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

[DarthLuch]

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

 

[adm1jtg]

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

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.

 

[DarthLuch]

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.

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!

 

[adm1jtg]

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!

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.

 

[w1bmw]

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