Android OS Forum banner
101 - 120 of 125 Posts

·
Malicious Droid
Joined
·
189 Posts
Discussion Starter · #101 ·

·
Registered
Joined
·
3 Posts
Hey everyone this is my first post on here have always skimmed around the atrix and nexus forums but today I ran into a really big jam with my nexus 7. I cant get out of this bootlop when i try to turn it on. I cant get past the black google screen it just turns on and off every 10 seconds. I try holding both volume keys with power button but it wont do anything different.

I have had it hooked up to usb and labtop as well as ac adapter to wall but I cant get into bootloader for the life of me. I was just trying to update twrp from 2.2.0 to 2.2.1. I tried to flash the new zip and it just restarted in a bootlop from there. Please is there anything I can do to save my device I am already unlocked and rooted so sending it in to asus I am sure would be a no go.
 

·
Registered
Joined
·
9 Posts
Hey everyone this is my first post on here have always skimmed around the atrix and nexus forums but today I ran into a really big jam with my nexus 7. I cant get out of this bootlop when i try to turn it on. I cant get past the black google screen it just turns on and off every 10 seconds. I try holding both volume keys with power button but it wont do anything different.

I have had it hooked up to usb and labtop as well as ac adapter to wall but I cant get into bootloader for the life of me. I was just trying to update twrp from 2.2.0 to 2.2.1. I tried to flash the new zip and it just restarted in a bootlop from there. Please is there anything I can do to save my device I am already unlocked and rooted so sending it in to asus I am sure would be a no go.
Here's what worked for me.......so try turning it on. Then, once it's on the black google screen, press the power button for 10 seconds.after that, hold on to the power button and volume up and down. It's a certain way you have to do this....if it still doesn't work, then plug it in to your pc or the wall and try the exact same thing again.
 

·
Registered
Joined
·
3 Posts
yea even connected to the pc or wall its same story. There really is nothing else I can do is there. My pc wont recognize it for the life of me I can't get it to bootloader I kinda don't know where to go from here.
 

·
Registered
Joined
·
9 Posts
yea even connected to the pc or wall its same story. There really is nothing else I can do is there. My pc wont recognize it for the life of me I can't get it to bootloader I kinda don't know where to go from here.
Don't panic. Just stay calm. This may be easily fixable. Let me come up with a solution.
 

·
Malicious Droid
Joined
·
189 Posts
Discussion Starter · #109 ·
Help! Whenever I try step 10, it says error, cannot load bootloader-grouper-3.34........i already have the bootloader installed. Can i just skip this step or....?
have u fastboot oem unlock?
 

·
Malicious Droid
Joined
·
189 Posts
Discussion Starter · #111 ·
Yeah! I have bootloader unlocked and had aokp until it started bootlooping. and i have the factory image downloaded and fastboot.exe.......but it still just says waiting for device.
try "fastboot devices" and see if it is even connecting.
 

·
Registered
Joined
·
1 Posts
RECOVERIES:
PREVENT RECOVERY OVERWRITE:
  1. After flashing recovery as described above, BEFORE you boot into device, boot into recovery.
  2. mounts and storage
  3. mount system
  4. Open a command prompt in the folder where your adb.exe lives. Typically this is the platform-tools directory in the SDK.
  5. Type in
    Code:
    adb shell
    and press enter.
  6. Type in
    Code:
    cd /system
    and press enter.
  7. Type in
    Code:
    mv recovery-from-boot.p recovery-from-boot.bak
    and press enter.
  8. Profit!
Thanks for this guide. I am having the same problem as a few others here, and it is the same problem I had here http://forum.xda-dev...d.php?t=1741395 After flashing CWM from bootloader mode, I have to boot into recovery. Then neither adb nor flashboot can access the N7 (insufficient permissions for "adb shell'; no devices for 'adb devices'; no response from 'flashboot devices', just a new command prompt). Using 'sudo' doesn't help. And killing and restarting adb works, but there is still no Nexus 7 connected as far as the PC can see.

I don't get the big picture in all this, but the narrow one seems clear (on my ubuntu 12.04 system): bootloader mode is accessible by adb and flashboot. Recovery mode is not.

So, from the CWM, unless I can go into the "Advanced" menu and Reboot Recovery or something else, then my only choice seems to be to "reboot system now" which will wipe out the CWM and give me a factory fresh stock unrooted, though unlocked ROM.

Please advise m(_ _)m

UPDATE: Even though I could not complete this process, I do apparently have root! Google Play has SuperSU listed as an app "Up to date", ditto for Root Checker by joeykrim. And in Root Checker, when I click "Check root", "Verify Root Access", SuperSU does pop up and ask if it should be granted root, I say yes, and Root Checker says I have root.

I did manage to install the SuperSU app once or twice in my recent attempts. The first time I rebooted, I am sure I did not have root. Maybe the last two times I tried it, I did get root. About tablet says:
Code:
<br />
Android version<br />
4.1.1<br />
Kernel version<br />
3.1.10-g52027f9<br />
[email protected])<br />
#1 SMP PREEMPT Thu Jun 28 16:19:26 PDT 2012<br />
Build number<br />
JRO03S<br />
As far as root goes, am I all set? I don't care about using a different ROM or bootloader. I just want to have more control in customizing -- and using Titanium Backup -- and still get the updates when they roll out. Is it all good?
 

·
Galaxy Nexus Fan
Joined
·
84 Posts
I just got this device and unlocked it. I then downloaded twrp 2.2.2 to my laptop desktop. I do know how to open a command prompt window where my fastboot .exe is but I would like the exact command that I need to enter in the command prompt window to install the twrp recovery on to my device please. I got a little confused with the instructions because they talked about location and renaming of the recovery. Any help would be appreciated.
 

·
Registered
Joined
·
41 Posts
The rooting was short-lived

Latest OTA update (JB 4.1.2) caused me to lose root and cwm. Will the same steps (and files for the bootloader and cwm) described in the first message work with JB 4.1.2 or has the bootloader changed for 4.1.2?
Under "Prevent Recovery Overwrite", should the file /system/etc/install-recovery.sh be renamed too?

Sent from my Nexus 7 using Tapatalk
 

·
Malicious Droid
Joined
·
189 Posts
Discussion Starter · #117 ·
If the file doesn't exist you are all set
 

·
Android Beginner
Joined
·
3 Posts
In the bootloader section you have version 3.34 listed for download. My wifi nexus7 came with 4.13, I'm guessing I need to downgrade for the recovery to stick?
 

·
Registered
Joined
·
358 Posts
In the bootloader section you have version 3.34 listed for download. My wifi nexus7 came with 4.13, I'm guessing I need to downgrade for the recovery to stick?
No, you just need the latest recovery. CWM should work (but I don't use cwm so i can't say for sure), but i know twrp's 2.3.3.0 works perfectly with the 4.13 bootloader because that's what i have right now...

Sent from my Nexus 7 using Tapatalk HD
 

·
Average Android
Joined
·
225 Posts
Did all this, but now I can't boot straight to recovery. It just sits at the Google splash. I have to reboot to recovery. Does anyone know why? I have the 32gb model

Sent from my Nexus 7 using RootzWiki
 
101 - 120 of 125 Posts
Top