[Q] CWM recovery boot loop - Android Q&A, Help & Troubleshooting

I attempted to root a denver tac-70061 tablet in order to be able to switch the mounting of the internal and the external sdcards. I have only rooted once before; a denver tac-70031 tablet which was extremely easy to root by simply installing and running the superuser app. Unfortunately, it seemed that it was not as simple on the 70061.
As I am a novice, I followed the instructions blindly and read them through a number of times before attempting.
I followed a set of instructions which described downloading a zip file which contained adb for windows and some img and zip files to transfer to the sdcard.
I am using ubuntu, so I assumed that the adb which was installed along with android sdk would suffice.
I copied the required files to the root of the tablet's internal sd card and installed recovery via adb.
I unplugged the tablet and rebooted in recovery holding down volume-up while powering on.
When in recovery, the instructions told me to install superuser 3.1.3.zip from the sdcard but this file was not present.
When selecting 'reboot', the tablet kept rebooting to recovery and now seems to be stuck in a loop.
I hope that someone can help.

Factory Default reset?
How do you even get into the recovery menu. W/o I try, I get to the screen with the stupid robot laying down, and a ! inside a triangle showing. What buttons do you press to open recovery menu? On that page, no lists of stuff appear, and I want to reset the android tablet I used, also a TAC-70061, b/c it just keeps loading on the 3rd boot screen, and never gets passed it. Lame Denver product is not worth 2 cents. Apart from how annoyed I am, can you explain to me how to get into the factory reset and reset it/fix it?

Related

[Q] Bricked G-Tab?

Could I have bricked my tablet? Or could there be a way to recover?
As for what it's current state is; (I am sure is is stuck in the reboot loop) When powering on the tablet, it displays "Android", goes dark, and repeats. Though this is a change from when I was trying to fix it on my own. Before it looping, it would show the "Android" screen and just sit there.
No comes what I think the REAL issue is... Running 'ClockworkMod v2.5.1.1-bekit-0.8', I am unable to mount an external SDcard or mount the USB Storage(text in menu implies to me it is the USB cable to computer).
So other than the images already on the tablet, I seem to be unable to get a new image into it. And of course the images on it don't do any good.
Tech1381 said:
Could I have bricked my tablet? Or could there be a way to recover?
As for what it's current state is; (I am sure is is stuck in the reboot loop) When powering on the tablet, it displays "Android", goes dark, and repeats. Though this is a change from when I was trying to fix it on my own. Before it looping, it would show the "Android" screen and just sit there.
No comes what I think the REAL issue is... Running 'ClockworkMod v2.5.1.1-bekit-0.8', I am unable to mount an external SDcard or mount the USB Storage(text in menu implies to me it is the USB cable to computer).
So other than the images already on the tablet, I seem to be unable to get a new image into it. And of course the images on it don't do any good.
Click to expand...
Click to collapse
Most definitely not bricked. I've recovered from a much worse situation (bootloader wouldn't even budge - couldn't boot into recovery or regular at all).
Since you are able to boot into recovery, there's probably a way to get things working without resorting to nvflash (we'll get to that in a second - nvflash is the failsafe mechanism, and you should be able to re-nvflash your tablet back to its original state if all else fails).
Here's roughly what I'd try in order:
Option 1) Figure out why you are unable to mount as USB in recovery. I've actually never heard of this problem. Are you using the right cable - i.e. a working USB-to-mini-USB cable (I don't think this works at all with the full sized USB port under the latch cover). Have you tried it with another computer - perhaps there's a driver issue on your PC?
Option 2) If for some reason you really aren't able to get USB mounting working in recovery (I'm skeptical - again, I've never heard of that problem - unless you really did flash a bum recovery image or something - but seems unlikely), then I'd see if you can get ADB working properly when you are in recovery mode. Search around and read about setting up ADB if you haven't already - just a matter of getting the right driver installed on your PC and installing the binary stuff (either from the full Android SDK or one of the packages that just has the ADB stuff floating around). Search the forums, you'll find some references to help you get this working and download the right stuff.
If ADB works, you can always use "adb push filetoflash.zip /sdcard/filetoflash.zip" to put a new file on your internal SD card area and flash it.
Option 3) You can always use nvflash. I'm not going to write up a tutorial on it here - search the forums for nvflash, there are several HOWTOs. Look for the stuff Roebeet posted. You'll need to install the APX driver on your PC first before this will work, and Roebeet's posts don't explain how to install it on Windows, so you'll need to search separately for that. I have gotten this to work before, but it's a pain and I only recommend it if your recovery image is truly trashed or your bootloader is malfunctioning as mine was. In other words, don't bother until you've exhausted the first two options.
So in short - you are in a pain-in-the-ass situation, but you have by no means bricked your tablet - it is very, very far from bricked. Give us more info on *exactly* what happens when you try to "mount as USB" while you have your mini USB cable plugged into the G Tablet - do you see a drive appear on your PC? Are you running a Windows box? Mac? Linux? Have you verified that a USB keychain drive works fine with your PC but the G Tablet won't mount? Basically we need some more info to guide you in your search.
Ok finally had some free time from cleaning/packing and house hunting to try fixing the tablet.
Good news is that I was able to mount the USB. I didn't notice the cat nibble on my cable... So once I dug a spare out, I was able to copy a TnT-Lite image (still had on computer) onto it right quick. Restarted and it installed the image.
So now it has TnT-Lite, though it is weirdly stuck on the setup wizard. It tells me to touch the android to continue and shows an animation of a hand touching the android. But when I touch the android, it turns white and thats it. Also I can change the language to UK or American English. Plus when I press the menu button, I can go to wireless settings, as in cell phone wireless settings. Lastly, I can make an emergency call. So new worthless image. YEY!
I next tried to reboot back into ClockworkMod to see what I could possibly do to get by the lack of continuation in the TnT. But the image install did something interesting. When trying to enter Clockwork Mod, here is what it does from powerup: Displays "Detect a recovery key pressed" then on the next line "Booting recovery kernel image", blanks the screen and then displays "Android" for a few seconds, lastly switching to an exclamation mark in a triangle and rebooting.
So how do I go about screwing it up more?
Tech1381 said:
I next tried to reboot back into ClockworkMod to see what I could possibly do to get by the lack of continuation in the TnT. But the image install did something interesting. When trying to enter Clockwork Mod, here is what it does from powerup: Displays "Detect a recovery key pressed" then on the next line "Booting recovery kernel image", blanks the screen and then displays "Android" for a few seconds, lastly switching to an exclamation mark in a triangle and rebooting.
)
Click to expand...
Click to collapse
CWM is not installed
flash the latest firmware using stock recovery
read read read
http://forum.xda-developers.com/showthread.php?t=892090
It almost sounds like you now have stock recovery in your Gtab.
If that's the case, then maybe copy a stock TNT update.zip onto the external Sdcard, and create recovery/command file on there with the string for SDCARD2, then reboot w power and volume+. If you do have stock recovery, that should flash it back to stick TNT. Try Stock TNT 3452, since that'll also flash a stock recovery for sure.
Jim
Looks like Brian and I crossposted each other .
For the recovery/command file on the external SDCARD, put the following text in it:
--update_package=SDCARD2:/update.zip
NOTE THE 2 DASHES AT BEGINNING OF THE LINE...
Jim
No really, I've Bricked It
So, G Tablet arrived about 5 hours ago. I got it rooted and tried to install CMod 8.1. Things went wrong but I'm not sure what. Anyway, the last thing that I did was to boot in Recovery and then I selected, Format System. Now, when the tablet is turned on, in the top right corner, I have a tiny red message, Magic Value Mismatch. I get this message whether the SD card is installed or not.
I know this information is a little vague but as a Nod, it's all that I have.
f3justusc said:
So, G Tablet arrived about 5 hours ago. I got it rooted and tried to install CMod 8.1. Things went wrong but I'm not sure what. Anyway, the last thing that I did was to boot in Recovery and then I selected, Format System. Now, when the tablet is turned on, in the top right corner, I have a tiny red message, Magic Value Mismatch. I get this message whether the SD card is installed or not.
I know this information is a little vague but as a Nod, it's all that I have.
Click to expand...
Click to collapse
I'm freaking out, I think I bricked it...
I'm only getting the black android screen, I can't seem to mount USB, suggestions?
Ive been stuck right where you are a few times, not to big of a deal, just NVFlash back and start over. I am assuming you are getting the black screen you mention is the APX mode one you get by starting your tab by pressing vol down and power at the same time.

Clockwork Mod Won't Open, Help!

Hi.
I was installing Clockwork Mod externally onto my Viewsonic G Tablet. It started to install and was taking awhile I left the room and when I came back the tablet was off. I turned it back on and now my tablet won't go into recovery mod. It opens just fine, but I can't get it to open into recovery mod or Clockwork Mod. Just freezes up when every I power and +.
How can I fix Clockwork Mod or remove Clockwork Mod?
X that. I thought I would give a factory reset a try. So I went into settings and factory reset the thing. Well it restarted and when it got to the viewsonic birds it says "booting recovery kernal image" and never change. I have some how bricked the unbrickable G Tablet. Only my luck. Murphy's Law.
No you haven't. Factory reset uses recovery mode to perform it's operation so if ClockworkMod didn't install properly it will just hang. You need to nvflash a good recovery partition image onto the tablet then the factory reset will be able to complete and things should be fine.
NVflash back to stock and start over.
Does Nvflash give any indication that it's working? I'm trying to load Clockworkmod after dorking it up with Rom Manager, and I get
"Nvflash started" and a blinking cursor on the next line as a result. I can't tell if it's doing anything, or just sitting there.
Edit: 2 hours later when I gave up, it did detect when I unplugged the USB cable.
K J Rad said:
No you haven't. Factory reset uses recovery mode to perform it's operation so if ClockworkMod didn't install properly it will just hang. You need to nvflash a good recovery partition image onto the tablet then the factory reset will be able to complete and things should be fine.
Click to expand...
Click to collapse
How do I do this? I did the nvflash, then the factory reset, installed clockwork, when I try to start in cw mode, it still says "booting recovery kernel image" under "detect a recovery key pressed", then has the update looking box, then boots right into stock rom. Please help!!!
EDIT: I think I got this figured out by following the instructions here (In case anyone else has this problem).
http://forum.xda-developers.com/showthread.php?t=1058649
Nvflash should give you plenty of feedback in the dos shell or terminal window you're running it in. If you aren't getting any then it isn't working properly. That could be a driver issue under windows or possibly the tablet not being in APX mode when you start the process.

[Fixed] Long post, short question on CWM/TWRP

I'll put the question first for those not wanting to read the details.
I cannot get into CWM (internal) on my 16GB nook tablet. I can boot to CWM (external), but nothing works. When I try to activate ANY menu option, it takes me to a blank screen with the CWM hat logo in the background. Pressing power returns me to the main menu. Not even "reboot device" works. Can someone help? (I want to do a backup before i flash a JB Rom (internal), and to flash a JB Rom)
Now the long part:
I purchased and rooted my NT in December 2011 (about the 21st) using the snowball root (incase you are not familiar, as I don't see any post about it now, it was a modified zerg root borrowed from Albert's root method that with one menu option allowed rooting, recovery, and removal of certain nook apps and the addition of your choice of three launchers). I used it successfully on three nooks within a month or so, but this is the only one I did the complete nook removal option to.
Root works fine, but debug does not. When I run the NT hidden settings app to turn on debug mode, the developer options are listed twice (one compete set followed by another), this did not happen until after rooting, before they were only listed once. The bottom set was correctly checked to allow debug mode, and its how I rooted; however titanium backup says debug is not enabled every time I load it. (No complaints from RTB Pro) So I go into the developer settings and found two sets, the top one not checked... When I check it I get the pop-up warning, if I uncheck the bottom one, then debug does not work, if I check the bottom one I don't get the pop-up warning. With both checked, adb works, otherwise it does not. It had been this was since December 2011, and has not really prevented me from doing anything, although as the pop-up warns somethings may not work (converting apps to/from system, merging system app updates, restoring system app backups) and cause titanium to hang, but after a manual force close of titanium, most of the time the change was successfully completed.
Now, moving on one day I was being up my phone and thought "I can't remember the last time I did a nandroid of my nook" so I used RTB to reboot into recovery, the nook booted right back up into android, no errors, no different screen than a normal boot (with the nook --> hack logo, which incidentally takes about 12 minutes to boot every time, not sure if that is normal). So I tried an adb reboot recovery, but adb said no devices were attached. I went back into NT hidden settings and due enough debug was unchecked on the top, but still checked on the bottom (I've learned it lose it every reboot), do I rechecked it, got the pop-up, and went on my way. Adb reboot recovery also restarted my nook back into the OS, not into CWM.
I started to think that I may never have installed CWM, so I checked the root package I downloaded and viewed the script, first thing it does its copy the recovery image to the device, even before rooting, then installs it right after rebooting, post root hack. I thought maybe the posh was bad flash, so I searched XDA, downloaded a newer CWM, and manually adb pushed it to the phone and dd it per the instructions in the XDA thread. Reboot recovery, still nothing.
Please note I CAN get the factory reset screen to show up, but really don't want to try it without a backup, as I've been using my nook like this for 12 months and only have a titanium backup of the apps.
So I made a CWM SD from the NT thread here on XDA and booted to it :-/ intending on flashing 6.0.12 CWM to the internal emmc, the recovery on the SD was 5 something and none of the menu options worked, as mentioned above pressing power while any are selected gives a new screen with the background image, but no options. Pressing power again takes me to the main screen (same thing when selecting reboot device).
So I found a newer CWM SD package on XDA and swapped them out, this time a newer version 5.5.x, no change in how it works, so downloaded 6.0.12 and renamed the recovery image file and booted the SD. Small change this time (beyond the new version number and the option to power off, which also does nothing), when pressing the power button to select a menu option, the screen refreshes, but continues to display the same menu choices for all options in the menu.
I have also tried pushing each of these recovery images to the device and using adb to dd them to the recovery partition. Three nook will only boot the SD clockwork image.
Yes I made sure to select internal images for dd to the nook and external images for the SD.
So last night I installed nook tab recovery flasher, it said it successfully installed, before I clicked yes to allow it root access... the pressed the reboot recovery button, no good. So I downloaded and installed goo manager from the market and had it flash TWRP, same thing, reboot recovery ignores it.
Now to repeat my question, anyone have any clue how I can get recovery working spp I can make a nandroid and flash a JB Rom? (I know I can make a backup using adb, and Iam pulling one now, but I am wanting a recovery (that works) on my nook.)
Also, I am willing to try an adb push install of the Rom, I think I can make it work (although Ihave never tried it, on any device, I might be able to do it without further help), but I do not see how a new Rom will make any difference on my recovery situation and if I screw up, it would be comforting to know I had a working recovery at least.
Sent from my VS920 4G using Tapatalk 2
For selecting an option in recovery is N button not power one
Sent from my Xperia S using my fingers to swype.
Your question belongs in Q&A with all other questions and not in development. Only work being shared belongs there.
Thanks
AvRS
Caught that, and was able to flash CWM 6.1.15 (emmc) from the SD; but still cannot get to it.
Power+ nook= regular boot
Power+ vol up+N= regular boot
Power+ vol up= regular boot
Power+ vol down+N= regular boot
Rom toolbox pro reboot recovery = regular boot
Adb reboot recovery= regular boot
However, using goo manager to reboot recovery works, sort of...
I get the cyanoboot screen, hold N, use the menu to get to emmc internal recovery and I get CWM.
Now the problem starts about 3-7 minutes later (have not tried timing it, but it seems to be the exact same length of time each time), the nook reboots, don't matter what I am doing, using it, creating a nandroid, adb push or adb pull out apparently flashing cm10...
I decided to try a flash of cm 10 from a 11-28 build with multi touch firmware for 10 points. All was good, but I had to step away for about 2 minutes... I sneaked a peek and all was well, then when I got back my nook was on the "read forever" logo and has now been that way for 20 minutes. I checked the updater script in the Rom and it does NOT have a reboot command at the end.
I'll give it another 20 before ring to get back to CWM with out goo manager...
Sent from my VS920 4G using Tapatalk 2
Update
So, no change. Hiding the power button shut it off, I also tried plugging the usb cable in to activate boot, this causes a regular boot, which at this tinge never gets to "nook" but stays on "n" "read forever" which makes me laugh as it is currently the only thing I will "read forever" until I fix it.
Next up is to try to flash from an SD.
Update to my update
Booted from the SD, wiped everything three times, flashed the Rom, rebooted and ended up with TWRP, multi-touch and JB. Reinstalling apps through the market now, hoping previous issues are gone.

[Q] DOPO d7020 stuck in loop with mysterious issues

I bought this tablet exactly a year ago, never modified or rooted it, and suddenly a lot of apps started having issues. Went to reinsall a few of them then suddenly the whole OS froze.
Rebooted and the Dopo splash would show, then the android logo showing movement like it is trying to boot but gets stuck there.
Tried going into recovery by holding the power and volume button, that *worked* but when selecting factory reset then it crashed again.
So I repeated the process and now it won't even boot into recovery using the power and volume button!
Tried running the battery dead and restarting, tried using the reset button pinhole. Nothing worked.
I installed adb and fastboot (I use linux) and went through most of the simpler procedures.
adb connects and I can run its shell and view my files that are on the tablets. Ran the command to see its debugging output and noticed that the boot loop was because the filesystem turned everything except userspace to read-only!
Now here is what is real odd.. when I try pushing a file onto the tablet using adb, it instantly becomes corrupted when reading it back.
Like if I make a simple text file called hello.txt with some text in it saying "Hi there!", when I push that file onto the tablet, then read its contents it is gibberish.
This leads me to believe the whole filesystem somehow became corrupted and can no longer write files properly.
There doesn't seem to be a way to run fsck or anything alike and I can not put any files on the tablet because they instantly become garbled.
No use in running fastboot when the tablet no longer can go into the recovery screen either by vol+power pressing or by adb reboot recovery. Both simply just try to boot the tablet normally now, unlike the first time I tried
Assuming I have the factory .img file is there any way I can fix this?
Or does this sound like the hardware got damaged?
I fear the worst at this point.

[Q]DigiLand DL1010Q softbricked

Ok, here is the deal and I hope someone can help me. I have a cheap DigiLand DL1010Q tablet to play around with. It is stock, but I rooted it with KingRoot. There was a recent OTA wireless update and after it was installed it said that it needed to go into recovery mode to install and reboot. I selected install now and reboot. This is where my problem started and has remained. It loaded into recovery mode and is in an endless boot loop. I've tried rebooting it, recovery with the recovery file and every manual reset possible to no avail. DigiLand support said that I should power down the tablet, and while holding down the Volume Down (-) hit the power button and it will boot into a Chinese recovery mode. I've tried that and it just stays on the DigiLand screen forever. (I left it there for 8 hours.) I can sideload via ADB and the drivers are installed, but it will not let me load anything. It states that the bootloader is closed. I receive the same message via Fastboot. Now here is the interesting thing. Even after selecting the factory reset within the Recovery Mode, everything is still there. I have wiped the cache and partition and user data, but nothing really happens. It is still all there. I see the recovery file, but it will not load. All I see is NO Command.
I do have a sd card that I could flash things on, but it doesn't seem to register the card. It sees the sdcard, but that is the internal drive. How do I get it to look at the sdcard that I put into the slot? Is there a bootloader unlock? Does anyone have the factory image that I can put on my sdcard? HELP!!!!
I am fairly good with computers and have rooted phones and tablets before, but I seem to be hitting my head on a bricked wall - no pun intended. Let me know what programs, files or whatever. At this point I am willing to try anything. I can send it back to China for $50 for them to redo it, but I only paid $69 for it and I'm not going to put more money into this cheap tablet. I would just like to get it to work.

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