Database Users

Accidentally erased my OS. Need help getting it back.

Made a silly mistake. I was going to flash M-kernel to my device after updating to 4.2.2 and while I was in Team Win recovery I chose to wipe cache and system. I flashed the kernel and now when I select to reboot it says "No OS installed! Are you sure you wish to reboot?" I still have the file to flash 4.2.2 but don't know how I can get it on the device in it's current state. Any help would be greatly appreciated.
I tried this method here: http://forum.xda-developers.com/showthread.php?t=1667929 however I can't get Unmount/sdcard to work in the recovery menu and therefore can't push the OS file using the cmd prompt.

You may have to fastboot the system.img and boot.img into place. How did you root? Did you use root and unlock? Did you use wugs? Do you have android sdk and fastboot installed?
Btw, I did this too. I was preparing to flash a rom, did a factory reset, wipe system, and (understand I had just gotten this device at the time LOL) wiped internal storage. Which meant my backups and update.zips were gone. The nexus 7 doesn't seem to have a way to mount twrp from recovery to side load files so I just used fastboot to fix it.

hlxanthus said:
You may have to fastboot the system.img and boot.img into place. How did you root? Did you use root and unlock? Did you use wugs? Do you have android sdk and fastboot installed?
Btw, I did this too. I was preparing to flash a rom, did a factory reset, wipe system, and (understand I had just gotten this device at the time LOL) wiped internal storage. Which meant my backups and update.zips were gone. The nexus 7 doesn't seem to have a way to mount twrp from recovery to side load files so I just used fastboot to fix it.
Click to expand...
Click to collapse
I use Root Tool Kit to root and unlock. I have android sdk installed on the PC but not sure what fasboot is. Can you explain how to "fasboot the system.img and boot.img into place"?

If you are using the toolkit, just select your device, select flash stock firmware and connect your nexus in bootloader mode (fastboot mode, hold volume down and power when it's turned off)
Sent from my Nexus 7 running Android 4.2.2

mihahn said:
If you are using the toolkit, just select your device, select flash stock firmware and connect your nexus in bootloader mode (fastboot mode, hold volume down and power when it's turned off)
Sent from my Nexus 7 running Android 4.2.2
Click to expand...
Click to collapse
Will doing this cause me to lose everything I have on the Nexus already?

[Q] Can I root 4.3 without flashing customer recovery

I had rooted my Nexus 4 when on 4.2.x by putting it in bootloader mode first and typing fastboot boot <name of twrp custom recovery>.img at the command prompt to reboot it into TWRP custom recovery mode without if actually flashing the TWRP recovery on the device. Back then, this temporarily recovery mode allowed me to flash the supersu update zip file I needed to. Since 4.3, this command reboots the phone, but the screen is now blank, and I can't flash the zip file. I can reboot the phone normally into stock recovery mode using the volume keys and power button, but this does not allow me to flash the zip file to root it. Can I still use fastboot boot method like before, and how? The reason I want t stay on stock recovery for now is to keep future OTA updates from throwing an error message.

rajendra82 said:
I had rooted my Nexus 4 when on 4.2.x by putting it in bootloader mode first and typing fastboot boot <name of twrp custom recovery>.img at the command prompt to reboot it into TWRP custom recovery mode without if actually flashing the TWRP recovery on the device. Back then, this temporarily recovery mode allowed me to flash the supersu update zip file I needed to. Since 4.3, this command reboots the phone, but the screen is now blank, and I can't flash the zip file. I can reboot the phone normally into stock recovery mode using the volume keys and power button, but this does not allow me to flash the zip file to root it. Can I still use fastboot boot method like before, and how? The reason I want t stay on stock recovery for now is to keep future OTA updates from throwing an error message.
Click to expand...
Click to collapse
This is still possible but the command for booting into custom recovery changed.
This helps.

rajendra82 said:
I had rooted my Nexus 4 when on 4.2.x by putting it in bootloader mode first and typing fastboot boot <name of twrp custom recovery>.img at the command prompt to reboot it into TWRP custom recovery mode without if actually flashing the TWRP recovery on the device. Back then, this temporarily recovery mode allowed me to flash the supersu update zip file I needed to. Since 4.3, this command reboots the phone, but the screen is now blank, and I can't flash the zip file. I can reboot the phone normally into stock recovery mode using the volume keys and power button, but this does not allow me to flash the zip file to root it. Can I still use fastboot boot method like before, and how? The reason I want t stay on stock recovery for now is to keep future OTA updates from throwing an error message.
Click to expand...
Click to collapse
The short answer is no, you need a custom recovery to install superuser. The long answer is you can flash a custom recovery and install superuser and then flash back the stock recovery. If that doesn't work then your out of luck.

kzoodroid said:
The short answer is no, you need a custom recovery to install superuser. The long answer is you can flash a custom recovery and install superuser and then flash back the stock recovery. If that doesn't work then your out of luck.
Click to expand...
Click to collapse
You are absolutely wrong. I just booted into TWRP without flashing it and rooted my Nexus 4, which is otherwise stock 4.3. I still have the stock recovery on the device and can access it using the volume keys. Booting into TWRP was a temporary state achieved using the command line syntax:
fastboot -c "<your_default_command_line> lge.kcal=0|0|0|x" boot <name of custom recovery>.img
The 4.2.x version of this command was simpler, as it did not require the -c "<your_default_command_line> lge.kcal=0|0|0|x" part, but you do need it on 4.3, or the device just temporarily boots into a blank screen, instead of the custom recovery. So the long answer is you do need to boot into a custom recovery, but it does not have to be flashed to the boot partition. With a Nexus 4, you are never out of luck.

rajendra82 said:
You are absolutely wrong. I just booted into TWRP without flashing it and rooted my Nexus 4, which is otherwise stock 4.3. I still have the stock recovery on the device and can access it using the volume keys. Booting into TWRP was a temporary state achieved using the command line syntax:
fastboot -c "<your_default_command_line> lge.kcal=0|0|0|x" boot <name of custom recovery>.img
The 4.2.x version of this command was simpler, as it did not require the -c "<your_default_command_line> lge.kcal=0|0|0|x" part, but you do need it on 4.3, or the device just temporarily boots into a blank screen, instead of the custom recovery. So the long answer is you do need to boot into a custom recovery, but it does not have to be flashed to the boot partition. With a Nexus 4, you are never out of luck.
Click to expand...
Click to collapse
Can you please write a Step by Step guide to root without flashing custom recovery,
I am familiar with basic commands of adb and fastboot. But a step wise guide will hep me get my N4 rooted

ajay_zalavadia said:
Can you please write a Step by Step guide to root without flashing custom recovery,
I am familiar with basic commands of adb and fastboot. But a step wise guide will hep me get my N4 rooted
Click to expand...
Click to collapse
Follow @efrant's guide. Section E is enough assuming you are on stock android.
That will do the trick.

rajendra82 said:
I had rooted my Nexus 4 when on 4.2.x by putting it in bootloader mode first and typing fastboot boot <name of twrp custom recovery>.img at the command prompt to reboot it into TWRP custom recovery mode without if actually flashing the TWRP recovery on the device. Back then, this temporarily recovery mode allowed me to flash the supersu update zip file I needed to. Since 4.3, this command reboots the phone, but the screen is now blank, and I can't flash the zip file. I can reboot the phone normally into stock recovery mode using the volume keys and power button, but this does not allow me to flash the zip file to root it. Can I still use fastboot boot method like before, and how? The reason I want t stay on stock recovery for now is to keep future OTA updates from throwing an error message.
Click to expand...
Click to collapse
Sorry for asking about your reason, but if you install the TWRP (or some other) custom recovery then can't you simply manually flash the OTA yourself? That's how I upgraded to 4.3.

ajay_zalavadia said:
Can you please write a Step by Step guide to root without flashing custom recovery,
I am familiar with basic commands of adb and fastboot. But a step wise guide will hep me get my N4 rooted
Click to expand...
Click to collapse
Copy your custom recovery to where fastboot.exe is.
Open a CMD window and type
adb reboot-bootloader
Click to expand...
Click to collapse
Then, once you're booted into Bootloader, type
fastboot -c "lge.kcal=0|0|0|x" boot customrecoveryname.img
Click to expand...
Click to collapse
Flash SuperSU 1.51 zip and then reboot your device.

rajendra82 said:
You are absolutely wrong. I just booted into TWRP without flashing it and rooted my Nexus 4, which is otherwise stock 4.3. I still have the stock recovery on the device and can access it using the volume keys. Booting into TWRP was a temporary state achieved using the command line syntax:
fastboot -c "<your_default_command_line> lge.kcal=0|0|0|x" boot <name of custom recovery>.img
The 4.2.x version of this command was simpler, as it did not require the -c "<your_default_command_line> lge.kcal=0|0|0|x" part, but you do need it on 4.3, or the device just temporarily boots into a blank screen, instead of the custom recovery. So the long answer is you do need to boot into a custom recovery, but it does not have to be flashed to the boot partition. With a Nexus 4, you are never out of luck.
Click to expand...
Click to collapse
In your original post you said you tried using the boot into recovery method and it didn't work so how am I wrong in saying that your only other option was to flash the custom recovery, install su, then flash the stock recovery all without rebooting? It was just another way of accomplishing the same thing. I posted at the same time as the other guy did who knew the new fastboot command, which I was unaware of and obviously you were too.

Mercado_Negro said:
Copy your custom recovery to where fastboot.exe is.
Open a CMD window and type
Then, once you're booted into Bootloader, type
Flash SuperSU 1.51 zip and then reboot your device.
Click to expand...
Click to collapse
thank you, will try when I get chance :good:

kzoodroid said:
In your original post you said you tried using the boot into recovery method and it didn't work so how am I wrong in saying that your only other option was to flash the custom recovery, install su, then flash the stock recovery all without rebooting? It was just another way of accomplishing the same thing. I posted at the same time as the other guy did who knew the new fastboot command, which I was unaware of and obviously you were too.
Click to expand...
Click to collapse
I just prefer the command line booting instead of having to flash a recovery twice. I already knew that I could flash the custom recovery to get it done, although I didn't clearly state that in the original post.

Mercado_Negro said:
Copy your custom recovery to where fastboot.exe is.
Open a CMD window and type
Then, once you're booted into Bootloader, type
Flash SuperSU 1.51 zip and then reboot your device.
Click to expand...
Click to collapse
Thanks for you guide, but for use it, do I nerd unlocke the bootloader ?
Inviato dal mio Nexus 4 con Tapatalk 2

futuro82 said:
Thanks for you guide, but for use it, do I nerd unlocke the bootloader ?
Inviato dal mio Nexus 4 con Tapatalk 2
Click to expand...
Click to collapse
Yes

Thanks
Inviato dal mio Nexus 4 con Tapatalk 2

kzoodroid said:
In your original post you said you tried using the boot into recovery method and it didn't work so how am I wrong in saying that your only other option was to flash the custom recovery, install su, then flash the stock recovery all without rebooting? It was just another way of accomplishing the same thing. I posted at the same time as the other guy did who knew the new fastboot command, which I was unaware of and obviously you were too.
Click to expand...
Click to collapse
LOL.. You were still wrong though bro. Don't get upset about it. He didn't seem to be...
Sent from my Nexus 4 using xda app-developers app

updated to 4.4.1 stuck in boot animation!

Installed 4.4.1 via TWRP this morning, but it is stuck in reboot. Just keeps doing the colliding circles!
Tried rebooting a couple of times. Can get to fastboot, But device isn't seen by adb, and fastboot only shows start (no recovery option)
Any ideas at this point?

RedBullet said:
Installed 4.4.1 via TWRP this morning, but it is stuck in reboot. Just keeps doing the colliding circles!
Tried rebooting a couple of times. Can get to fastboot, But device isn't seen by adb, and fastboot only shows start (no recovery option)
Any ideas at this point?
Click to expand...
Click to collapse
I would recommend flashing the 4.4 stock factory image from here in fastboot mode. Then once your device is booting up properly again I would recommend taking a look at this guide to properly install the 4.4.1 update.

You MUST either side load or safer still, un-root(if rooted) and flash stock recovery and sideload and then re-flash custom recovery and re-root if needed.
If you are able to get to fastboot:
Fastboot flash recovery recovery.img ( use stock)
Fastboot reboot-bootloader
go into to stock recovery - wait for dead droid, one you see him, go into recovery by holding volume+ and power at same time
follow the orange instructions to sideload via adb - which should now work
reboot and validate all is well
reboot into bootloader and re-flash your custom recovery and root (if needed)
Enjoy.

planet_x69 said:
You MUST either side load or safer still, un-root(if rooted) and flash stock recovery and sideload and then re-flash custom recovery and re-root if needed.
If you are able to get to fastboot:
Fastboot flash recovery recovery.img ( use stock)
Fastboot reboot-bootloader
go into to stock recovery - wait for dead droid, one you see him, go into recovery by holding volume+ and power at same time
follow the orange instructions to sideload via adb - which should now work
reboot and validate all is well
reboot into bootloader and re-flash your custom recovery and root (if needed)
Enjoy.
Click to expand...
Click to collapse
Thanks, I eventually got it. I was really puzzled that I couldn't select recovery from the bootloader. All set now though, thanks!

I hae also updated to 4.4.2 but now my N10 is stuck at the Google start page. Please help?

jalize said:
I hae also updated to 4.4.2 but now my N10 is stuck at the Google start page. Please help?
Click to expand...
Click to collapse
If you mean stuck at boot animation, then I suspect you used TWRP to flash?
I found that TWRP was not able to clear caches, so I use CWM instead. Worked like a champ...

RedBullet said:
If you mean stuck at boot animation, then I suspect you used TWRP to flash?
I found that TWRP was not able to clear caches, so I use CWM instead. Worked like a champ...
Click to expand...
Click to collapse
No I used the adb sideload command for the OTA. That all went well but now I'm stuck at the google page even before the animations begin!

jalize said:
No I used the adb sideload command for the OTA. That all went well but now I'm stuck at the google page even before the animations begin!
Click to expand...
Click to collapse
Hold volume up and power to get it to recycle, and immediately hold all three buttons down to get to bootloader. Try clearing your caches from recovery

RedBullet said:
Hold volume up and power to get it to recycle, and immediately hold all three buttons down to get to bootloader. Try clearing your caches from recovery
Click to expand...
Click to collapse
Tried that already, still stuck at Google page before animations. Everything is stock on this tablet with root.

jalize said:
Tried that already, still stuck at Google page before animations. Everything is stock on this tablet with root.
Click to expand...
Click to collapse
Hi,
Try flashing it fresh stock again, factory reset your device from recovery, download the stock image file from here, untar it, then unzip the zip inside the tar and you'll get some files (.img). Copy those files to your fastboot folder and then open a cmd there. (Guessing that you're using Windows)
Code:
fastboot flash system system.img
fastboot flash boot boot.img
fastboot flash cache cache.img
If you're using Linux, do the same, but instead of only fastboot use:
Code:
sudo ./fastboot
Then boot it. I had the same problem when I updated mine to 4.4.1, but I did one thing a little different... Instead of fully "stocking" it again, I flashed back 4.3, flashed 4.4 OTA and then let it boot, without wiping my data, after all it was running like this before. Worked. But as I'm unsure of your situation I think it's more secure and easier to fully stock it again.
Hope this helps,
~Lord
PS.: Remember to put your device in fastboot mode!

[Q] Boot Loop (CM Recovery)

First of all, I know that there are many people asking same thing. I have checked those threads and I guess I am just a little bit more clueless. Last time I was able to use my Nexus 10 was 3 months ago. Since then I tried to solve it many times, but no luck so far. I will try to explain some of the issues I'm experiencing, but I'm afraid I'm not too good with all the expressions people are using on this forum.
1. ADB vs Fastboot
I see this mentioned often and I don't know what exactly it means. It's amazing to me that I can't google it, I'm usually good with googling. I can see that my N10 is sometimes listed under ADB and sometimes under Fastboot devices but I have no idea what I did to change that. I do know that whatever I try to do at certain point, it's always in "wrong" mode, waiting for adb etc. So if someone can point me to a thorough explanation, a wiki or something, that would be very nice.
2. The Loop
I managed to get ClockworkMod v6.0.4.3 installed and it's this loop that device is now inside. I've tried pretty much all possible combinations, wiped both caches, did factory reset, rebooted to system/bootloader/recovery... nothing. Always ends up on same CM menu.
3. Android Toolkit
I have installed this on my computer and tried so many things that I forgot about all details. I tried flashing the big 400 MB stock image to the device, but haven't been successful (says waiting for ADB, even if the device WAS listed as ADB device before I started the procedure). I am also expecting to see the N10 as another "drive" from my desktop, if you know what I mean, so that I could copy files to it. However I don't see it that way, I only see it registered as a Nexus 10 device, like a mouse or any other non-drive device. Is this normal?
So what to do? Can anyone tell me in a simple way, because I am obviously stupid enough to find threads I've seen so far not clear enough. And I would actually think that my computer literacy level is rather high, I think that this Nexus 10 is the only thing that brought me to my knees in last 20 years of working with computers.
And when I say "simple wiki style" I'm thinking of something like this:
Ok. no links allowed, great. It's a redmondpie article named
/how-to-set-up-android-adb-and-fastboot-on-windows-tutorial/
This is easy enough for me... but do I assume correctly that all this has already been done with me installing Android Toolkit? If so, it uses a different path structure and I don't see all those folders...

So u do have cmw installed, when u try to flash a ROM it just boots to recovery?
Sent from my Nexus 10 using Tapatalk

newellj79 said:
So u do have cmw installed, when u try to flash a ROM it just boots to recovery?
Click to expand...
Click to collapse
You mean flashing ROM only with CWM, not through android toolkit? Through CWM menu I have tried (many times):
- wipe data / factory reset
- wipe cache partition
- wipe dalwik cache
I don't see way to do anything with:
- install zip
- backup and restore
- mounts and storage
Rebooting menu items do following:
- Reboot system --> reboots to same CWM recovery menu
- Reboot to bootloader --> reboots to the stock bootloader "menu" where I can choose between Start, Power Off, Recovery mode (picking this will reboot to CWM recovery menu) and Restart bootloader (picking this will reboot to this same menu)
- Reboot recovery --> reboots to same CWM recovery menu

1 adb works only in os and recovery, fastboot works only in bootloader
2 it looks like your recovery is screwed up, flash this with fastboot
http://techerrata.com/file/twrp2/manta/openrecovery-twrp-2.6.3.1-manta.img
fastboot erase recovery
fastboot flash recovery nameofrecovery.img
3try not to use toolkits, you have a nexus, toolkits are more complicated than manual methods and you won't learn anything from it
Once you have recovery
Wipe all, then you will will need to use adb sideload to flash ROM as you have no ROM on emulated sdcard
Go to advanced menu
adb sideload
adb sideload nameofROM.zip
adb sideload gapps.zip
For more info on fastboot
http://forum.xda-developers.com/showthread.php?t=2277112
Sent from my Nexus 7 using XDA Premium 4 mobile app

demkantor said:
1 adb works only in os and recovery, fastboot works only in bootloader
2 it looks like your recovery is screwed up, flash this with fastboot
http://techerrata.com/file/twrp2/manta/openrecovery-twrp-2.6.3.1-manta.img
fastboot erase recovery
fastboot flash recovery nameofrecovery.img
3try not to use toolkits, you have a nexus, toolkits are more complicated than manual methods and you won't learn anything from it
Once you have recovery
Wipe all, then you will will need to use adb sideload to flash ROM as you have no ROM on emulated sdcard
Go to advanced menu
adb sideload
adb sideload nameofROM.zip
adb sideload gapps.zip
For more info on fastboot
http://forum.xda-developers.com/showthread.php?t=2277112
Sent from my Nexus 7 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
The first part worked ok. The second part doesn't.
ADB sideload - I went there in the Nexus menu
adb sideload kitkat2501.zip
returns this:
* failed to write data 'protocol fault (no status)' *
If I do it without starting adb sideload on nexus, then it just says "error: closed", so it does recognize the change.
I downloaded the latest sdk tool, 64-bit, and the stock nexus 10 rom from 25th Janaury.

Let's do this, grab the latest stock for manta from here
https://developers.google.com/android/nexus/images
fastboot erase system -w
fastboot erase boot
fastboot erase recovery
And extract and run the flashall.bat
This should bring you to the latest official software/firmware. Then with you up and running we can root and give you custom recovery,ROM,whatever
If you have an issues at all please copy and paste all input/output from cmd/terminal here
Sent from my Nexus 7 using XDA Premium 4 mobile app

demkantor said:
Let's do this, grab the latest stock for manta from here
fastboot erase system -w
fastboot erase boot
fastboot erase recovery
And extract and run the flashall.bat
This should bring you to the latest official software/firmware. Then with you up and running we can root and give you custom recovery,ROM,whatever
If you have an issues at all please copy and paste all input/output from cmd/terminal here
Sent from my Nexus 7 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
You are a wizard. I got it all ok now and I added CWM to it, it was easy to root it from there.

Can't boot into recovery no matter how many times it is installed

Hey XDA, Recently installed Paranoid Android coming from Chroma and it's not stuck in a boot loop. I can boot just fine every time besides the annoying corruption google warning, but no matter how many times I try to install TWRP it just won't let me boot into recovery. I'm using WugFresh's NRT kit. Can't seem to figure it out. Any suggestions?

carterl96 said:
Hey XDA, Recently installed Paranoid Android coming from Chroma and it's not stuck in a boot loop. I can boot just fine every time besides the annoying corruption google warning, but no matter how many times I try to install TWRP it just won't let me boot into recovery. I'm using WugFresh's NRT kit. Can't seem to figure it out. Any suggestions?
Click to expand...
Click to collapse
My suggestion is for you to fastboot flash the TWRP recovery image instead of using a toolkit. You cant see the inner workings of a toolkit and have no idea of what it is doing. The toolkit could be using the wrong commands to install a recovery image to your 6P. Go to www.twrp.me and search for the recovery image for your specific device and download the file. Next, rename the file to recovery.img Then, on your PC, navigate to the folder where you downloaded the TWRP image. Open a command prompt in that folder by pressing and holding the SHIFT KEY + RIGHT CLICK on your mouse and select OPEN A COMMAND WINDOW HERE. Boot to the bootloader on your device and connect it to your PC. Then type this:
fastboot flash recovery recovery.img
Then type this:
fastboot reboot bootloader
fastboot reboot recovery
Here is the link to download TWRP for your Nexus 6P
This will reboot your device to TWRP
All of this is based on the assumption that you have a working ADB installation and unlocked the bootloader and have USB Debugging turned on in DEVELOPER OPTIONS.
Sent from my Nexus 6 using XDA-Developers mobile app

Same thing, successful install and it won't open. Just shows the dead android when going to recovery.

carterl96 said:
Same thing, successful install and it won't open. Just shows the dead android when going to recovery.
Click to expand...
Click to collapse
You get the same results after fastboot flashing the TWRP image? I'd say your next step is to start fresh by fastboot flashing the factory images to return to a fully stock state. Then fastboot flash TWRP again.
Sent from my Nexus 6 using XDA-Developers mobile app

Do not boot directly into system after flashing the custom recovery.
After flashing boot into TWRP. I remember on previous devices that I owned that if you do not boot into the custom recovery after flashing it, you revert to the factory recovery.
Just a thought

tech_head said:
Do not boot directly into system after flashing the custom recovery.
After flashing boot into TWRP. I remember on previous devices that I owned that if you do not boot into the custom recovery after flashing it, you revert to the factory recovery.
Just a thought
Click to expand...
Click to collapse
I thought about that too. What is probably happening is his custom recovery is being patched by the ROM each time he boots into recovery. Thanks for picking up on that. I forgot to include that in my last post.
Sent from my Nexus 6 using XDA-Developers mobile app

tech_head said:
Do not boot directly into system after flashing the custom recovery.
After flashing boot into TWRP. I remember on previous devices that I owned that if you do not boot into the custom recovery after flashing it, you revert to the factory recovery.
Just a thought
Click to expand...
Click to collapse
That's correct. After flashing TWRP the next step is reboot into the bootloader using the volume keys and power key , then from there boot into recovery using the volume keys and power key, then the phone can be rebooted from TWRP into Android and then after that TWRP should stick.

If the boot image is not patched, the ROM will overwrite TWRP once you reboot. flashing latest SU from TWRP will prevent this.

Thanks for all the replies guys! All the advice combined got it to work. I did some more research and found that Paranoid doesn't actually come preprooted like all the other roms I've been used to. So using the tool kit I just had it root it with the latest SuperSu and also flash a custom recovery. It has booted into TWRP no problems now a few times. Hopefully it will stay like this. Will keep everyone posted and appreciate the advice. Thanks XDA!