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I just got the viewsonic g tablet. Ive followed several guides as to how to root it and get recovery on the device and flash a new rom, and I've failed completely and i think may have damaged my ability to get into any recovery. I believe i installed clockwork correctly v.8 correctly. I read that after you do that you can delete the folder called recovery and the existing update.zip so i did. I replaced the update.zip with the newest version of tnt lite 4.4 i believe. However every time i try to get into recovery it does not work. It turns on, says recovery key detected and then flashes a package for about 5 seconds, then boots up into the normal tablet os. It is as if every time i go into recovery or attempt to, it repeatedly installs clockwork recovery. So i feel at this point i cannot even get into any recovery whatsoever. I just tried a factory default erasure, but that this point i don't know if i altered the recovery to do that. If anyone could be so kidn as to help me out here and walk me through what im doing wrong or how you can save my ass i would be so greatful.....
Damn, I always hit thanks instead of reply, talk about bad GUI or blind clicker....
this is exactly what is hapening, you must have an update.zip in the root of the internal memory just to help you figure it out
sdcard = internal memory 16GB
sdcard2 = external card Whatever size you place
Try removing the sd card if you have one the update.zip could be there also...
either way try to figure it out, but you are definitely flashing a file, it's not a bug if I can say so... good luck!
Also this confirm you do not have clockwork installed but the original recovery (no menu, simply grab the update.zip and flash it!)
and read this again maybe
http://forum.xda-developers.com/showthread.php?t=1010943
heres the thing. I don't understand what is going on. when i put in my actual sd card. i cant get the file explorer to see it or reconize it for some reason. this is what is killing me, initally when i went into es file explorer it showed sd card and sd2 but later it wouldnt show up when i had an sd card in there. I appreciate your help, i really feel like im killing my tablet here. I had the update.zip on the internal memory or sd card as it reads, not on the actual sd card because i couldnt find the sd2 file system. what do i need to do again now that you know this?
this is the complete sotry of how i got to where i am ......... i first tried to installed zroot and failed. then i dloaded clockwork mod .8 for i believe sd and accidently put it on the internal sd and got confused. i did the power off then power and volume up. it then installed i guess clockwork. then i powered on, deleted the recovery folder and update.zip from the internal sd because a forum post said to since u didnt need it for clockwork. So i then dloaded a rom. then tried to go into clockwork but like i said it kept saying recovery key detected and flashed clockwork mod. and does that over and over. so i then added a recovery folder back with a text file that said command and a command line within that text file. and i dladed the most current stock rom and named it update.zip figuring that if i bring it back to normal i could start over. but everytime i would try to go into recovery it would just seem to flash clockwork. so now im very lost and have no idea how to fix this. ALL i want to do is have root access and flash a rom and I feel like i completely screwed this up and am at a loss.
1. Remove recovery folder and update zip from both sdcard and sdcard2.
2. Add the clockworkmod zip to the root of sdcard. (make sure you are using CWM for internal SDcard)
3. Using Esfile explorer extract the contents of the clockworkmod zip.
4. You should now have a new recovery folder and update zip on \sdcard.
5. Power off.
6. Power on holding the volume +.
7. CWM zip will be flashed. (should only take a few seconds) and then tab will boot normally.
8. Reboot into recovery and enjoy the CWM goodness.
P.S. All the custom ROMs come already rooted. No need to root ahead of time.
Duplicate instruction removed
thekafka,
First, read this info:
http://forum.xda-developers.com/showthread.php?t=1010943
If you indeed have a working ClockWorkMod, all you have to do
is copy the update.zip file to your /sdcard directory. The shut
down and start CWM using power / volume +. The use the
menus to tell it to load the update.zip and find the update.zip.
You don't have to have the recovery folder with CWM, but you
do need update.zip (you said in your summary you erased it!)
If this doesn't move you ahead enough to work, clarify what
you did this time and what happened and we'll look for Plan B
Rev
moral support...
There are far more expert posters on this forum than I. But I just thought I'd give you some moral support. Take deep breaths, and don't panic. The people here will help you through just about anything, and any missteps you might make. All of us, well, most of us, started out exactly where you are, and we are still great fans of the gtab. I have found that even I could not "brick" the tablet. And believe me, I have had moments of panic too. So, just read the various threads, carefully follow the steps, and just take your time. The gtablet is a great tablet.
Gtab Fixeration
Reggie777 said:
There are far more expert posters on this forum than I. But I just thought I'd give you some moral support. Take deep breaths, and don't panic. The people here will help you through just about anything, and any missteps you might make. All of us, well, most of us, started out exactly where you are, and we are still great fans of the gtab. I have found that even I could not "brick" the tablet. And believe me, I have had moments of panic too. So, just read the various threads, carefully follow the steps, and just take your time. The gtablet is a great tablet.
Click to expand...
Click to collapse
Bump for this kind fellow. I have in the span of a week taken my Gtab as close as it is possible to bricking, and managed to get it back into working condition with instructions from elsewhere on this forum.
The good news is that with a little elbow grease, and assuming that you don't break the hardware, you are just fine. The Tegra2 platform is hard to brick, and if all else fails you can use Nvflash to rebuild the partitions and write a stock image to flash. If you think you have done something really bad to your ROM, reverting to a stock image may be a reasonable next step.
-Buzzz
Read the install notes
For starters depending on what version of the OTA you are on 3588 etc.. on the TnT lite install in recommends that cwm not be used.
TNT Lite is an alternate 1.1 based ROM for the GTab, based on the stock ROM that Viewsonic supplies. This will flash system, bootloader and your kernel, so be aware of this. Clockworkmod is NOT recommended for use with TNT Lite flashing (as it does not update the bootloader as required by the vendor), but it is an option if you feel you must use it (ie. if you are stuck in a boot loop and need to wipe your user data). It is a "mostly stock" ROM.
Click to expand...
Click to collapse
You might need to read up a bit more or use an older version. I have bricked this tablet more than a few times. I use linux to nvflash and have nvflashed from 3991 back to 3588 and still been able to drop tnt lite 4.2 back on it.
You might need to read this a few times.. I keep reading the dang thing over and over...
http://forum.xda-developers.com/showthread.php?t=842004
Phone is a Star X19i
Now I'm looking at getting a system to allow me to back up the rom and re-flash if needed.
Post 4 has attachments of my boot, recovery and scatter files.
Old issue: (Solved)
Stupid thing I did I renamed the mtklockscreen.odex to mtklockscreen.odex1 just as a test in a half asleep phase to see if I would get the stock lockscreen loading.
Suffice to say the phone no longer boots.
Really don't think I can get into ADB and rename the file to get the phone booting again unless anyone knows a way.
Android was 2.3.6 and I asked the seller if it was possible to get the rom incase anything like happened which they didn't.
So anyone have any ideas?
I have attached the stock recovery and boot images made with cat and a scatter file I made to post 4.
As I have no idea about modifying these for hard root can anyone take a look?
I don't know the specifics of the phone, but if you can go into recovery mode maybe you can get adb working, or use a flashable zip to rename the file by installing it from recovery (just need to edit the zips' updater script)
dxppxd said:
I don't know the specifics of the phone, but if you can go into recovery mode maybe you can get adb working, or use a flashable zip to rename the file by installing it from recovery (just need to edit the zips' updater script)
Click to expand...
Click to collapse
I got into built in Factory mode and can see the file I renamed through ADB and android commander but cannot rename it back due to not having hard root access.
I also have a copy of the boot and recovery partitions 5 and 6 respectively I made in the adb shell yesterday as I was half looking at getting hard root access.
ren mtklockscreen.odex1 mtklockscreen.odex
ren: permission denied
I read you can do a custom recovery with root using SP Tools still so can anyone help me do this?
I know about system root etc and stuff and have flashed roms before on other tablets and have been a PC I.T tech (wouldn't think it due to the stupid mistake) but this recovery and scatter files etc is kinda new to me.
I have a scatter file now I just made if anyone is interested in helping me.
Yes I have a MTK6573 but the scatter file came from the MT6516 Rom Studio which I read works the same for the 6573.
Attached is also my stock boot and recovery partitions I made with cat yesterday if there usable to anyone to help.
Well I got it working and fixed.
I had to go into adb shell and su and mount the file system as writable, as I have used linux before I didn't know about android and what needed to be done and permission locks etc.
The stock boot, recovery and scatter files will remain on this thread if anyone wants to help create or find a recovery which can allow me to create backups and flash custom roms.
I may be able to provide a dump of android 2.3.6 for those that want it once I'm provided with a backup solution as I have read a few people wanting this updated android rom.
This got too close to what I would like liked with bricking this phone.
And I'm not comfortable unless I have a rom backup of this.
Rooting Advice: For anyone with a MTK6573 on Android 2.3.6 trying to root but having issues with super one click make sure you only turn on USB debugging after Android has loaded and just before you plug the usb cable in to run super one click.
I have seen a few thread and posters here about not being able to root the phone and this is the cause that debug needs to be switched on right before you connect and try to root.
Original seller has agreed to send the firmware and flashing stuff on cd for me so I can upload it for you all.
This is a win for MTK6573 Star X19i owners as I'll have the updated 2.3.6 Gingerbread firmware to release for you all root modify etc in a week or so.
Be careful with ROM studio. I believe it is not compatible with MT6573.
You want to read this: http://bm-smartphone-reviews.blogspot.com/2012_04_01_archive.html
cybermaus said:
Be careful with ROM studio. I believe it is not compatible with MT6573.
You want to read this: http://bm-smartphone-reviews.blogspot.com/2012_04_01_archive.html
Click to expand...
Click to collapse
That's what I read and did to get my scatter as I used cat then used the program linked in that thread to generate the scatter.
I got a nook tablet recently, i registerested it already which i understand you have to do... now i want to backup everything and run regular android as in not B&N version. Im not sure which way to go from here, i see there is an sd option and a regular option?
i was reading this
http://forum.xda-developers.com/showthread.php?t=1439630
as i was getting ready to do it, i started to double think if it was what i wanted.
i want to be able to run the latest android rom possible.
appreciate any help, thanks.
The process you are linking to is very simple and "safe". With the card you create you can startup CWM (ClockWorkMod - utility for flashing and backup and more) and not only root your device, but also make a backup, should you want to go back to where you were prior to flashing whwaever you decide to flash.
The rooting alone lets you install apps from other sources than BN. I think rooted stock tweaked a bit isn't too bad to run actually!
To try out other options completely risk free you can run CM10 (ICS) from an sd card. I do that while I wait for CM10 to be more stable/bug free. It runs incredibly well from sd, and I doubt performance will be greatly enhanced onec I install it internally (as I probably will do at som point.
To run from sd card you don't have to root the device unless you want to.
Great guides for making a sd-card are here and there. For example http://iamafanof.wordpress.com/2012/11/18/cm10-0-jellybean-sdcard-img-for-nook-tablet/
The first thing I would suggest is to make a bootable recovery SD card using the process and files from here (use the MLO_u-boot_flashing-boot.rar and one of the packages with sdcard.zip suffix), and backup your current stock config and safely save/archive the backup folder -- you'll be glad you have it around one of these days. Make sure that you also keep a copy of whichever recovery program version you choose to use together with the backup folder, since different recovery programs and versions use different backup file archive formats.
If you want to root the NT I would recommend using the update.zip referenced in this post (by liquidzoo) which is more up-to-date than the rooting package you saw (I had used the latter version and had problem updating its Google Store app). Just put this zip package on the same recovery SD card and use the recovery program to install it.
Having tried out the rooted form of the NT for about a week I think it's just marginally better than a stock NT -- there are just so many common apps that are no longer available for the NT's Android version. You would be much better of investing time in going full-fledge CM10, either running off an SD or natively. If you choose to go native CM10 you can revert back to stock using the backup discussed above.
Can you please verify if I am doing the correct thing
@digimax,
I just got my Nook Tablet today, so just wanted to be very clear to make the backup of the current stock config. Here's what I propose to do. Please correct me if I am doing anything wrong.
1) As per you post, I downloaded 3 files
a) MLO_u-boot_flashing-boot.rar,
b) CM9-10_CWM_V6.0.1.2_8-16gb_tools_sdcard.zip,
c) CM9-10_TWRP_v2.2.2.0_8-16gb_tools_sdcard.zip
2) Unzip all the above 3 files
3) Rename the CWM file to recovery.img
4) Rename the TWRP file to altboot.img
5) Copy recovery.img and altboot.img and MLO, flashing_boot.img and u-boot.bin to the root of the SDCard.
6) Insert the SDCard into the Nook Tablet and boot the Nook into one of the recovery and make a backup.
Please let me know if this is the correct procedure.
Thanks!
It looks right, make sure that your boot partition is Primary FAT32 (type 0x0C) with LBA and Active flags set (you can check and set all this using a partition management tool such as MiniToolPartition).
Also, to boot into SD: just turn off the NT and insert a powered-USB cable, and the NT will boot up after a few seconds (assuming that the SD is bootable).
Once CyanoBoot comes up, hold the "N" button to get the boot menu from which you can select one of the two recovery programs.
a lot of this is going way over my head, i need to make sure i go slow and read carefully.
thanks for all the info.
Snjperman said:
a lot of this is going way over my head, i need to make sure i go slow and read carefully.
.
Click to expand...
Click to collapse
Remember that you can make CM10 run totally risk free from am SD-card. That way you can have a smooth running device to explore while you keep reading up on diffrent options. That's what I do! The Tablet doesn't even have to be rooted to do this (mine is though).
asawi said:
Remember that you can make CM10 run totally risk free from am SD-card. That way you can have a smooth running device to explore while you keep reading up on diffrent options. That's what I do! The Tablet doesn't even have to be rooted to do this (mine is though).
Click to expand...
Click to collapse
thats exactly what i want to do, can you link me to the tut you used?
thanks!
Snjperman said:
thats exactly what i want to do, can you link me to the tut you used?
thanks!
Click to expand...
Click to collapse
This is the website I used:
http://iamafanof.wordpress.com/2012/11/18/cm10-0-jellybean-sdcard-img-for-nook-tablet/
Look through the comment sections for further clarity on the process.
If that is beyond you, then I suggest getting a pre-made image for the size of SDCard you have and burning your own image. Google AndroidforNook or N2A for the website links.
Snjperman said:
thats exactly what i want to do, can you link me to the tut you used?
thanks!
Click to expand...
Click to collapse
To install and run CM10 off SD card: http://forum.xda-developers.com/showpost.php?p=35245689&postcount=7
To install and run CM10 internally on NT: http://forum.xda-developers.com/showpost.php?p=35669871&postcount=1
attiato year
thank you guys so much!
Dear Admins,
Could we get a forum setup for the Cube U27GT WiFi version? I dug around on the site a bit beforehand but didn't see one, I apologize if I missed it and please direct me there if I did.
I have this tablet and I am doing some initial basic firmware development for it and want a proper place to start putting threads.
Dear Dev Community,
I can't root this bloody thing... At least, not the rom itself. Let me explain...
I can flash the stock rom from Cube and that can be rooted using Kango Root. --Fine...
However, I can't figure out how to replicate this when I make my own rom.
Thus far, here is what I have attempted...
1. Setup dsixda's excellent kitchen on my Ubuntu workstation.
2. Unpack the rom, clean things up, manually put the boot image into the dsixda unpacked working rom folder, run dsixda's root functionality (which add SU binary to xbin and SuperSu apk file to app folder as well as do some things with the boot image file).
3. Rather than using repack with Dsixda (which makes an update.zip image which I can't use because the stock recovery environment on this device can't flash zip update files and I can't for the life of me figure out how to get and or make a working CWM or TWRP recovery image for this unit)...
4. What I do is I run commands in linux to unpack the stock rom to another directory and mount that directory, then clear out a bunch of folders and then manually copy in my files from dsixda's working folder, then repackage up my unpacked stock rom into a new system.img file.
5. Then copy my now modified boot image, system image, and also userdata image (I modify that as well as that is where most all of the chinese bloatware is loaded from) to my SP_Flash_Tool, generate new checksum.ini file and flash normally...
What I get as a result...
1. As long as I am really careful with how I copy files into my new image, the new system flashes okay (if I am not careful, after flash USB storage for some reason has a format error and the system will boot but can't mount USB storage and other odd issues ensue as a result).
2. Assuming everything flashes okay, and no issue with USB storage partition, I have SuperSU installed and when I go to use an app (ES File Explorer or Root Checker) that require's root, I do get the prompt. However none of the root functions actually work and Root Checker tells me I am not rooted.
That is as far as I have got. So as a result, I have a really nice, westernized, cleaned up rom but with no root.
Anyone have any ideas?
This is my first adventure into mod'ing MTK roms so I am sure I am doing all kinds of things wrong . I had a good bit of experience on Rockchip SoC's before this though.
Kind regards and thanks in advance!
Roman
Figured it out!
So I finally did the following rather hackish work-around...
1. Flash stock firmware...
2. Root with Kingo Root
3. Enabled ADB
4. Attach to PC and fire up MTK Droid Tools
5. Take a full backup
6. Modify the system image from the backup and make changes
7. Put that in new firmware flash package
8. Flash new firmware
YAY - Cleaned up rom, modified, with root!
Once I get it all packaged up and uploaded to mtkfirmware.com I will post a link for anyone that wants a cleaned up rom with root!
The only downfall of the above method is that it absolutely requires that the developer have a device on hand because you can't just root the stock image file (at least, I couldn't figure out how... - bleh...
Kind Regards,
Roman
Dear roman,
Thanks for your hard work.
I have a simple question (I think) and if you have the time to reply or -any other android guru- I would be thankful.
My later issue was with a U27GT cube tablet, but I have others, one for each kid, and this is more of general question.
I am reading this and other forums about how to flash tablets from PC. My question is:
Can the flashing process be done from a SD card?
Thanks a lot and regards,
Fernando
SKorea
My details are listed in this thread here- http://forum.xda-developers.com/general/xda-assist/softbrick-recovery-backups-available-t3345505
I have since learned how to get a logcat and dmesg file out into a text.log format. I have put the file up on Google drive, the link is here-
https://drive.google.com/file/d/0B9eV5dTDDCsPZUtSWU14eHBlMms/view?usp=sharing
I am hoping someone can assist with interpreting the log file or provide suggestions on how to convert my backups into a usable format that can be flashed back to the phone thus recovering it to a usable state. Many thanks for your advice!