yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] TechSilver13:
C:\Users\Skyler\AppData\Local\And

bootloader bootloader-grouper-4.1

sending 'bootloader' (2096 KB)...

OKAY [ 0.250s]

writing 'bootloader'...

FAILED (remote: (Unknown error co

finished. total time: 3.202s

Any ideas?

I was unlocked and the tablet just didnt boot today. I have tried everything, no matter what I keep getting this error

---------- Post added at 02:26 AM ---------- Previous post was at 02:20 AM ----------

got this far

C:\Users\Skyler\AppData\Local\Android\andr

bootlader bootloader-grouper-4.13.img

sending 'bootlader' (2096 KB)...

OKAY [ 0.250s]

writing 'bootlader'...

FAILED (remote: Invalid Partition Name.)

finished. total time: 0.281s
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Based on the output of the fastboot commands, it looks like flashing back to stock did in fact work. You may need to send this in for warranty work.
[Nexus 7 Q&A, Help & Troubleshooting] RoFunTech:
Mine stops here:

56.000seconds -> about 15hours O.o i should let it 15 hours?
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
:eek:

No, it shouldn't take 15 hours. Please try a different USB port and/or cable. Make sure your device is charged before trying again though.
[Nexus 7 Q&A, Help & Troubleshooting] GeyerA:
All works well but does not boot

Hi all, this got a royal pain in the a...

I made all according the instructions, it works well (no error and sha1 is also ok) but does not boot. I get stuck at the Nexus X.....I attached a txt file with my log from the terminal.

I went also on Windows 7 and tried the Tool which is posted in another thread. I was not so lucky with the adb/fastboot. I did not use Windows for a while so my set-up is poor.

Any idea what I can try? Thanks however; I will open a bottle of red wine now

UPDATE, vaffanculo, I downloaded 4.1.2 and could restore......I have no clue why this now worked. I will re-try 4.2.1.....

UPDATE2, did not work but changing the cable to GNex, worked. I think it was the wine.
[Nexus 7 Q&A, Help & Troubleshooting] RoFunTech:
Same thing, it's not working:(
[Nexus 7 Q&A, Help & Troubleshooting] GeyerA:
Hi guys, I just spent at least 6 hours on my Nexus 7 and all worked according the instructions but stuck in the X screen. I went to flash 4.1.2 which worked; then I tried again the factory image 4.2.1. and got stuck at the "system" installation. I changed the cable to the one from my GNex and worked. So in short, flash the 4.1.2 factory image and then flash 4.2.1 and also try another cable. Hope this helps. Thumbs up!!
[Nexus 7 Q&A, Help & Troubleshooting] Leonhan:
My friends nexus 7 worked the same way. He had no luck flashing 4.2.1 directly, so he resorted to flashing 4.1.2, then just updated via the OTA and worked like a charm.xD Although mine was ok flashing 4.2.1 directly though, it seems that its not for everyone.
[Nexus 7 Q&A, Help & Troubleshooting] ashwin123:
Guys just some info for those stuck here...

I was stuck on the google screen, was able to boot to recovery but no matter how I flashed it (both toolkits and manual flashing as well) the n7 wouldnt boot, locked bootloader and sent it in for warranty, was reported to be a motherboard issue... just so you know am not a noob and am pretty experienced flashing stuff, I make video tuts on the same so I didnt mess anything up... so for those who have tried all these steps (great instructions btw) and still are stuck on the google screen ( not flashing issues or the x screen) you might be facing a mobo issue, send it in for warranty and there were no issues with asus accepting my n7 (and I live in india where they easily refuse warranty if they can find any reason to)
[Nexus 7 Q&A, Help & Troubleshooting] RoFunTech:
We need a easily way to reflash :) like Odin...
[Nexus 7 Q&A, Help & Troubleshooting] GeyerA:
Hi, I also hoped so but the OTA did not work but the flash of 4.2.1 after installing 4.1.2 worked. We just need to stay calm and do what Comminus described in the first page. BTW, your driver set-up, ADB set-up and USB cable are important too. Please just use original equipment and not cheap cables. Stay on the thread and share your problems, we will find a solution for all of you but sometimes it is not simple.....
[Nexus 7 Q&A, Help & Troubleshooting] RoFunTech:
Still cant work :( please help me out
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
No, this is easy. When problems like we've seen in the last several posts happen it's almost always because of drivers, USB port or cable issues. If these problems are occurring, changing the software won't solve it.

Do you have accessed to a different PC? Maybe one with Linux on it?

Sent from my Nexus 4
[Nexus 7 Q&A, Help & Troubleshooting] RoFunTech:
i had windowsxp and i changed to windows7
[Nexus 7 Q&A, Help & Troubleshooting] talyene:
This is an awesome guide.

After pretty much all the apps I use on a regular basis starting to FC this seemed like the only option, but I couldn't find a decent step by step guide until I came across yours.

Thank you so much.
[Nexus 7 Q&A, Help & Troubleshooting] fskhan619:
I'm unable to perform this step. I've installed the Driver, now how do I you command and how do I perform this step. Thanks for the help, I'm a beginner.
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Can you be a little more specific? adb, fastboot? What exactly is the issue?
[Nexus 7 Q&A, Help & Troubleshooting] fskhan619:
I've performed till step two and after that I'm not sure what to do? Unable to fastboot and adb. Thanks for the reply! :)

---------- Post added at 12:26 AM ---------- Previous post was at 12:20 AM ----------

You said:

'Once the driver is installed open a command prompt and change directories to <your sdk directory>\platform-tools (see #2). From the command prompt run "adb devices".'

How do I do that?
[Nexus 7 Q&A, Help & Troubleshooting] mouse100:
R: [GUIDE] Flashing a Factory Image with fastboot / return to stock

You saved my Nexus 7! Thanks!!!

Nexus 7 3G - Tapatalk
[Nexus 7 Q&A, Help & Troubleshooting] Skyfall007:
INSTRUCTIONS FOR 4.2.2 Factory image(Wi-Fi only)

fastboot oem unlock

fastboot erase boot

fastboot erase cache

fastboot erase recovery

fastboot erase system

fastboot erase userdata

fastboot flash bootloader bootloader-grouper-4.18.img

fastboot reboot-bootloader

fastboot -w update image-nakasi-jdq39.zip
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Thanks, RobYyY. I'll update the OP later today. :good:
[Nexus 7 Q&A, Help & Troubleshooting] fluxthesky:
I realized that if you do the initial driver configuration from WugFresh's root tool kit, you won't need to install drivers on the first post.

This worked for me, I wonder if anything is wrong with this method?
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
The issue that I have with it is using a toolkit. ;)

There has never been and likely will never be any time that I suggest or recommend that somebody use a toolkit on a Nexus device over handling things with standard tools. My reasoning for this is that I believe people need to understand what is happening when they are modifying system drivers or flashing software on a device. Relying on a toolkit without any understanding of what actions that toolkit is performing can be dangerous and has put many people in situations where their devices are boot-looped or soft-bricked and they have no idea where or how to begin resolving the issue.

Having said that, I'm glad you got your drivers sorted! :D
[Nexus 7 Q&A, Help & Troubleshooting] novahob:
Thanks for the guide but i think i might have an issue but not 100% sure. I just bought my nexus 7 and it had CM10.1 on it though i wanted to put it back to stock. I did the following:

fastboot oem unlock

fastboot erase boot

fastboot erase cache

fastboot erase recovery

fastboot erase system

fastboot erase userdata At this stage it hung for a while and in the end after 741 seconds i pulled the USB out, and continued with the process.

fastboot flash bootloader bootloader-grouper-4.18.img

fastboot reboot-bootloader

fastboot -w update image-nakasi-jdq39.zip At this stage again i pulled the USB again after 2032 seconds and it gave the message "too many open files in the system"

So i then did the following to install the below 3 files:

fastboot boot boot.img

fastboot system system.img

fastboot recovery recovery.img

I did then try and flash 'fastboot userdata userdata.img which erased and sent but failed to write again, as i pulled the USB out again due to the time it was taking, message "status read failed <unknown error>"

Now i know i probably shouldn't have pulled the USB out but there asn't anything else i could have done. The stock 4.2.2 boots up ok, and seems to be working ok. I have done a system restore, wipe cache through stock recovery and all seems to work ok. So i really want to know is do i have an issue (will it cause issues when using the N7) in that i can't use fastboot to erase/write the userdata file?
[Nexus 7 Q&A, Help & Troubleshooting] lkspooky:
Thanks

Thanks for the guide. I screwed up and flashed a bad rom and recovery and you saved me:D
[Nexus 7 Q&A, Help & Troubleshooting] Tomjodh:
Hi thanks for the awesome guide. I have a question.

If I just want to update my bootloader can I just flash it with fastboot?

Can I ignore the erase commands?

I ask this cause I want to flash a kernel that requires bootloader 4.18 (I'm still on 4.13), but I don't want to wipe my user data. Is this possible?
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Yes. The erase commands are only important if you are flashing any one of those partitions. So in your case, no erase is required.
[Nexus 7 Q&A, Help & Troubleshooting] Daltonyx:
Help. :c

I think I soft-bricked my Nexus 7. :c I was using the Ubuntu Installer, and something messed up, I got the blackscreen bug, and crap hit the cieling. I can get into bootloader and CWM, but I have no ROM on the tablet at all, and I can't ADB or Fastboot into the thing. I'm really at a loss as how to return this to normal, and I can't lose my tablet! I don't have a phone, so this thing is like my life.

Can someone PLEASE FOR THE SAKE OF ALL THAT IS HOLY HELP ME
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
If you can get the device to fastboot it is recoverable. Not having your computer recognize the device is going to be an issue with the computer, most likely the drivers. Get the drivers sorted and you will be good to go.
[Nexus 7 Q&A, Help & Troubleshooting] Daltonyx:
That's kind of my issue. I have the drivers and everything, but because I have no rom, I have no USB debugging, and it's not being recognized. At least, that's what I'm thinking is my issue. The point of the matter is that I can get into fastboot mode, but adb and fastboot stick at "wait-for-device."

And thank you for responding so promptly! This is why I love all of you here!
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Try installing the universal naked drivers http://xdaforums.com/showthread.php?t=1998650. Adb and USB debugging are entirely irrelevant when dealing with fastboot.
[Nexus 7 Q&A, Help & Troubleshooting] Daltonyx:
THAT FIXED IT! THANK YOU SO MUCH! I'm now adding this to my arsenal. You are a genius! lol
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
I'm glad it worked out for you. The real thanks goes to 1wayjonny for the drivers. :thumbup:
[Nexus 7 Q&A, Help & Troubleshooting] safilo:
Help me get out of a stuck bootloader

Many thanks!

I was trying to flash 4.2.2 using both toolkit (wugfresh & Skippen) and got stuck at the bootloader.

After following your guide, managed to get a stock 4.2.2 on the first attempt.
[Nexus 7 Q&A, Help & Troubleshooting] ArcherGT2:
Bricked N7

Hi all. I've been following this tutorial on my bricked Nakasi (N7 wifi). Now, I can access fastboot mode and it works perfectly, but when I tried to flash the 4.1.2 (JZO54K) image it told me something along the lines of "cant find recovery.sig" and "image.sig". Inside the file there are "recovery.img" and "image.img". Im away from home now, but should I try:

- to flash the 4.2.2 image

- to rename the file extensions from sig to img on the 4.1.2

- flash a "full" (?) recovery image with the SIG files (if so, can you please link me to it)

On a sidenote, I can flash CWM perfectly. When enter to it, it tells me that it cant load anything, hinting that the SD card has been wiped.

Thank you for your help. As someone on the other page said, **** has hit the ceiling :-/
[Nexus 7 Q&A, Help & Troubleshooting] fede01_8:
THANK YOU!! I followed other guide and ended up screwing up my N7. Installed like 28 toolkits... useless. I followed this guide and it's working like a charm with the latest firmware. Thanks!

Greetings from Argentina!
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
You can safely ignore the warning about missing .sig files. We don't have them and this does not prevent one from flashing the factory images. I would recommend 4.2.2 - it runs quite nicely.

This process wipes everything. So it's completely normal that the sd card would be wiped.
[Nexus 7 Q&A, Help & Troubleshooting] ArcherGT2:
thank you for your quick reply. Yesterday (when I tried to flash it), afther giving the update command, the PC froze for a second or two, asked for the SIG files and didnt allow me to continue with the installation. When I get home, I'll try with the 4.2.2, and post pics if it gets all funky.

See you later :D
[Nexus 7 Q&A, Help & Troubleshooting] ArcherGT2:
This is the error I'm facing:

C:\android-sdk\platform-tools>fastboot -w update image-nakasi-jdq39.zip

archive does not contain 'boot.sig'

archive does not contain 'recovery.sig'

failed to allocate 483127648 bytes

error: update package missing system.img

Attached a screenshot of the text as well.

Any ideas?

:-/

EDIT: On a completley abnormal display of wit, I unzipped the XIP file and manually flashed each img. Rebooting as I type. Thanks for your patience. Cheers. :D
[Nexus 7 Q&A, Help & Troubleshooting] chimpanzeexda:
looks like it is your java vm that failed in the middle. either OOM or out of disk space. probably corrupted zip file as well
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Yeah this sounds like a corrupted zip. You should download again. Additionally, you can compare the sha1 or md5 with the value on the site.
[Nexus 7 Q&A, Help & Troubleshooting] stfudude:
So it's like this:

fastboot devices

fastboot flash bootloader bootloader.img

fastboot reboot bootloader

Correct?

Do I have to unlock the bootloader again?

Edit: forgot to mention that I'm on custom rom.

Edit #2: can i update the radio with the same step? (obviously with flash radio radio.img) I don't want to return to stock rom.

Sent from Nexus 7 3G using Tapatalk HD
[Nexus 7 Q&A, Help & Troubleshooting] Mach3.2:
You can flash the radio alone.

And there is no need to unlock the boot loader again if you have it unlocked.

Beamed from my Grouper
[Nexus 7 Q&A, Help & Troubleshooting] stfudude:
Thanks for clearing my doubts. I will proceed with my plan later.

Sent from Nexus 7 3G using Tapatalk HD
[Nexus 7 Q&A, Help & Troubleshooting] nestedrana:
cant enable usb debugging....pls help

Hi

i am new to android...i bought google nexus last night from a friend...everything was working fine...then i did factory reset to wipe down all the data and settings....

after when it reboots it comes to google screen and after selecting country stuck at SEARCHING WIFI...here i can see the wifi icon is disable...

i was looking for the solution and spent most of the night but could not find any....i can not turn the usb debuggin mode on as it can not complete the setup....i tried bootloader recovery thing...but the screen displays following information

Fastboot mode

product name grouper

bootloader version 3.34

baseband version n/a

signing not define yet

hw version er 3

locked state locked

volume key does not do anything nor the power button..it just stuck....ANYONE PLEASE HELP ME TO SORT THIS OUT...MUCH APPRICIATED

REGARDS
[Nexus 7 Q&A, Help & Troubleshooting] Leonhan:
That screen is the fastboot screen. If you are stuck, you can flash the stock rom using fastboot commands found in the first page.
[Nexus 7 Q&A, Help & Troubleshooting] kirKauai:
quick question (hopefully). I bricked on the 4.2.2 OTA. I did the factory reset and I have been following the steps in this thread to flash the 4.2.2 to my N7. Had a speadbump connecting until I thought to login to my Cerberus account and send an unlock. I am at the last instruction update the image and I was wondering how long it should reasonably take to complete sending and start to reboot?
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
The time from when you begin issuing fastboot commands to when the device reboots should be no more than a few minutes.
[Nexus 7 Q&A, Help & Troubleshooting] gastonwalpole:
just had a quick question, im on 4.2.2 now, rooted, twrp, supersu, custom kernel.

can i use this guide to flash back to while im on 4.2.2 and i have to flash stock kernel before i do this right?
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
You don't need to be running stock in order to perform the steps in this guide. The presence of a stock kernel is a requirement of OTA updates because they apply a patch rather than overwriting the entire kernel.
[Nexus 7 Q&A, Help & Troubleshooting] Dr.Molestratus:
Super, thanks!
[Nexus 7 Q&A, Help & Troubleshooting] GeyerA:
USB cable

Hi all, I used this thread to flash the images and encountered problems. Although I used the original USB cable, I could not pass the bootanimation. Then I used the USB cable of my Galaxy Nexus and all worked. So if you have problems, change the cable. Nice Sunday !
[Nexus 7 Q&A, Help & Troubleshooting] cptsashimi:
Thanks for this guide and the links to get me out of "driver hell." I've used it twice now in the last week and worked like a champ each time. The first time I couldn't get the drivers right and the links helped. The second time I went to far and had to return to stock to recover.

Thanks a million.
[Nexus 7 Q&A, Help & Troubleshooting] miguelca:
Thanks a lot for taking your time to make this excellent guide.

Everything is neat and tidy, carefully explained.

I hope not having to use this (sending my Nexus 7 for repair) but it's great to have all information available.

Great work! :)
[Nexus 7 Q&A, Help & Troubleshooting] tambourineman86:
Thanks for the wonderful guide! This is the easiest way to make sure you get a squeaky CLEAN install of the 4.2.2 update. My bluetooth randomly broke on the 4.2.2 aokp rom and this is the ONLY thing that fixed it. Thanks again!
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Thanks for all the kind words. :)

Without hijacking the thread, If anyone has any suggestions that would provide more help to others please feel free to let me know.
[Nexus 7 Q&A, Help & Troubleshooting] sakax:
why are all tutorials always refering to the android sdk requirement? i am a Debian linux user and installing the android sdk takes literally ages for only fastboot and adb which are required to unlock bootloader, update recovery and install a custom rom. i think the full sdk downloaded 5 gb which is completely crazy if both tools can be easily required as shown below. please spread the word and stop wasting bandwith :angel:

Android SDK (platform-tools only) Revision 16, Mon Nov 12 17:13:48 2012

Linux

dl.google DOT com/android/repository/platform-tools_r16-linux.zip

Size: 13MB

SHA1: 84d563ae5e324f223f335f11bf511bf6207c05fb

Windows

dl.google DOT com/android/repository/platform-tools_r16-windows.zip

Size: 11MB

SHA1: 0d6245b685c7d303cf4a054a3d373c4427b7ad01

Mac

dl.google DOT com/android/repository/platform-tools_r16-macosx.zip

13M

SHA1: fbb0f8d2786a83b8c3eb6df402e706e136db8fed

edit: it seems I am not granted permissions to post hyperlinks... replace DOT with actual dot :crying:
[Nexus 7 Q&A, Help & Troubleshooting] comminus:
Thanks for taking the time to post and welcome to xda.

The purpose of this thread had never been to give people the platform tools, a list of commands to run and send them on their way - that does not make for a useful learning experience. The assumption is that whoever is reading the guide has not done anything like this before - which is why the approach is verbose rather than terse.

The ADT bundle is larger than the SDK tools, but neither are anywhere near 5GB. In fact, on Windows the SDK installer is around 75MB (~165MB installed) and around 85MB on Linux. Which is why I link directly to the SDK installer in the guide and not the ADT bundle. Aside from that, most people are not having issues with obtaining the tools. Most of the problems that Windows users experience are driver issues, and this will continue to be the biggest issue for them. I have been working on a version of the guide that does not include the SDK and provides some better support for driver issues, but it's not ready yet - my actual job keeps getting in the way :)
[Nexus 7 Q&A, Help & Troubleshooting] sakax:
it was not meant for you specific - more a general comment for the whole XDA community - i just posted in your topic as i only have a nexus 7 device ;)

installing the sdk is indeed not that huge but it becomes huge as soon as you update the SDK in order to obtain adb and fastboot which is not included in the default sdk installer. initiating updating is downloading/installing the whole SDK repository
[Nexus 7 Q&A, Help & Troubleshooting] Ciphersbak:
Thank you for the simplistic guide

Thank you for the simplistic guide.

Works like a charm. Instead of choosing stock, After I flashed TWRP, i used adb sideload to install a custom ROM.

Cheers,

Geek endangered:good:
[Nexus 7 Q&A, Help & Troubleshooting] donpippo:
probably you installed all the API end extras

I've installed the SDK Tools Only

http://developer.android.com/sdk/index.html
[Nexus 7 Q&A, Help & Troubleshooting] brainvision:
hi boyz..

I'm still moving my first steps into Nexus 7 wonderful world ( :D ) and so I'm reading a lot of stuff, all here at xda, the best place for everything is related to Android, imo..

I would like to say thank you to comminus, the OT, for this useful thread: I care about knowing how to come back to stock ROM! You know, just in case.. ;)

now.. I have 2 computer at home, both of them with dual boot: the PC has XP x86 / Slackware x86 while the notebook has 7 x86_64 / Slackware x86_64.

I'm on Slackware all the day, winZ is only a waste of space 'cause I really don't use it, never.. So I obviously would like to install Androd SDK and all the stuff I need here into Slackware, notebook would be perfect. I did practically everything: I choose to not install all the stuff 'cause I'm not a developer so I only need platform-tools (really curious that last posts here show that in particular, but I think most of us already know it! :D ).

One problem I encountered is that adb and fastboot are 32 bit only!! If you try to launch them on a 64 bit you receive an output like "file or directory doen't exist" - but I didn't want to install the multilib only for this little binary..!!

I was ready to throw out all and use the 32 bit when I finally found a program that is able to do what I didn't have the patience to manually do! iIt link statically libraries needed by a binaries and rebuild a new binaries with all those lib inside!! Perfect!!

So I install platform-tools into Slackware 32 bit and then I use this software to build the new binaries.. Then I try them into Slackware 64 biut and.. they worked!! Like a charm!! :D :D

so happy when I success on something!! :D :D

so devices option gives me the right output, the reboot-bootloader one works and I'm really really happy..

but.. I read into you first post that before going on I should see if fastboot recognizes the device, shouldn't I? So, while the Nexus was still into bootloader mode, I typed at the terminal:

fastboot-32 devices

(forget about the -32 part, it's the rebuild binary) and the output was

[no permissions fastboot /CODE]
I would like to ask if you know what does it mean, please.. it seems to work but no permission.. maybe I have to root the Nexus, first?

thanks for paying attention, see you! ;)