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Unable to boot twrp.img - Stuck in fastboot

Hi everyone!
I unlocked the bootloader (with fastboot oem unlock)
I booted and went through the initial setup
I went back to the bootloader and ran fastboot boot twrp.img
I get stuck on a black screen saying "Fastboot Mode"
The fastboot command outputs
Code:
creating boot image...
creating boot image - 10240 bytes
downloading 'boot.img'...
OKAY [ 0.007s]
booting...
OKAY [ 0.073s]
I have tried twrp versions 3.2.1-0 and 3.2.2-0.
Any ideas why I get stuck and twrp never starts up?

Try re-downloading the TWRP image again and try.

Poloasis said:
Try re-downloading the TWRP image again and try.
Click to expand...
Click to collapse
I tried verifying the .img files against the signature from the download page and the signatures didn't match, I guess I should have checked that before posting here. I must have fudged the downloads somehow...
I tried downloading again, now the signature matched and I could boot it. Thanks!!

This happened to me, I ended up flashing the most recent unofficial TWRP with fastboot and it booted into TWRP then I flashed the official TWRP zip from internal storage and it worked.

Pixel Bootloop (Bootloader unlocked)

So I have been trying to flash the Pixel Factory Image, I have used the most recent SDK Platform Tools and I still can't get past the boot loop. I also have tried to flash the TWRP recovery but I am getting this:
Code:
C:\Users\MyName\Documents\Pixel\minimal_adb_fastboot_1.4.3_portable>fastboot flash recovery twrp-3.3.0-0-sailfish.img
target reported max download size of 536870912 bytes
sending 'recovery' (31000 KB)...
OKAY [ 0.828s]
writing 'recovery'...
(bootloader) Flashing active slot "_b"
FAILED (remote: partition [recovery] doesn't exist)
finished. total time: 0.938s
I have even tried but the bootloop is still there:
Code:
PS C:\Users\MyName\Documents\Pixel\minimal_adb_fastboot_1.4.3_portable> ./fastboot boot twrp-3.3.0-0-sailfish.img
downloading 'boot.img'...
OKAY [ 0.727s]
booting...
OKAY [ 1.010s]
finished. total time: 1.740s

There are a couple things wrong here:
Pixels don't have a recovery partition, everything happens in the boot one (root, twrp, custom kernel)
The first command in the first code block you wrote is wrong because the recovery partition is not there. In case you wanna flash a stock boot image, maybe for recover your device faulty kernel/twrp etc, without have to reflash the whole rom, the command should be "fastboot flash boot boot.img"
The command you sent in the second code block (./fastboot boot twrp-3.3.0-0-sailfish.img) in fact is correct because you just boot the twrp image (= no errors).
But when you wanna flash the recovery, you have to boot the twrp img and when it booted you have to flash the twrp.zip that you can download from the official site from the twrp screen, not the .img
Hope this helps

I'll add that you should also use the official platform-tools downloaded from Google. The minimal (and other alternatives) can give you problems when trying to flash.
The latest platform-tools is here. Note that Google hasn't updated the changelog, and the latest version is actually 28.0.3, not 28.0.2.
For TWRP, you need both the latest .img and .zip files from here, and transfer the .zip file to the Pixel. Use the boot command to boot from the .img, then from within the temporarily-booted TWRP install the .zip file.

Pixel 3a - stuck on BootLoader with: error boot prepar

Hello,
I followed the steps on these two links:
https://forum.xda-developers.com/pixel-3a-xl/how-to/how-to-root-pixel-3a-3a-xl-twrp-t3928868
https://www.**********.com/unlock-pixel-3a-bootloader-and-root-pixel-3a-3a-xl/
To root my Pixel 3A. I unlocked it successfully, and then I did the final step of this command:
fastboot flash boot magisk_patched.img
But now my device is stuck on the bootloader screen. The bottom lines say:
Device state: unlocked
Boot slot: b
Enter reason: error boot prepare
I tried the options on the boot loader (rescue mode, recover mode, restart bootloader, powering off and restarting) but it only takes me back to the bootloader screen with same error.
From my MAC, I can still do the commands:
fastboot reboot (which does reboot the phone)
and
fastboot flash boot magisk_patched.img, which shows this:
Sending 'boot_b' (29136 KB) OKAY [ 0.760s]
Writing 'boot_b' OKAY [ 0.189s]
Finished. Total time: 1.219s
But not sure what else I can do to get out of the bootloader screen
Any help would be appreciated, as the phone is effectively bricked

DarthLuch said:
Hello,
I followed the steps on these two links:
https://forum.xda-developers.com/pixel-3a-xl/how-to/how-to-root-pixel-3a-3a-xl-twrp-t3928868
https://www.**********.com/unlock-pixel-3a-bootloader-and-root-pixel-3a-3a-xl/
To root my Pixel 3A. I unlocked it successfully, and then I did the final step of this command:
fastboot flash boot magisk_patched.img
But now my device is stuck on the bootloader screen. The bottom lines say:
Device state: unlocked
Boot slot: b
Enter reason: error boot prepare
I tried the options on the boot loader (rescue mode, recover mode, restart bootloader, powering off and restarting) but it only takes me back to the bootloader screen with same error.
From my MAC, I can still do the commands:
fastboot reboot (which does reboot the phone)
and
fastboot flash boot magisk_patched.img, which shows this:
Sending 'boot_b' (29136 KB) OKAY [ 0.760s]
Writing 'boot_b' OKAY [ 0.189s]
Finished. Total time: 1.219s
But not sure what else I can do to get out of the bootloader screen
Any help would be appreciated, as the phone is effectively bricked
Click to expand...
Click to collapse
Sounds like your magisk file is either the wrong version or corrupted. Download the full Google image, extract the boot.img from that and ash that image file using the fastboot flash boot boot.img command. Alternatively you could download the mvk kernel from here on xda and flash that. It's pre-rooted.

adm1jtg said:
Sounds like your magisk file is either the wrong version or corrupted. Download the full Google image, extract the boot.img from that and ash that image file using the fastboot flash boot boot.img command. Alternatively you could download the mvk kernel from here on xda and flash that. It's pre-rooted.
Click to expand...
Click to collapse
Thanks for that.. For whatever reason the MVK_Sargo_v10.22_magisk_patched.img version did not work, but the MVK_Sargo_v10.21_magisk_patched.img one did!

DarthLuch said:
Thanks for that.. For whatever reason the MVK_Sargo_v10.22_magisk_patched.img version did not work, but the MVK_Sargo_v10.21_magisk_patched.img one did!
Click to expand...
Click to collapse
If 21 worked but 22 didn't... Going from my faltering memory that means your not on March security, your on feb or earlier. 22 only worked on March, i am running it myself.

I got stuck here, too... I used the flash tool (flash.android.com) and it put me back to stock after about a 20 minute progress bar crawl

I have the same problem can someone help me?

YYa solucionaste ?

How to backup stock recovery before flashing TWRP?

Hi. How can I backup the stock recovery on my Xiaomi Poco X3 NFC before flashing the TWRP?
I tried executing following code while the phone is in fastboot mode but it never actually boots the custom recovery. It get's stuck at the poco boot logo. Yes my phone has unlocked bootloader.
Code:
fastboot boot TWRP.img
In terminal I get this output:
Code:
[email protected]:/# fastboot boot twrp_3.4.0-15_mauronofrio.img
downloading 'boot.img'...
OKAY [ 3.080s]
booting...
OKAY [ 5.088s]
finished. total time: 8.168s
Does anybody know why this command is not working? Thanks.

lebigmac said:
Hi. How can I backup the stock recovery on my Xiaomi Poco X3 NFC before flashing the TWRP?
I tried executing following code while the phone is in fastboot mode but it never actually boots the custom recovery. It get's stuck at the poco boot logo. Yes my phone has unlocked bootloader.
Code:
fastboot boot TWRP.img
In terminal I get this output:
Code:
[email protected]:/# fastboot boot twrp_3.4.0-15_mauronofrio.img
downloading 'boot.img'...
OKAY [ 3.080s]
booting...
OKAY [ 5.088s]
finished. total time: 8.168s
Does anybody know why this command is not working? Thanks.
Click to expand...
Click to collapse
I have had the same issues with that TWRP from mauronofrio and our stock ramdisk image. However, using Orangefox or the latest 3.5.0 TWRP which can be found in the Index for our device (everything can be found there lol) solved that issue, also, you don't need to backup the recovery partition, because the stock can be easily found and flashed the same.

Thanks but that still doesn't explain why the command fastboot boot twrp.img doesn't work on the Xiaomi Poco X3 NFC with unlocked bootloader.
EDIT:
Ok good news. I've actually managed to boot into the TWRP before flashing it.
As soon as it's done uploading the recovery to the phone you must unplug the USB cable. The timing is very important.
Good luck!

lebigmac said:
This appears to be a more widespread issue than I had originally thought:
Fastboot boot <boot.img> doesn't work but flash does
Hi there ! I compiled a kernel for my DB410. I am trying to boot it using $ fastboot boot boot.img Following the instructions that can be found here: https://builds.96boards.org/releases/dragonboard410c/linaro/debian/17.06.1/ Unfortunately, the device doesn’t boot. It starts the booting...
discuss.96boards.org
fastboot boot TWRP.img Not working
I'm trying to just boot the TWRP image for my OnePlus 5t to then install a custom ROM. So I typed fastboot boot "C:\Users\Elias\Downloads\twrp-3.3.1-0-dumpling.img" and it seemed to work and I got ...
android.stackexchange.com
https://www.reddit.com/r/LineageOS/comments/arakiy
After Android Q upgrade fastboot boot doesn't work on guacamole · Issue #1530 · TeamWin/Team-Win-Recovery-Project
I am running an official build of TWRP, downloaded from https://twrp.me/Devices/ I am running the latest version of TWRP I have read the FAQ (https://twrp.me/FAQ/) I have searched for my issue and ...
github.com
Can't boot TWRP image using fastboot boot
I'm trying to root my Moto Z3 Play. I'm on Windows 10, I have already unlocked the bootloader, however, I can't boot the twrp.img. I got the twrp.img from here https://twrp.me/motorola/motorolamoto...
stackoverflow.com
Click to expand...
Click to collapse
try latest OFOX or TWRP (OFOX image needs to be extracted from zip file), I'm really interested if some of these will boot via "fastboot boot recovery.img", thanks

lebigmac said:
Hi. How can I backup the stock recovery on my Xiaomi Poco X3 NFC before flashing the TWRP?
I tried executing following code while the phone is in fastboot mode but it never actually boots the custom recovery. It get's stuck at the poco boot logo. Yes my phone has unlocked bootloader.
Code:
fastboot boot TWRP.img
In terminal I get this output:
Code:
[email protected]:/# fastboot boot twrp_3.4.0-15_mauronofrio.img
downloading 'boot.img'...
OKAY [ 3.080s]
booting...
OKAY [ 5.088s]
finished. total time: 8.168s
Does anybody know why this command is not working? Thanks.
Click to expand...
Click to collapse
You don't need to backup the sock recovery.
Everything you need to do is download the stock rom and extract recovery.

@jeryll thanks for chiming in. All of these TWRP images will boot via "fastboot boot recovery.img" on our device.
It's important to unplug the USB cable at the right moment as soon as it's done uploading. Good luck!

install twrp over recovery

I have an old oneplus i can run the command
"fastboot boot twrp-3.6.2_9-0-bacon.img"
and use twrp and flash twrp it says succesffuly but when i reboot i end up on some chinese recovery.
"
fastboot boot twrp-3.6.2_9-0-bacon.img
downloading 'boot.img'...
OKAY [ 0.483s]
booting...
OKAY [ 0.019s]
finished. total time: 0.505s"
Ive done "fastboot flash recovery twrp-3.6.2_9-0-bacon.img"
in command prompt it complete but doesnt change anything.
In twrp it says "image flash completed"
but after reboot it goes back to the chinese recovery.
i can access file manager, is there a way to delete the old recover so i can get twrp properly installed.