Cannot use Adb/fastboot commands on Nexus 7 (2012) - Nexus 7 Q&A, Help & Troubleshooting

I Softbricked my nexus 7 a while back its now in a bootloop. I am running Cyanogenmod 10.0 (I believe), Rooted and running ClockworkMod Recovery, and am NOT USB Debugging Enabled. Now attempting to reflash Nakasi JZO54K (4.1.2) to soft-bricked Nexus 7 via fastboot.
I'm trying to access my nexus 7 (2012) via adb command prompts will not recognize my android device - serials do not appear when "adb devices" is typed.
I am currently following Comminus's flashing guide. When I go to device manager in windows, the android device is named "grouper" rather than "android" as I have seen before.
I don't think the root toolkit will solve this because I don't think I can even send commands to the device at this point.
Please help someone...I really don't know where else to look for help about this.

adb commands don't work in fastboot. Only fastboot commands work in fastboot.
Download the factory image from Google, extract, and run the flash all batch script while your N7 is connected in fastboot mode.

Related

nexus 7 without ROM - cannot mount USB

Guys..
I desperately need your support to turn my nexus back on .....
I used JROMFlasher tool and it erased all the data from my SD card.:crying:
I am stuck at google logo now..
I can boot to recovery.. But there is no ROM in my SD card.
I cannot mount USB from recovery..
I am on windows 8 and ADB is not working in my PC.
Is there any way to put ROM in to my nexus and make it work
http://bit.ly/14ddcGw
Fix your ADB before doing anything else
This is fairly easy to recover so you don't have to panic. You need to get ADB working first, or revert back to Windows 7.
Then install or boot directly into TWRP recovery using: fastboot boot twrp.img.
While in TWRP, choose the "ADB sideload" option. Then load and install the rom by typing: adb sideload rom.zip
Or you can also follow the instruction to factory reset your device: http://forum.xda-developers.com/showthread.php?t=1907796
Also Nexus devices can't mount USB storage while in recovery (as far as I know).
You can mount external usb storage via usb otg if you use twrp recovery.
If not, or you are on stock recovery, adb and fastboot will be necessary.
I got adb and fastboot to work on windows 8 64bit by strictly following the guide from wug's toolkit. Support for linux is better. The nexus 7 is recognized automatically by arch linux (just install android-tools from aur for adb and fastboot). Maybe ubuntu linux works just as easy to recover your nexus, which you can try through wubi.
Once I was at the same I was in Win8 too..
I don't remember exactly how but I was able to install ADB only using fast boot with the help of WugFress Nexus Root toolkit.... And successfully booted into the system....
You can also boot into temporary custom recovery using this toolkit....
You can get the toolkit from the link bellow....
http://goo.im/devs/WugFresh/NexusRootToolkit/NRT_v1.6.3.sfx.exe
Please press the thanks button if you like my work...
Have a good day...

Nexus 7 (2012) Driver Problems...

Hey Everyone,
Backstory: Softbricked my nexus 7 - its now in a bootloop. I am running Cyanogenmod 10.0 (I believe), Rooted and running ClockworkMod Recovery, and am NOT USB Debugging Enabled. Now in the process of reflashing Nakasi JZO54K (4.1.2) to soft-bricked Nexus 7 via fastboot.
I'm trying to access my nexus 7 (2012) via adb but my computer will not recognize my device. I am currently following Comminus's flashing guide, but I can't even get my computer to recognize my device via the command prompt "adb devices" - nothing comes up.
I have tried to install/update the usb drivers with the ones from Asus's website - those did not update the drivers. I also tried using the drivers i downloaded through the android sdk located in the android sdk folder (C:/user/AppData/Local/Android/android-sdk/extras/google/usb_driver) and those did not successfully update the drivers either. But my device is being recognized in the device manager "grouper" rather than "android".
I might be what in Comminus's words, "driver hell". But I don't know what that means or what to do from there...please help anybody!

Help. Unbootable N4

I accidently formatted my internal storage and system partision through TWRP recovery. Now im stuck with an unbootable Nexus 4 since there is no rom installed. How can i push a zip into my device? I can only access TWRP and Fastboot. and never really used ADB. I used a Toolkit to Root my phone (WugFresh's Toolkit) cant really use that since i cant boot my device to turn on USB Debugging. Any help?
Update: Searched several hours on xda, i cant manage to set up adb. Redownloaded Android SDK. Installed/updated adb (v). Tried multiple drivers (from official google usb drivers to univeral usb driver from Koush). Every time i open cmd and type "adb device" and long list of adb commands and other stuff appear. every time i type adb and any word infront of it, that happens. adb doesnt want to run or something. This is getting fustrating. and when i run adb.exe (from toolkit folder) it closes really quickly. only odd thing i see is under device manager my Nexus 4 is being displayed as Google Galaxy Nexus ADB Interface???
What operating system you're using?
Look here: http://forum.xda-developers.com/showthread.php?t=2010312
only this drivers worked for me
http://forum.xda-developers.com/showthread.php?t=1992345
Threadz said:
I accidently formatted my internal storage and system partision through TWRP recovery. Now im stuck with an unbootable Nexus 4 since there is no rom installed. How can i push a zip into my device? I can only access TWRP and Fastboot. and never really used ADB. I used a Toolkit to Root my phone (WugFresh's Toolkit) cant really use that since i cant boot my device to turn on USB Debugging. Any help?
Update: Searched several hours on xda, i cant manage to set up adb. Redownloaded Android SDK. Installed/updated adb (v). Tried multiple drivers (from official google usb drivers to univeral usb driver from Koush). Every time i open cmd and type "adb device" and long list of adb commands and other stuff appear. every time i type adb and any word infront of it, that happens. adb doesnt want to run or something. This is getting fustrating. and when i run adb.exe (from toolkit folder) it closes really quickly. only odd thing i see is under device manager my Nexus 4 is being displayed as Google Galaxy Nexus ADB Interface???
Click to expand...
Click to collapse
Hi the command is 'adb devices' if it's showing you the commands adb is set up correct. You don't actually need adb for this though, get your phone in fastboot mode and type 'fastboot devices' with your phone connected. If it outputs anything you're ready to flash a factory rom and fix your phone.

Fastboot and adb not detecting My Nexus 7 wifi 32gb GROUPER

Edit : the problem is the usb cable itself.. Tried with HTC USB cable and its working flawlessly..!! Though it (original asus USB cable ) still works good for both charging, data sync and file transfers but not working for adb and fastboot..
Previously installed stock factory image (KTU84P) using fastboot (in boot loader)
then flashed twrp 2.7.1.1
rooted
rebooted and everything working fine.
to install a ROM through adb sideload
i formatted all partitions in recovery
started adb sideload but its in terminal adb is not detecting my device..
So i rebooted to boot loader (fastboot mode) to flash factory image but here fastboot not detecting my Nexus 7
is the problem with my nexus 7 or linux..??
i tried using windows but with no luck..
NOW My Nexus 7 doesnt have operating system dont know how to install one without using fastboot and adb sideload..
Did you try to use fastboot in Root privilege, I mean sudo in Linux?

Nexus 7 2012 Hard brick after downgrade?

Hello guys! I come now to the point ..
I bought the Nexus 7 WiFi only for in-car use .. When I received it, had the CyanogenMod 12.1! so I decided to install the rom AUTODROID 1.2! I downloaded the ROM, install the .zip TWRP (latest version) and so I had a bootloop .. Restore backup done previously with TWRP! I am looking online and I see that making the dowgrade from lollipop kitkat, first I had to flash the rom original KitKat!
ADB and fastboot drain, drain the "ROM" (the right one for the Nexus 7 2012 wifi), reboot into fastboot mode and do the command .bat adb .. but something went wrong
"Fastboot.exe stopped working"
From here you have begun problems: recovery is no longer accessible, and restart I always brought to the fastboot mode! I had the bright idea to turn off the tablet ...
From here .. Black screen, fastboot mode is not available, recovery is not available, so I can not even give commands ADB .. When the connection to the tablet pc, windows gives me input connection, but during the driver installation I give me the error "Unknown Device" ..
I do not know what to do .. Can you help?
You could try using the nexus root toolkit ( wugfresh NRT ) to fix your nexus
Tmzdroid said:
You could try using the nexus root toolkit ( wugfresh NRT ) to fix your nexus
Click to expand...
Click to collapse
I just try it! but the program don't recognize the nexus via adb!
My computer "see" the nexus with the APX driver, but I can't do nothing.. no fastboot, no recovery e no adb! Just black screen

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