Develop Bugs

I can't boot into custom recovery (TWRP)

I'm having a problem flashing a custom recovery on my Nexus 7. I'm trying to install the TWRP recovery for the "flo" version and it doesn't seem to install. I mean, it says it does in fastboot mode but when I reboot to recovery it goes to the stock recovery instead (the green android with the red triangle) and just stays on that screen for minutes. What gives?

Brushstroke said:
I'm having a problem flashing a custom recovery on my Nexus 7. I'm trying to install the TWRP recovery for the "flo" version and it doesn't seem to install. I mean, it says it does in fastboot mode but when I reboot to recovery it goes to the stock recovery instead (the green android with the red triangle) and just stays on that screen for minutes. What gives?
Click to expand...
Click to collapse
You used
fastboot flash recovery twrp.img?

meekrawb said:
You used
fastboot flash recovery twrp.img?
Click to expand...
Click to collapse
Yep. Solved it though. Apparently in 4.4 they've made it so that the device will replace TWRP with the stock recovery immediately after rebooting if you don't boot into TWRP immediately after installing it using:
fastboot boot name-of-recovery.img
Then you have to change the name of a file while in TWRP. In TWRP go to Mount and select System. Then go back to the main screen and press Advanced > File Manager. Browse to /system and select a file named recovery-from-boot.p and rename it to recovery-from-boot.bak. And you should be able to go into TWRP like normal.

Brushstroke said:
Yep. Solved it though. Apparently in 4.4 they've made it so that the device will replace TWRP with the stock recovery immediately after rebooting if you don't boot into TWRP immediately after installing it using:
fastboot boot name-of-recovery.img
Then you have to change the name of a file while in TWRP. In TWRP go to Mount and select System. Then go back to the main screen and press Advanced > File Manager. Browse to /system and select a file named recovery-from-boot.p and rename it to recovery-from-boot.bak. And you should be able to go into TWRP like normal.
Click to expand...
Click to collapse
Could you please describe this procedure detailed?
Where can I find the "Mount" option?
Must my device being rooted?

Some tricks for you guys if you are stuck like I was :
-if you can't boot to custom recovery, try naming your custom recovery img "recovery.img" instead of "twrp.img" when you flash it.
so --> "fastboot flash recovery recovery.img" will be the command you execute.
-if you can't flash recovery at all, try executing the command without the phone plugged, then plug the device when you see the prompt "<waiting for any device>"
Hope this helps !

TWRP, how to make it work?

Hello!
I unlock the bootloader, installed TWRP (several versions) but it doesn't work.
I enter in recovery, select YES in both options, the green android shows up and the phone just boot normally. TWRP options never displayed.
Any help on this? Plz...
Thank you!

Download: https://dl.twrp.me/h815/
1. fastboot boot recovery your_recovery_image.img
2. flash twrp image from booted twrp

Or fastboot flash recovery twrp.img

No ! This doesnt work. Read the official twrp xda thread.

Hi!
I tried all that, flashed all TWRP versions, all available versions of european rom for LG G4 H815, nothibg... the damn thing just don't work on my phone

Have you followed the right steps?
First use fastboot boot twrp.img (boot not flash)
Then within twrp copy the twrp image from your pc by adb or mtp then use the button to flash an image and then choose the copied twrp to flash to recovery

Now I think you got me... I followed the tutorial how to install twrp but, in the beggining I was having problems with the drivers. Win10 was changing them on every command, and after so much time (I went to sleep at 5 AM ) trying everything that it could work, maybe I just mess on that step....
Thanks for your help. As soon as I have time again, I'll check that step.

Thank you very much @steadfasterX !!!
It works
I followed this tutorial: http://www.technobuzz.net/install-twrp-recovery-on-lg-g4/
Thats why I got mistaken... Thanks once again

First use fastboot boot twrp.img (boot not flash)
Then within twrp copy the twrp image from your pc by adb or mtp then use the button to flash an image and then choose the copied twrp to flash to recovery
Click to expand...
Click to collapse
You're welcome

Stuck in TWRP after attempting to root

I've been following this guide:
https://forum.xda-developers.com/pi...p-flashable-monthly-update-zip-pixel-t3375591
to try and root my Pixel C. I was initially following a different guide, but I believe I now have:
bootloader-dragon-google_smaug.7900.50.0.img and TWRP_dragon_3.1.0-2.img, loaded through fastboot
I was then able to push
Update.ZIP_PixelC_Ryu_system-vendor-boot_OPP1.zip and SuperSU-v2.79-201612051815.zip to /sdcard/ via adb in TWRP. I then tried to install both, as per the guide.
I was a bit confused when the "flashing system.img... this will take some time" part took no time at all, but it had taken a while to get to that point so I figured maybe the messages were in the wrong order or something. Both said they were successful.
Tried booting to system - just came back to TWRP.
So I thought I'd try to flash the system image back on. But I can't push any files now. Everytime I try, it creates the files then fails and I start getting read-only file system errors
If I try to install update.zip again (the one above), I now get "failed to mount '/data-full' (Device or resource busy)"
So I'm quite stuck at this point. Can't revert to stock image, can't install the new image... any help would be much appreciated!

I would do the following:
Download the full factory image from here. If you want to keep all of your data extract the zip and remove "-w" from flash_all.bat or flash_all.sh (depending on your OS).
If you keep -w it wipes your settings.
Boot into fastboot and run flash_all.
It will write all data from the factory image to your device and it should boot into android again.
If your tablet is up and running you can download twrp and flash it again on your tablet.
I always flash twrp like this:
fastboot flash recovery twrp.img
fastboot boot twrp.img
if i boot into twrp it asks for a decryption-pass. I skip this and go directly to reboot and reboot into recovery. Now i will not be asked for a password and can go on flashing the latest supersu.

peter73 said:
I would do the following:
Download the full factory image from here. If you want to keep all of your data extract the zip and remove "-w" from flash_all.bat or flash_all.sh (depending on your OS).
If you keep -w it wipes your settings.
Boot into fastboot and run flash_all.
It will write all data from the factory image to your device and it should boot into android again.
If your tablet is up and running you can download twrp and flash it again on your tablet.
I always flash twrp like this:
fastboot flash recovery twrp.img
fastboot boot twrp.img
if i boot into twrp it asks for a decryption-pass. I skip this and go directly to reboot and reboot into recovery. Now i will not be asked for a password and can go on flashing the latest supersu.
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Click to collapse
I second this ^ except for the fastboot boot twrp.img part. Why do you do that? The first line should be enough.

How can I keep MIUI from overwrite TWRP with stock recovery after a ROM flash?

I'm on fw Global 9.6.6.0.
(Bought the phone 'bogus' unlocked with "fake" 9.6.4.0, bricked it while trying to restore chinese fw and re-lock bootloader using miflash - I'm not doing that again
brought it back to life using the steps from Omer919's thread - thanks Omer919 and Nijel8)
I deleted install-recovery.sh from system/bin using TWRP's file manager before first boot, but it still overwrites MIUI recovery.
It's not a huge deal because I guess I can always fastboot flash twrp before flashing any new ROM, but does anyone have a solution? Much appreciated!

You have to boot to twrp right after flashing.
Go to twrp official site, choose your device and follow exactly instruction to the end.
It wouldnt harm your device if you reboot it to twrp twice.

Thanks, I tried but it reverts to stock recovery. After flashing TWRP in fastboot, I either try Fastboot boot twrp.img or disconnect the cable and hold power and vol+.
Either way, it goes into TWRP, and I make it boot back into TWRP several times with no problem.
But as soon as I boot to System, it reverts to stock.
TWRP site gives me this info (but it didn't work):
Note many devices will replace your custom recovery automatically during first boot. To prevent this, use Google to find the proper key combo to enter recovery. After typing fastboot reboot, hold the key combo and boot to TWRP. Once TWRP is booted, TWRP will patch the stock ROM to prevent the stock ROM from replacing TWRP. If you don't follow this step, you will have to repeat the install.

OMG I found it - Google really is a friend. All I had to do was install Magisk before booting to System.
Below are my exact steps, if that helps someone.
Preliminary:
Download Magisk 17.1 zip, place it on a USB flashdrive.
Install latest magiskmanager apk from Play store (or sideload it if not on the store)
1- In Fastboot:
fastboot flash recovery twrp.img
fastboot boot twrp.img (If all goes well, this boots to TWRP; if prompted for a code, hit cancel)
2- Disconnect the cable.
Reboot to recovery once more (just to make sure, this is probably redundant; hit cancel if prompted for a code)
3- Mount USB-OTG, connect your flashdrive.
Install Magisk.
During the installation, you'll see some red fail lines, but Magisk seems to work around the encryption, just be patient.
4-Reboot System. You're done! Launch MagiskManager. Device is rooted in the process, too. (Verify with a root checker app).
Power Off. Hit Power + volume Up - You should boot to TWRP.

thanks a million McNoob. I was lost, but due to your hints I managed to install Magisk

Hi i cant boot to twrp and it keeps reverting to stock recover..
already tried this "fastboot flash recovery twrp.img
fastboot boot twrp.img (If all goes well, this boots to TWRP; if prompted for a code, hit cancel) "
after sending the last command line the phone reboot but its just black screen.. i try to reboot the phone again and boot it to recovery but still stock recovery is preset.. thanks

Thanks man! It worked for me as well!

Lamantin001 said:
Thanks man! It worked for me as well!
Click to expand...
Click to collapse
How did it work for you

thanks but.... the twrp for nitrogen is corrupted apparently and nothing work

Twrp installation problem in Realme 3.

I have unlocked my bootloader of realme 3. After flashing twrp it's not booting in recovery mode but restarts the system.
Please give it's solution.

You shouldn't have flashed twrp. Just boot it from a command prompt/PowerShell.
Code:
Fastboot boot twrp.img
You can install from within twrp if you want to (on some models - others can only boot, not install).