AHOKjT43VPQI
Inside that CWM backup is kernel.bin, system.bin recovery bin all
large sizes files (complete CWM of my last working tablet rk3188). Please ask me for pass to open 2x rar.
Maybe You will be able to advice me how to make proper files to revive my system from that backup I have, or help me some how to get CWM recovery working so I can use my CWM backup or any other way to make this tab back to life again.
Perhaps someone will give me idea to allocate proper parameter for recovery , kernel , boot , etc...
Usual location for tablet RK3188 Cortex A9 Quad core 1.6 ghz Governor interactive, Kernel 3.0.36+ ,Board hardware RK30Board/ 0000, Android 4.2.2 ;eng.root 20130912.185132 sdk 17, Display 1280x800; dpi;160 size 9.4'
GPU:Mali-400MP, RAM: 2048 Flash:32 gb Build in:16gb actual, wifi, usb, Bluetooth gps= all yes, camer 5MP additional 1.9MP.
Many thanks for your kindness and time.
Adam
styropian said:
I'm badly need some expert advise.
.My china clone without name (rockchip-rk31sdk-WAWJMDN1KN).I decide to go ahead and try some custom rom using RKAndroidTool.
I did not realize that by cleaning IDB I will low level format..Before doing that I did save few pictures and run log via "android studio" also I backup whole unit via CWM hoping I will always have access to recovery.Unfortunately that not the case.The good think I still have access to RKAndroidTool( the tool is recognizing my device).There is the link to my CWM backup if may help
https://mega.nz/#!g8YgVKaa!209scxKfT...lRZ454peCCCsgU
https://mega.nz/#!gwRGhC7B!KFvTGpp4x...M2AHOKjT43VPQI
Inside that CWM backup is kernel.bin, system.bin recovery bin all
large sizes files (complete CWM of my last working tablet rk3188). Please ask me for pass to open 2x rar.
Maybe You will be able to advice me how to make proper files to revive my system from that backup I have, or help me some how to get CWM recovery working so I can use my CWM backup or any other way to make this tab back to life again.
Perhaps someone will give me idea to allocate proper parameter for recovery , kernel , boot , etc...
Usual location for tablet RK3188 Cortex A9 Quad core 1.6 ghz Governor interactive, Kernel 3.0.36+ ,Board hardware RK30Board/ 0000, Android 4.2.2 ;eng.root 20130912.185132 sdk 17, Display 1280x800; dpi;160 size 9.4'
GPU:Mali-400MP, RAM: 2048 Flash:32 gb Build in:16gb actual, wifi, usb, Bluetooth gps= all yes, camer 5MP additional 1.9MP.
Many thanks for your kindness and time.
Adam
Click to expand...
Click to collapse
UPDATE____
RK3188 adb is running no screen__help PLEASE
After erasing IDB in my unknown china tablet and loosing my whole system I was able to load different custom firmware from Chuwi v88 + different kernel and my Tab popup in windows showing 2 extra drives F and G.I did open android studio and notice access to adb and all activity in my android.The RKandroidTool also recognizing my tab.
No reaction to power button only automatically connecting to my comp ( black screen on my tab).
I have original CWM backup of my device.
Can someone advise me how to access recovery from this point or find the way to completely start my tablet.Maybe is possible to recover CWM from adb?I will need some help to use a proper commands perhaps in adb.
Team Win Recovery Project, or twrp for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.
Version Information
Status: Unstable
Created: 2016-09-04
Last Updated: 2016-09-04
DOWNLOAD: https://mega.nz/#F!ZsxV0CrB!vsR6rdmZkpI9HShdPxybog
HOW TO USE (INSTALL FREE):
1. Rename the img file you uploaded to "recovery.img"
2. Put the file on USB stick
3. Put USB stick on the S905X device
4. Open recovery like you normally do
TESTED DEVICES:
Mini M8S II - Worked perfectly
IMPORTANT:
You have to use USB mouse to have input.
You can remove USB stick after opening TWRP.
VirusTotal:
twrp.s905x-3.0.2-0.img - https://www.virustotal.com/en/file/54f14e348747039ec63888f03f15bd8aa529cc92e413ac82f9fd3ee008ecd241/analysis/1472972666/
Is valid for Nexbox A95X 2Gb / 16Gb?
oskarbcn said:
Is valid for Nexbox A95X 2Gb / 16Gb?
Click to expand...
Click to collapse
Would like to know this also.
Invalid for M96X.
Caused me massive problem as there was no way for custom recovery to read onboard storage.
Had to dump original recovery from the depths of hell to restore it back to stock.
In case anyone's looking for it: stock recovery image for M96X S905X 2gb RAM, 8GB ROM
flash with RASHR app (through android)
seven2099 said:
Invalid for M96X.
Caused me massive problem as there was no way for custom recovery to read onboard storage.
Had to dump original recovery from the depths of hell to restore it back to stock.
In case anyone's looking for it: stock recovery image for M96X S905X 2gb RAM, 8GB ROM
flash with RASHR app (through android)
Click to expand...
Click to collapse
I have an m96x and t95x pro. I am basically just trying to figure out a way to make a nandroid backup and a restore method. Does these two devices simply have no compatible custom recovery to make a nandroid backup and restore?
ftateen said:
I have an m96x and t95x pro. I am basically just trying to figure out a way to make a nandroid backup and a restore method. Does these two devices simply have no compatible custom recovery to make a nandroid backup and restore?
Click to expand...
Click to collapse
No one has made a compatible custom recovery for the M96X.
However restoring is easy as pie if you have the right firmware. I have it backed up and am about to restore a bricked box.
seven2099 said:
No one has made a compatible custom recovery for the M96X.
However restoring is easy as pie if you have the right firmware. I have it backed up and am about to restore a bricked box.
Click to expand...
Click to collapse
may i have a copy? cant find the firmware anywhere....
redgrass83 said:
may i have a copy? cant find the firmware anywhere....
Click to expand...
Click to collapse
edit
please ? I have two of these wedge bricks
Could I request a version compiled with TW_THEME := landscape_hdpi? I have trouble reading the terminal text when it's so pixelated.
seven2099 said:
No one has made a compatible custom recovery for the M96X.
However restoring is easy as pie if you have the right firmware. I have it backed up and am about to restore a bricked box.
Click to expand...
Click to collapse
Steve please help me. i came across your post on google. i bricked my m96x by editing build.prop and now its stuck on startup screen where it says box something . i downloaded all your 3 files you provided but did not understand how to flash it.
can you please explain why there is 3 img zips instead of just 1 . also can you tell me how to flash and fix my m96x box.
thank you
Installed in Zenopllige Z11 PRO, it works. I flashed it with the video application https://www.youtube.com/watch?v=UZMS8qYs2tQ
Unable to Restore TWRP Backup on Mini M8S II
Hi,
Bought this Box few days ago and now found several issues, one that bothered me the most was the dark screen (have read several forums where people complained about this issue). There are no options to increase or decrease the brightness. Anways I wanted to flash another firmware/update to see if the issue will resolve so I made a TWRP Backup using the UNOFFICIAL TWRP 3.0.2-0 Recovery Image for S905X which went smoothly but now I am trying to restore the device and all I get is errors every time I try.
TWRP Restore Error:
Error during restore process.
extractTarFork () process ended with ERROR: 255
Pls can someone help me to restore the TWRP backup on this crappy Box.
Thanks
Can I use it for a M9C Pro Smart Amlogic S905X TV Box? Thanks
Someone tried this on M96X-II? It seems to be M96X with 16 GB NAND memory chip.
robinkooli said:
Team Win Recovery Project, or twrp for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.
Version Information
Status: Unstable
Created: 2016-09-04
Last Updated: 2016-09-04
DOWNLOAD: https://mega.nz/#F!ZsxV0CrB!vsR6rdmZkpI9HShdPxybog
HOW TO USE (INSTALL FREE):
1. Rename the img file you uploaded to "recovery.img"
2. Put the file on USB stick
3. Put USB stick on the S905X device
4. Open recovery like you normally do
TESTED DEVICES:
Mini M8S II - Worked perfectly
IMPORTANT:
You have to use USB mouse to have input.
You can remove USB stick after opening TWRP.
Click to expand...
Click to collapse
Why you ppl posting link then deleting file!!!! I have mine threads they are 15 years old and links are still live...You guys just waste forum space